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41 results about "Bismuth fluoride" patented technology
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Bismuth fluoride may refer to: Bismuth trifluoride, BiF₃ Bismuth pentafluoride, BiF₅
Bismuth Fluoride Based Nanocomposites as Electrode Materials
The present invention relates to primary and secondary electrochemical energy storage systems, particularly to such systems as battery cells, which use materials that take up and release ions as a means of storing and supplying electrical energy.
Owner:RUTGERS THE STATE UNIV
Double-function negative electrode and applications of double-function negative electrode as all-vanadium flow battery negative electrode
ActiveCN104518221AReduces electrochemical polarizationIncrease working current densityMaterial nanotechnologyCell electrodesFormateCharge transfer resistance
The invention relates to an all-vanadium flow battery double-function negative electrode, wherein a carbon material is adopted as a substrate, a Bi-containing electro-catalyst is modified on the surface of the substrate, the Bi-containing electro-catalyst is one or more than two selected from a Bi elementary substance, Bi2O3, a Bi halide and a Bi metal salt, the Bi halide is bismuth fluoride, bismuth trichloride, bismuth bromide, or bismuth iodide, and the Bi metal salt is bismuth sulfate, bismuth nitrate, bismuth phosphate, bismuth formate or bismuth acetate. According to the present invention, the electrode is suitable for the negative electrode of the all-vanadium flow battery, the electrocatalysis activity and the electrochemical reversibility of the electrode material on the V<2+> / V<3+> oxidation reduction reaction can be substantially improved, and the charge transfer resistance can be reduced; and the high hydrogen evolution overpotential is provided so as to inhibit the occurrence of the hydrogen evolution reaction and prolong the service life of the battery.
Owner:DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
Bismuth fluoride based nanocomposites as electrode materials
Owner:RUTGERS THE STATE UNIV
Liquid phase synthetic Zr<4+> doped bismuth fluoride lithium-ion battery positive electrode material and preparation method thereof
ActiveCN104891570AReduce overpotentialHigh purityCell electrodesSecondary cellsDouble saltSide reaction
The invention relates to a liquid phase synthetic Zr<4+> doped bismuth fluoride lithium-ion battery positive electrode material and a preparation method thereof. According to the method, reaction raw materials such as an ammonium fluoride solution and a bismuth salt solution are converted into tiny liquid droplets through the effect of a surfactant, and with the effect of a specific auxiliary agent and the centrifugal force field, the generated bismuth fluoride solid small particles are subjected to surface auxiliary agent covering and concurrently leave the reaction system, such that the possibility that the generated bismuth fluoride solid small particles continuously act with the ammonium fluoride to form a plurality of the double salts is substantially reduced; with the Zr<4+> doping, the overpotential of the material is reduced; and the bismuth fluoride material adopted as the lithium-ion battery positive electrode material has the specific capacity exceeding 200 mAh.g<-1>. According to the present invention, the method has characteristics of low equipment requirement and high product purity, the condition that a plurality of the double salts of the bismuth fluoride and other side reaction products are generated in the liquid phase reaction can be avoided, and the material has the excellent electrochemical property.
Owner:嘉兴市燕知网络科技有限公司
Solid-phase synthesis oxygen bearing bismuth fluoride anode material for lithium ion battery and preparation method thereof
The invention relates to a solid-phase synthesis oxygen bearing bismuth fluoride anode material for a lithium ion battery and a preparation method of the solid-phase synthesis oxygen bearing bismuth fluoride anode material. The preparation method comprises the following steps: a quaternary ammonium salt taking fluoride as an anion is taken as a raw material, the raw material is in solid-phase synthesis into bismuth fluoride by steric hindrance of a macroradical and the action of a specific additive directly, and at the same time, oxygen permeates into a lattice in an ozone atmosphere, so that the electronic conductivity of material is improved greatly; high-purity bismuth fluoride is taken as a cathode material for a secondary battery, and has specific capacity exceeding 200 mAh.g<-1>. The preparation method is low in equipment requirement, the product is high in purity, reaction by-products such as various complex salts for producing bismuth fluoride in the solid-phase reaction can be avoided, and the solid-phase synthesis oxygen bearing bismuth fluoride anode material has excellent electrochemical performance.
