212results about How to "Improve electrode performance" patented technology

To form a layer separating two volumes of aqueous solution, there is used an apparatus comprising elements defining a chamber, the elements including a body of non-conductive material having formed therein at least one recess opening into the chamber, the recess containing an electrode. A pre-treatment coating of a hydrophobic fluid is applied to the body across the recess. Aqueous solution, having amphiphilic molecules added thereto, is flowed across the body to cover the recess so that aqueous solution is introduced into the recess from the chamber and a layer of the amphiphilic molecules forms across the recess separating a volume of aqueous solution introduced into the recess from the remaining volume of aqueous solution.

The present invention relates generally to medical devices; in particular and without limitation, to unique electrodes and / or electrical lead assemblies for stimulating cardiac tissue, muscle tissue, neurological tissue, brain tissue and / or organ tissue; to electrophysiology mapping and ablation catheters for monitoring and selectively altering physiologic conduction pathways; and, wherein said electrodes, lead assemblies and catheters optionally include fluid irrigation conduit(s) for providing therapeutic and / or performance enhancing materials to adjacent biological tissue, and wherein each said device is coupled to or incorporates nanostructure or materials therein. The present invention also provides methods for fabricating, deploying, and operating such medical devices.

A rechargeable battery or cell is disclosed in which the electrode active material consists of at least one nonmetallic compound or salt of the electropositive species on which the cell is based, and the electrolyte or electrolyte solvent consists predominantly of a halogen-bearing or chalcogen-bearing covalent compound such as SOCl2 or SO2Cl2. Also disclosed are cell component materials which include electrodes that consist primarily of salts of the cell electropositive species and chemically compatible electrolytes. These latter electrolytes include several newly discovered ambient temperature molten salt systems based on the AlCl3-PCl5 binary and the AlCl3-PCl5-PCl3 ternaries.

The present invention relates generally to medical devices; in particular and without limitation, to unique electrodes and / or electrical lead assemblies for stimulating cardiac tissue, muscle tissue, neurological tissue, brain tissue and / or organ tissue; to electrophysiology mapping and ablation catheters for monitoring and selectively altering physiologic conduction pathways; and, wherein said electrodes, lead assemblies and catheters optionally include fluid irrigation conduit(s) for providing therapeutic and / or performance enhancing materials to adjacent biological tissue, and wherein each said device is coupled to or incorporates nanostructure or materials therein. The present invention also provides methods for fabricating, deploying, and operating such medical devices.

The invention relates to a low-temperature fuel cell, concretely a gas diffusion layer for low-temperature fuel cell and the preparing method thereof, where the gas diffusion layer is composed of substrate layer and microporous laye, and the microporous layer is mixed of two or more conductive carbon materials. And the preparing method: taking and mixing two or more conductive carbon materials in proportion into composite conductive material, uniformly diffusing the composite condutive material and hydrophobic agent in solvent to form plup; uniformly arranging the pulp on one or two sides of a hydrophobic processed porous conductive substrate; finally forming the gas diffusion layer by thermal treatment. Because of preparing microporous layer by compositive conductive material, it forms a double-function hole structure beneficial to reacting gas transmission and liquid water transmission, improving battery performances.

To form a layer separating two volumes of aqueous solution, there is used an apparatus comprising elements defining a chamber, the elements including a body of non-conductive material having formed therein at least one recess opening into the chamber, the recess containing an electrode. A pre-treatment coating of a hydrophobic fluid is applied to the body across the recess. Aqueous solution, having amphiphilic molecules added thereto, is flowed across the body to cover the recess so that aqueous solution is introduced into the recess from the chamber and a layer of the amphiphilic molecules forms across the recess separating a volume of aqueous solution introduced into the recess from the remaining volume of aqueous solution.

Unique electrodes and / or electrical lead assemblies are provided for stimulating cardiac tissue, muscle tissue, neurological tissue, brain tissue and / or organ tissue; to electrophysiology mapping and ablation catheters for monitoring and selectively altering physiologic conduction pathways. The electrodes, lead assemblies and catheters optionally include fluid irrigation conduit(s) for providing therapeutic and / or performance enhancing materials to adjacent biological tissue. Each device is coupled to or incorporates nanotube structures or materials therein. Methods for fabricating, deploying, and operating such medical devices are also provided.