Owner:湖州优研知识产权服务有限公司
Bismuth fluoride lithium ion cell anode material prepared through liquid phase synthesis and having B<3+> and La<3+> doped orthorhombic structure and preparation method of bismuth fluoride lithium ion cell anode material
ActiveCN104795536AHigh specific capacityImprove electronic conductivitySecondary cellsNon-aqueous electrolyte accumulator electrodesPhysical chemistryDouble salt
The invention discloses a bismuth fluoride lithium ion cell anode material prepared through liquid phase synthesis and having a B<3+> and La<3+> doped orthorhombic structure and a preparation method of the bismuth fluoride lithium ion cell anode material. According to the method, the orthorhombic-structure bismuth fluoride is prepared by taking a liquid phase reaction, designing the technological conditions and introducing a plurality of auxiliaries; the specific capacity and the electronic conductivity of the material are improved by doping B<3+> and La<3+>; when the bismuth fluoride material is used as the lithium ion cell anode material, the specific capacity of the bismuth fluoride material is higher than 200 mAh / g<-1>. The method is low in equipment requirement, high in product purity, capable of avoiding generation of multiple side reaction products, such as double salt, of bismuth fluoride in the liquid phase reaction, and excellent in electrochemical performance.
Owner:嘉兴市燕知网络科技有限公司
Preparation method of regular octahedral bismuth fluoride material
The invention relates to a preparation method of a regular octahedral bismuth fluoride material. The method comprises the following steps: (1) dissolving bismuth fluoride into deionized water, adding concentrated nitric acid and preparing a bismuth nitrate solution with the molar concentration of 45-55mM; (2) dissolving sodium fluoride into the deionized water and adding polyvinylpyrrolidone to prepare a sodium fluoride solution with the molar concentration of 37.5-125mM; (3) adding the bismuth nitrate solution to the sodium fluoride solution, carrying out standing reaction at 20-30 DEG C to obtain a sediment, wherein the volume ratio of the bismuth nitrate solution to the sodium fluoride solution is 1 to (3.5-4.5); and (4) filtering, washing and drying the sediment obtained in the step (3) to obtain the regular octahedral bismuth fluoride material. According to the preparation method, the regular octahedral bismuth fluoride material can be synthesized by one-step reaction; the cost is saved; the environment is protected; and the product is high in purity, uniform and regular in shape and size, and beneficial to large-scale mass production in future.
Owner:ZHEJIANG UNIV
Electrochemistry preparation method of nano flaky BiF3 film and application of nanometer flaky bismuth fluoride film
ActiveCN107815701AProcess environmental protectionSimple processPhysical/chemical process catalystsElectrolysis componentsEnvironmental resistancePhotocatalytic degradation
The invention discloses an electrochemistry preparation method of a nano flaky BiF3 film and application of the nanometer flaky bismuth fluoride film, and belongs to the fields of Bi-based film photocatalytic material research and development, a solar energy photocatalyst immobilization technology and an organic pollutant disposal technology. The problems that the existing film immobilization technology is complicated or higher in energy consumption are solved. A Bi plate is taken as an anode, graphite is taken as a cathode, and a mixed solution is taken as electrolyte; in the mixed solution,concentration of ammonium fluoride is 0.5%-1.5%, and the volume ratio of ethylene glycol to distilled water is different; under normal temperature and normal pressure, in-situ growth of the nano flakyBiF3 film is on the Bi plate and the preparation method is a simple, economical and feasible nano flaky Bi-based catalyst film immobilization technology. The nano flaky BiF3 film is applied to photocatalytic degradation of Rhodamine B, is environmentally friendly in process, simple in technology, easy to operate, high in repeatability and short in period.
Owner:TAIYUAN UNIV OF TECH
Liquid-phase synthetic bismuth fluoride lithium ion battery positive electrode material and preparation method thereof
ActiveCN104909393AAvoid generatingLow equipment requirementsCell electrodesLithium halidesPhysical chemistryDouble salt
The invention relates to a liquid-phase bismuth fluoride lithium ion battery positive electrode material and a preparation method thereof. The method is characterized in that bismuth fluoride is prepared through designing technologic conditions and introducing various assistants through a liquid phase reaction, and the bismuth fluoride material can be used as a lithium ion battery positive electrode material and has a specific capacity exceeding 200mAh.g<-1>. The method has the advantages of low requirements on a device, high product purity, and avoiding of generation of various double salts of bismuth fluoride, and other side reaction products in the liquid phase reaction.
Owner:湖州优研知识产权服务有限公司
Novel use of bismuth fluoride
InactiveCN105107530ADiscover new usesIncrease varietyPhysical/chemical process catalystsIrradiationBismuth fluoride
Owner:NANJING UNIV OF INFORMATION SCI & TECH
Non-acid system liquid phase synthesized C/Bi/BiF3 composite bismuth fluoride lithium ion battery positive electrode material and preparation method thereof
InactiveCN106972160AJoin exemptionIncrease capacityCell electrodesSecondary cellsHydrolysisLithium-ion battery
The invention relates to a non-acid system liquid phase synthesized C / Bi / BiF3 composite bismuth fluoride lithium ion battery positive electrode material and a preparation method thereof. According to the method, the addition of dilute nitric acid for suppressing hydrolysis is omitted by designing a mixing mode of raw materials of bismuth nitrate pentahydrate and ammonium fluoride and an addition mode and addition rate of water, and a risk that high-toxicity hydrogen fluoride is generated by an effect of the dilute nitric acid and the ammonia fluoride is prevented; moreover, a certain amount of high-conductivity carbon and metal bismuth are reduced on surfaces of bismuth fluoride particles in an in-situ way, metal bismuth provides a homogeneous crystal core for an electrode material during discharging, and dynamics blocking formed by a new phase is reduced; and during the reaction process, side-reaction products such as various compound salts of the bismuth fluoride in liquid phase reaction are prevented, and the material has excellent electrochemical performance.
Owner:宁波吉电鑫新材料科技有限公司
Bismuth fluoride and copper fluoride composite lithium ion battery positive electrode material with gradient coating layer, and preparation method therefor
ActiveCN105845905AImprove surface electronic conductivityRetain propertiesCell electrodesSecondary cellsCopper fluoridePhysical chemistry
The invention discloses an Fe<2>O<3> and FeF<3-2x>O<x> gradient coated bismuth fluoride and copper fluoride dual-component composite lithium ion battery positive electrode material, and a preparation method therefor. According to the preparation method, poly-quaternary ammonium salt of different structures is taken as a template solid phase to prepare the bismuth fluoride and copper fluoride dual-component composite positive electrode material; according to the characteristic that FeF<3> is prone to be gradually oxidized into Fe<2>O<3> at a relatively high temperature, the exterior of the bismuth fluoride and copper fluoride dual-component composite positive electrode material is coated with FeF<3-2x>O<x> and the Fe<2>O<3> layer in sequence, wherein x is greater than 0 and less than 0.3, so as to improve the surface electron conductivity of the bismuth fluoride and copper fluoride dual-component composite positive electrode material in order to resist the harmful effect on the surfaces of the material granules from the organic electrolyte; and consequently, the comprehensive electrochemical performance of the bismuth fluoride and copper fluoride dual-component composite positive electrode material is greatly improved.