An improved non-aqueous electrolyte cell according to this invention includes a negative electrode which is a composite sintered body of a carbonaceous sintered material retained on an expanded metal mesh collector. The expanded metal mesh has a sheet thickness T, a mesh long width center distance LW, a mesh short width center distance SW, a mesh long width maximum opening, a; and a mesh short width maximum opening, b, all carefully specified to obey predetermined conditions in order to provide improved secondary cells having high energy density. The expanded metal mesh collector has a specified configuration to prevent carbon layer cracking and / or separation of the carbon layer, caused by shrinkage of the carbon layer on sintering or by expansion / shrinkage of the carbon layer during charging and discharging, to secure stable cell characteristics.

A positive active material including a compound expressed by a general formula LimMxM′yM″zO2 (here, M designates at least one kind of element selected from Co, Ni and Mn, M′ designates at least one kind of element selected from Al, Cr, V, Fe, Cu, Zn, Sn, Ti, Mg, Sr, B, Ga, In, Si and Ge, and M″ designates at least one kind of element selected from Mg, Ca, B and Ga. Further, x is designated by an expression of 0.9≦x<1, y is indicated by an expression of 0.001≦y≦0.5, z is indicated by an expression of 0≦z≦0.5, and m is indicated by an expression of 0.5≦m) and lithium manganese oxide expressed by a general formula LisMn2-tMatO4 (here, the value of s is expressed by 0.9≦s, the value of t is located within a range expressed by 0.01≦t≦0.5, and Ma indicates one or a plurality of elements between Fe, Co, Ni, Cu, Zn, Al, Sn, Cr, V, Ti, Mg, Ca, Sr, B, Ga, In, Si and Ge) are included, so that both a large capacity and the suppression of the rise of temperature of a battery upon overcharging operation are achieved.

There is provided a lithium ion secondary battery excellent in cycle characteristics in which the conductivity of an electrode using a graphite material which is less deformed and oriented by pressurization is improved. A negative electrode mixture which includes at least a negative electrode active material comprising graphite as a main component, a binder, and a conductive aid has a ratio of a peak intensity of a (002) plane to a peak intensity of a (110) plane in an X-ray diffraction spectrum of 30 or more and 70 or less, the spectrum being measured after the negative electrode mixture is pressed at 98 MPa (1000 kgf / cm2), and the conductive aid includes carbon black having a DBP absorption (cm3 / 100 g) of 250 or more and 500 or less.

The invention relates to a fuel battery, in particular to a gas diffusing layer and the preparation for the fuel battery; the gas diffusing layer consists of basic bottom layer and a micro-hole layer, which is made by fabricating the micro-hole constructed by a water repellent agent / a composite powder body of electric conduction copper material at one side or two sides of a porous electric conduction basic bottom processed by a hydrophobic water; the water repellent agent / the composite powder body of electric conduction copper material is made by a microwave dielectric heating technology; because of the favorable water repellent performance and the grain diameter structure therefore, the gas diffusing layer to be fabricated has a strong and even water repellent performance and a suitable hole structure, so that the favorable mass transfer capability of the gas diffusing layer can be assured. The fuel battery assembled by the invention can show a better battery output performance, and is particularly suitable to be used in the fuel battery where the air is used as oxidizer with a strong practicality value.

The invention belongs to the electrode preparation of fuel cells and aims to provide a microbial fuel cell air cathode easy to perform scale preparation, and a preparation method thereof. The collector body material of the air cathode is a three-dimensional porous material foam nickel sheet; the two sides of the foam nickel are respectively coated with a diffusion layer and a catalyst layer, wherein the diffusion layer consists of an inner mixed carbon basic layer and an outer polytetrafluoroethylene layer; and the mixed carbon basic layer comprises nano-scale activated carbon, conductive carbon and polytetrafluoroethylene serving as an adhesive; and the catalyst layer comprises micron-scale activated carbon, conductive carbon, isopropanol and polytetrafluoroethylene serving as the adhesive. The three-dimensional collector body material adopted by the invention is the foam nickel which has lower price than that of a carbon cloth and a stainless steel mesh, so that the manufacture costof a cell is further reduced; a catalyst is uniformly distributed in a three-dimensional network of a collector body, so that the conductivity of the electrode catalyst layer and the performance of the electrode are improved; the electrode and the cell have high stability; and the cathode has a simple manufacturing process and is easy to enlarge.