Owner:NINGBO UNIV
A kind of fluorination process containing 1,3-dioxolane ester or 1,3-dioxane ester perfluorinated compound
The invention provides a fluorination process of 1,3-dioxolame ester or 1,3-dioxane ester containing perfluorinated compounds. The process comprises the following steps of putting a first fluorinationsolvent and a catalyst into a reaction kettle, wherein the catalyst is selected from one or several of boron trifluoride, cobalt trifluoride, bismuth trifluoride and arsenic trifluoride; dissolving ahydrocarbon substrate and a surfactant in a second fluorination solvent to obtain a raw material solution, wherein the surfactant is selected from one or several of perfluorononanoic acid, perfluorooctane sulfonate and tetrabutylammonium fluoride, and the hydrocarbon substrate is of a structure of a formula (I) or a formula (II); performing fluorination reaction on the raw material liquid and fluorine gas in the reaction kettle to obtain the perfluorinated compounds. In the specific fluorine-containing solvent, the low-cost hydrocarbon compounds are used as starting raw materials; the specialfluorine-containing surfactants and catalysts are used as the assistance so that the fluorine gas and the raw materials are in direct contact to be converted into the perfluorinated compounds. The method is simple; the cost is low; meanwhile, the yield is high.
Owner:BARUCH MATERIALS (SHENZHEN) CO LTD +1
A liquid phase synthesis b 3+ , la 3+ Doped orthogonal structure bismuth fluoride lithium ion battery positive electrode material and preparation method thereof
ActiveCN104795536BHigh specific capacityImprove electronic conductivitySecondary cellsNon-aqueous electrolyte accumulator electrodesPhysical chemistryDouble salt
The invention discloses a bismuth fluoride lithium ion cell anode material prepared through liquid phase synthesis and having a B<3+> and La<3+> doped orthorhombic structure and a preparation method of the bismuth fluoride lithium ion cell anode material. According to the method, the orthorhombic-structure bismuth fluoride is prepared by taking a liquid phase reaction, designing the technological conditions and introducing a plurality of auxiliaries; the specific capacity and the electronic conductivity of the material are improved by doping B<3+> and La<3+>; when the bismuth fluoride material is used as the lithium ion cell anode material, the specific capacity of the bismuth fluoride material is higher than 200 mAh / g<-1>. The method is low in equipment requirement, high in product purity, capable of avoiding generation of multiple side reaction products, such as double salt, of bismuth fluoride in the liquid phase reaction, and excellent in electrochemical performance.
Owner:嘉兴市燕知网络科技有限公司
A dual-functional negative electrode and its application as negative electrode for all-vanadium redox flow battery
ActiveCN104518221BReduces electrochemical polarizationIncrease working current densityMaterial nanotechnologyCell electrodesFormateCharge transfer resistance
A dual-functional negative electrode for an all-vanadium redox flow battery, the dual-functional negative electrode is based on a carbon material, and its surface is modified with a Bi-containing electrocatalyst, and the Bi-containing electrocatalyst is Bi simple substance, Bi2O3, Bi halide or Bi One or more than two kinds of metal salts; Bi halides are bismuth fluoride, bismuth chloride, bismuth bromide or bismuth iodide; Bi metal salts are bismuth sulfate, bismuth nitrate, bismuth phosphate, bismuth formate or bismuth acetate . This electrode is suitable for the negative electrode of the all-vanadium redox flow battery, which can greatly improve the electrocatalytic activity and electrochemical reversibility of the electrode material for the V2+ / V3+ redox reaction, reduce the charge transfer resistance; it also has a high hydrogen evolution overpotential, It can inhibit the occurrence of hydrogen evolution reaction and prolong the working life of the battery.
Owner:DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
Solid phase synthetic Co<2+> doped bismuth fluoride lithium-ion battery positive electrode material and preparation method thereof
ActiveCN104900853AImprove electronic conductivityHigh purityCell electrodesSecondary cellsSide reactionLithium-ion battery
The invention relates to a solid phase synthetic Co<2+> doped bismuth fluoride lithium-ion battery positive electrode material and a preparation method thereof. According to the method, a quaternary ammonium salt adopting fluorine as anions is adopted as a raw material, the bismuth fluoride is subjected to direct solid-phase synthesis through the large group steric hindrance effect and through the effect of a specific auxiliary agent, and the electronic conductivity of the material is improved through the Co<2+> doping, wherein the bismuth fluoride material adopted as the lithium-ion battery positive electrode material has the specific capacity exceeding 200 mAh.g<-1>. According to the present invention, the method has characteristics of low equipment requirement and high product purity, the condition that a plurality of the double salts of the bismuth fluoride and other side reaction products are generated in the liquid phase reaction can be avoided, and the material has the excellent electrochemical property.
Owner:湖州优研知识产权服务有限公司
Solid-phase synthesis bismuth fluoride lithium ion battery anode material with Co<2+> and Cu<2+> doped structure and preparation method of solid-phase synthesis bismuth fluoride lithium ion battery anode material
ActiveCN104795537AIncrease the average discharge potentialImprove electronic conductivitySecondary cellsNon-aqueous electrolyte accumulator electrodesQuaternary ammonium cationOxygen
The invention relates to a solid-phase synthesis bismuth fluoride lithium ion battery anode material with a Co<2+> and Cu<2+> doped structure and a preparation method of the solid-phase synthesis bismuth fluoride lithium ion battery anode material. The preparation method comprises the following steps: a quaternary ammonium salt taking fluoride as an anion is taken as a raw material, the raw material is in solid-phase synthesis into bismuth fluoride with an orthorhombic structure directly through steric hindrance of a macroradical and the action of a specific additive, and at the same time, the average discharge potential of the material is improved through Cu<2+> doping, and the electronic conductivity of the material is improved through Co<2+> doping, and the bismuth fluoride material is taken as a lithium ion battery anode material and has specific capacity exceeding 200 mAh.g<-1>. The preparation method is low in equipment requirement, the product is high in purity, reaction by-products such as various complex salts for producing bismuth fluoride in the solid-phase reaction can be avoided, and the solid-phase synthesis oxygen bearing bismuth fluoride anode material is excellent in electrochemical performance.
Owner:NINGBO UNIV
A kind of liquid phase synthesis of bismuth fluoride lithium ion battery cathode material and preparation method thereof
ActiveCN104909393BAvoid generatingLow equipment requirementsCell electrodesLithium halidesPhysical chemistryDouble salt
The invention relates to a liquid-phase bismuth fluoride lithium ion battery positive electrode material and a preparation method thereof. The method is characterized in that bismuth fluoride is prepared through designing technologic conditions and introducing various assistants through a liquid phase reaction, and the bismuth fluoride material can be used as a lithium ion battery positive electrode material and has a specific capacity exceeding 200mAh.g<-1>. The method has the advantages of low requirements on a device, high product purity, and avoiding of generation of various double salts of bismuth fluoride, and other side reaction products in the liquid phase reaction.
Owner:恩可(嘉兴)科技有限公司
A kind of bismuth fluoride copper fluoride composite lithium battery cathode material with gradient coating layer and preparation method thereof
ActiveCN105845905BImprove surface electronic conductivityRetain propertiesCell electrodesSecondary cellsComposite cathodeCopper fluoride
a kind of Fe 2 o 3 |FeF 3‑2x o x Gradient-coated bismuth fluoride copper fluoride two-component composite lithium battery positive electrode material and its preparation method, the method uses polyquaternium salts of different structures as templates to prepare bismuth fluoride copper fluoride two-component composite positive electrode materials in the solid phase, according to FeF 3 It is easy to be gradually oxidized to Fe at higher temperature 2 o 3 The characteristics of bismuth fluoride and copper fluoride two-component composite cathode material are sequentially coated with FeF 3‑ 2x o x , 0<x<0.3, and Fe 2 o 3 layer to improve the surface electronic conductivity of the two-component bismuth fluoride copper fluoride composite cathode material and resist the harmful effect of the organic electrolyte on the surface of the material particles; thereby greatly improving the bismuth fluoride copper fluoride two-component composite cathode material Comprehensive electrochemical performance.