The process of preparing active carbon with great specific surface area includes the steps of stoving and crushing petroleum coke as material, mixing with KOH in certain ratio, heating and maintaining temperature in no-oxygen environment, cooling and washing with deionized water to neutrality. The process of making one kind of super capacitor includes mixing the active carbon powder possessing great specific surface area with adhesive, conducting graphite powder and dispersant in certain proportion, painting the mixture to foamed nickel, stoving, rolling into electrode sheets, adding diaphragm of modified non-woven fabric between adjacent electrode sheets, connected electrode sheets in parallel and setting inside a casing, and filling with electrolyte. The active carbon of the present invention has specific surface area as high as 2000-3000 sq m / g and medium pore rate not lower than 50 %, and is used as material for super capacitor with high performance / cost ratio and other advantages.

The durability of a fuel cell having a polymer electrolyte membrane with an anode on one surface and an oxygen-reducing cathode on the other surface is improved by substituting electrically conductive titanium carbide or titanium nitride particles for carbon particles as oxygen-reducing and hydrogen-oxidizing catalyst supports. For example nanosize platinum particles deposited on nanosize titanium carbide or titanium nitride support particles provide good oxygen reduction capability and are corrosion resistant in an acid environment. It is preferred that the catalyst-on-titanium carbide (nitride) particles be mixed with non-catalyst-bearing carbon in the electrode material for improved electrode performance,

An activated ferroelectrode characterizes in mixing an Al-Sn-Ga alloy in it among which, Al is 0-10% of its weight, Sn is 0.2%-5% and Ga is 0.01%-0.75%. Advantages: 1. The ferroelectrode can be activated not adding harmful heavy metals (Hg, Cd and Pb etc.) and has long circulation life, 2. it can discharge large current and is not passivated, 3. High potential, 4. High usability of the active material is used to make high-energy batteries, 5. Self-discharge is suppressed to reduce 30% per month, one time lower than of traditional ones, 6. Simple process technology at low cost. Al addition not only increases surface of its ratio, but also suppresses the self discharge.

The present invention relates to a method for cleaning material surface of organic substance, dust and steam pollution by utilizing microwave to produce UV-ray / ozone or oxygen plasma. Said method is suitable for cleaning surface of insulator and semiconductor material, specially is suitable for cleaning surface of conductive glass. Said invention can utilize general microwave and make it into theequipment capable of producing microwave ozone / oxygen plasma treatment. Said equipment also can be used for making disinfection and removing organic abnormal smell, etc.

The invention belongs to the technical field of photoelectron and particularly relates to an organic electroluminescence device for reducing patterning graphene electrodes based on laser and a manufacturing method for the organic electroluminescence device. The organic electroluminescence device consists of a substrate, a gold electrode, the micron-dimension patterning graphene electrodes, an organic function layer and a cathode in sequence, wherein the gold electrode serves as an extraction electrode and is in a channel structure, the micron-dimension patterning graphene electrodes are lapped on the gold electrode at the two sides of each channel, and the micron-dimension patterning graphene electrodes are prepared by a laser write-through machining system capable of realizing laser point-by-point scanning. The obtained graphene electrodes are lower in the surface roughness and smoother in the surface, and therefore, the bottom-emission organic electroluminescence device prepared by the electrodes are higher in the degree of light-emitting homogeneity. The organic electroluminescence device and the manufacturing method break through the conventional concept for manufacturing the original large-area devices, the areas of the electrodes are reduced to the micron dimension, and patterns are led into the electrodes, so that the light-emitting area of the device is in a miniaturized pattern structure, thereby combining the organic electroluminescence device and the laser micro-nanomachining skillfully.

A remediation method and system is disclosed. A plurality of conductors is installed into the subsurface to introduce electrical current to produce heat in the subsurface. One or more agents are released into the subsurface to cause or accelerate the decomposition of one or more pre-existing halogenated organic compounds and release halogen ions, improving electrode performance.

The invention discloses a preparation method of a nano tourmaline modified dust removal filter material, which belongs to the technical field of high-temperature smoke dust removal. The preparation method comprises the following steps: carrying out heat treatment for nano tourmaline powder; weighing sodium hexametaphosphate and sodium polyacrylate, and mixing the sodium hexametaphosphate and sodium polyacrylate with water; weighing nano tourmaline powder, adding water, and mixing with PTFE emulsion; adding the sodium hexametaphosphate and sodium polyacrylate into a mixed solution of the nano tourmaline powder and PTFE emulsion, and obtaining a nano tourmaline treatment solution; soaking a filter material test sample in the nano tourmaline treatment solution, and obtaining a nano tourmaline filter material; and polarizing the nano tourmaline filter material by virtue of electrets, and obtaining the nano tourmaline modified dust removal filter material. By adopting the preparation method, not only is electrets performance high, small dust can be trapped, the dust filter efficiency can be improved, the dust removing rate can be increased, and the equipment resistance is reduced.