Owner:NINGBO UNIV
Cu<2+> and Fe<3+> doped laminar bismuth fluoride lithium ion cell anode material prepared through liquid phase synthesis and preparation method of bismuth fluoride lithium ion cell anode material
ActiveCN104795539AHigh voltageGood capacity retentionCell electrodesSecondary cellsLithiumPhysical chemistry
The invention discloses a Cu<2+> and Fe<3+> doped laminar bismuth fluoride lithium ion cell anode material prepared through liquid phase synthesis and a preparation method of the bismuth fluoride lithium ion cell anode material. According to the method, the laminar bismuth fluoride is prepared by taking a liquid phase reaction, designing the technological conditions and introducing a plurality of auxiliaries; the discharge platform voltage and the capacity retention performance of the material are improved by doping Cu<2+> and Fe<3+>; when the bismuth fluoride material is used as the lithium ion cell anode material, the specific capacity of the bismuth fluoride material is higher than 200 mAh / g<-1>. The method is low in equipment requirement, high in product purity, capable of avoiding generation of multiple side reaction products such as double salt of bismuth fluoride in the liquid phase reaction, and excellent in electrochemical performance.
Owner:嘉兴市燕知网络科技有限公司
Continuous conduction in-situ C/metal solid solution/Ni<2+>, Ca<2+> doped BiF3 positive electrode and preparation method
InactiveCN106953083AIncrease capacityImprove cycle capacity stabilityCell electrodesSecondary cellsCarbon filmPhase formation
The invention discloses a continuous conduction in-situ C / metal solid solution / Ni<2+>, Ca<2+> doped BiF3 composite bismuth fluoride lithium ion battery positive electrode material and a preparation method thereof. According to the method, in the drying process under low-temperature and high-vacuum conditions and the carbonization and in-situ reduction process under gas protection, a continuous carbon film of a hole and gap structure is formed, bismuth fluoride is fixedly formed on the carbon film and a certain amount of metal solid solution and silver are reduced in situ on the surfaces of bismuth fluoride particles, so that the electronic conductivity of the composite material is greatly improved; a homogeneous crystallization core is provided for the electrode material during discharging, and the kinetic blockage of new phase formation is reduced; Ni<2+> and Ca<2+> doping is further beneficial for improving the discharge reaction rate; and moreover, various side reaction products such as double salts of bismuth fluoride are further prevented from being generated in a liquid-phase reaction, and the material has excellent electrochemical performance.
Owner:宁波吉电鑫新材料科技有限公司
A kind of electrochemical preparation method of nano-flaky bismuth fluoride thin film and its application
ActiveCN107815701BProcess environmental protectionSimple processPhysical/chemical process catalystsElectrolysis componentsPhotocatalytic degradationElectrolyte
An electrochemical preparation method and application of nanosheet bismuth fluoride film, which belongs to the research and development of Bi-based thin film photocatalytic materials, solar photocatalyst immobilization technology, and organic pollutant treatment technology. It can solve the complex problems of existing film immobilization technology. Or to solve the problem of high energy consumption, Bi plate is used as anode, graphite is used as cathode, and mixed solutions of ethylene glycol and distilled water with different volume ratios of ammonium fluoride concentration of 0.5% to 1.5% are used as electrolytes. The original Bi plate is used at normal temperature and pressure. Bit-grown nanosheet BiF 3 Thin film is a simple, economical and feasible nanosheet Bi-based catalyst film immobilization technology. The invention is applied to the photocatalytic degradation of rhodamine B. The process is environmentally friendly, the process is simple, easy to operate, has strong repeatability and a short cycle.
Owner:TAIYUAN UNIV OF TECH
A solid phase synthesis co 2+ ,cu 2+ Doped orthogonal structure bismuth fluoride lithium ion battery positive electrode material and preparation method thereof
ActiveCN104795537BIncrease the average discharge potentialImprove electronic conductivitySecondary cellsNon-aqueous electrolyte accumulator electrodesQuaternary ammonium cationOxygen
The invention relates to a solid-phase synthesis bismuth fluoride lithium ion battery anode material with a Co<2+> and Cu<2+> doped structure and a preparation method of the solid-phase synthesis bismuth fluoride lithium ion battery anode material. The preparation method comprises the following steps: a quaternary ammonium salt taking fluoride as an anion is taken as a raw material, the raw material is in solid-phase synthesis into bismuth fluoride with an orthorhombic structure directly through steric hindrance of a macroradical and the action of a specific additive, and at the same time, the average discharge potential of the material is improved through Cu<2+> doping, and the electronic conductivity of the material is improved through Co<2+> doping, and the bismuth fluoride material is taken as a lithium ion battery anode material and has specific capacity exceeding 200 mAh.g<-1>. The preparation method is low in equipment requirement, the product is high in purity, reaction by-products such as various complex salts for producing bismuth fluoride in the solid-phase reaction can be avoided, and the solid-phase synthesis oxygen bearing bismuth fluoride anode material is excellent in electrochemical performance.
Owner:NINGBO UNIV
A solid phase synthesis co 2+ Doped bismuth fluoride lithium ion battery cathode material and preparation method thereof
ActiveCN104900853BImprove electronic conductivityHigh purityCell electrodesSecondary cellsQuaternary ammonium cationDouble salt
Owner:湖州优研知识产权服务有限公司
Lithium battery positive electrode material with Bi2O3/BiF<3-2x>O<x>/Zn<2+> and Mg<2+> doping bismuth fluoride layer structure and preparation method of lithium battery cathode material
InactiveCN105742603AImprove electrochemical performanceIncrease the speed of diffusionCell electrodesSecondary cellsPhysical chemistryElectronic conductivity
The invention relates to a lithium battery cathode material with a Bi2O3 / BiF<3-2x>O<x> / Zn<2+> and Mg<2+> doping bismuth fluoride layer structure and a preparation method of the lithium battery cathode material. With the characteristic that BiF3 is easily gradually oxidized to Bi2O3 in a relatively high temperature after Zn<2+> and Mg<2+> doping bismuth fluoride is synthesized by using a solid phase, a BiF<3-2x>O<x> layer (x is more than 0 and less than 0.3) and a Bi2O3 layer sequentially wraps Zn<2+> and Mg<2+> doping bismuth fluoride particles to improve surface electronic conductivity capability of the Zn<2+> and Mg<2+> doping bismuth fluoride and resist a harmful effect of an organic electrolyte on the surfaces of the material particles, and with the combination of Zn<2+> and Mg<2+> doping, the comprehensive electrochemical performance of bismuth fluoride is substantially improved.
Owner:NINGBO UNIV
Bismuth fluoride/ferric fluoride composite positive electrode material with gradient cladding layer of lithium battery and preparation method of composite positive electrode material
InactiveCN105810909AImprove surface electronic conductivityRetain propertiesCell electrodesSecondary cellsElectronMaterials science
The invention relates to a Fe<2>O<3> / FeF<3-2x>O<x> gradient cladding bismuth fluoride / ferric fluoride dual-constituent composite positive electrode material of a lithium battery and a preparation method of the composite positive electrode material. The bismuth fluoride / ferric fluoride dual-constituent composite positive electrode material is prepared through a solid phase by taking quaternary ammonium salts with different structures as template, FeF<3-2x>O<x> (x is more than 0 but less than 0.3) and a Fe<2>O<3> layer sequentially wrap the bismuth fluoride / ferric fluoride dual-constituent composite positive electrode material according to the characteristic that FeF<3> is easy to be gradually oxidized to Fe<2>O<3> in a relatively high temperature, so that the surface electron conductivity capability of the bismuth fluoride / ferric fluoride dual-constituent composite positive electrode material is improved, an adverse effect of an organic electrolyte on the surface of the material particle is resisted, so that the comprehensive electrochemical performance of the bismuth fluoride / ferric fluoride dual-constituent composite positive electrode material is substantially improved.
Owner:NINGBO UNIV
Continuous conduction in-situ C/Ag, metal solid solution/Mg<2+> doped BiF3 positive electrode and preparation method
InactiveCN106953085AIncrease capacityImprove cycle capacity stabilityCell electrodesSecondary cellsCarbon filmPhase formation
The invention discloses a continuous conduction in-situ C / Ag, metal solid solution / Mg<2+> doped BiF3 composite bismuth fluoride lithium ion battery positive electrode material and a preparation method. According to the method, in the drying process under low-temperature and high-vacuum conditions and the carbonization and in-situ reduction process under gas protection, a continuous carbon film of a hole and gap structure is formed, bismuth fluoride is fixedly formed on the carbon film and a certain amount of metal solid solution and silver are reduced in situ on the surfaces of bismuth fluoride particles, so that the electronic conductivity of the composite material is greatly improved; a homogeneous crystallization core is provided for the electrode material during discharging, and the kinetic blockage of new phase formation is reduced; the discharge ration rate is improved; Mg<2+> doping is further beneficial for reducing the crystal granularity of the discharge product; and moreover, various side reaction products such as double salts of bismuth fluoride are further prevented from being generated in a liquid-phase reaction, and the material has excellent electrochemical performance.
Owner:宁波吉电鑫新材料科技有限公司
Absorption tower body material for desulfurization and denitrification device
The invention relates to an absorption tower body material for a desulfurization and denitrification device. The absorption tower body material comprises the following components of, in parts by weight, 55-65 parts of aluminum-tin alloy, 17-31 parts of manganese, 16-27 parts of silicon nitride, 7-14 parts of bismuth fluoride, 5-10 parts of molybdenum fiber yarns with 3-6 meshes, 2-4 parts of perlite particles, 1-3 parts of ceramic fibers and 1-2 parts of potassium borohydride. The material is excellent in performance, high in strength, resistant to corrosion and reliable in operation.
Owner:江苏赛尔亚环保科技有限公司
Continuous conducting liquid-phase synthetic C/Ag and BiF3 composite bismuth fluoride cathode material for lithium-ion battery and preparation method thereof
InactiveCN106848263AImprove electronic conductivityIncrease capacityCell electrodesSecondary cellsCarbon filmReaction rate
The invention discloses a continuous conducting liquid-phase synthetic C / Ag and BiF3 composite bismuth fluoride cathode material for a lithium-ion battery and a preparation method thereof. According to the method, through the design on the mixing way of reactive raw materials bismuth nitrate pentahydrate and ammonium fluoride and the addition way and the addition rate of water, the addition of dilute nitric acid inhibiting hydrolysis is avoided; the existence of the risk that the dilute nitric acid acts with the ammonium fluoride to generate high-toxicity hydrogen fluoride is avoided; meanwhile, a high-conductivity continuous carbon film which is of a structure with holes and gaps is formed through a drying process in low-temperature and high-vacuum conditions and a subsequent heat treatment process; certain amounts of bismuth and metal silver are reduced out in situ on the surface of a bismuth fluoride particle; a homogeneous crystallization nucleus is provided for an electrode material while discharging; the formation kinetic blockage of a novel phase is decreased; the improvement of a discharging reaction rate is facilitated; the generation of reaction by-products of multiple double salts of the bismuth fluoride, and the like, in a liquid-phase reaction is avoided; the cathode material has excellent electrochemical performance.
Owner:宁波吉电鑫新材料科技有限公司
A solid phase synthesis al 3+ ,cu 2+ Doped cubic bismuth fluoride lithium ion battery positive electrode material and preparation method thereof
ActiveCN104882602BIncrease the average discharge potentialHigh purityCell electrodesSecondary cellsLithium-ion batterySolid-phase synthesis
The invention provides an Al<3+> and Cu<2+> doped cubic-structure bismuth fluoride lithium ion battery positive electrode material based on solid phase synthesis and a preparation method thereof. According to the method, a quaternary ammonium salt utilizing fluorine as negative ions is adopted as a raw material so as to directly synthesize cubic-structure bismuth fluoride by virtue of a large-group steric hindrance effect and the effect of a specific accessory ingredient in a solid phase manner; furthermore, Cu<2+> is doped, so that the average discharge electric potential of the raw material is improved; Al<3+> is doped, so that the capacity circulation stability is improved; serving as a lithium ion battery positive electrode material, the bismuth fluoride material has a specific capacity greater than 200mAh.g<-1>. The method is low in equipment requirement and high in product purity, and can be used for avoiding the problem that byproducts such as multiple complex salts of bismuth fluoride are generated during solid-phase reaction; the product has excellent electrochemical performance.
Owner:嘉兴市燕知网络科技有限公司
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