The invention discloses a composite cathode material for medium and low-temperature proton-conductive solid oxide fuel cells, and belongs to the field of fuel cells. The composite cathode material is characterized in that BaCo<0.7>Fe<0.22>Nb<0.08>O<3-delta> with high oxygen ionic conductivity and high electronic conductivity and BaZr<0.1>Ce<0.7>Y<0.1>Yb<0.1>O<3-delta> with high proton conductivity are composited with each other to manufacture the novel cathode material, a chemical formula of the novel cathode material is BaCo<0.7>Fe<0.22>Nb<0.08>O<3-delta>-BaZr<0.1>Ce<0.7>Y<0.1>Yb<0.1>O<3-delta>, and a ratio of the phase BaCo<0.7>Fe<0.22>Nb<0.08>O<3-delta> to the phase BaZr<0.1>Ce<0.7>Y<0.1>Yb<0.1>O<3-delta> is changeable. The composite cathode material can be used for the medium and low-temperature proton-conductive solid oxide fuel cells. The composite cathode material has the advantages that after the BaCo<0.7>Fe<0.22>Nb<0.08>O<3-delta> and the BaZr<0.1>Ce<0.7>Y<0.1>Yb<0.1>O<3-delta> are composited, the cathode material has oxygen ionic conductivity, proton conductivity and electronic conductivity, a three-phase interface is expanded, the composite cathode material is excellent in electrode performance, the two phases of the composite cathode material are excellent in chemical compatibility and stable in performance, the cathode material is good in electro-catalysis performance owing to the presence of Co in the phase BaCo<0.7>Fe<0.22>Nb<0.08>O<3-delta>, interface resistance of each cell can be reduced, and the working performance of each cell can be improved.

The invention provides an air cathode. The air cathode comprises a catalyst layer containing nitrogen-doped graphene, and a diffusion layer. The nitrogen-doped graphene provides a catalyst layer with good catalysis performances for the air cathode. The air cathode can be prepared by simple and convenient processes. The catalyst layer can be roll-molded without a binder so that electrode performances of the air cathode can be improved.

A conductive additive for the positive nickel electrode for electrochemical cells which provides increased performance by suppressing an oxygen evolution reaction occurring parallel to the oxidation of nickel hydroxide, increasing conductivity of the electrode and / or consuming oxygen produced as a result of the oxygen evolution reaction.

The invention discloses an electrochemical industrial titanium anode with oxide seed layer, which is characterized by the following: depositing to cover oxide seed layer on the titanium base of titanium anode; coating subsequent coating layer on the exterior layer of oxide seed layer.

The invention discloses a ferrite-modified modified carbon fiber cloth electrode, a preparation method and an application thereof, comprising the following steps: 1) preparing the modified carbon fiber cloth; 2) preparing that modified carbon fiber cloth electrochemical cathode modified by the ferrite material. The invention also discloses the modified carbon fiber cloth electrode modified by theferrite material and the application thereof. The ferrite-modified modified carbon fiber cloth electrochemical cathode can be used in electrochemical / ozone coupled water treatment system. As that rawmaterials of the preparation method are convenient to obtain, the preparation process is simple, the cost is low, the catalytic activity is high, the electrode performance is superior, and the preparation method is a water treatment technology with low energy consumption, high efficiency and complete mineralization of pollutant. The ferrite-modified modified carbon fiber cloth electrochemical cathode prepared by the invention has broad application prospect in the degradation of persistent organic pollutants (POPs) in the circulating electric filtration system.

The invention discloses a method for preparing a graphene / polyaniline composite film electrode. The method comprises the following steps: adding aniline in hydrochloric acid, and stirring to obtain a product A; adding ammonium persulfate in the hydrochloric acid, and stirring to obtain a product B; mixing the product A with the product B, stirring, filtering, cleaning through distilled water and alcohol, and drying a sample obtained by filtering to obtain a product C; adding the product C in deionized water, and carrying out an ultrasonic oscillating treatment until a homogeneous polyaniline aqueous solution is obtained, namely, a product D; adding graphite oxide in the product D, and carrying out the ultrasonic oscillating treatment to obtain a product E; stewing the product E to obtain a product F; depositing the product F on a flexible plastic film, and drying to obtain a product G; soaking the product G in a hydrogen iodide solution, reducing, and cleaning to obtain a product H; soaking the product H in a hydrochloric acid solution, and drying to obtain a product I. The composite film of graphene / polyaniline fibers prepared by the method disclosed by the invention can be directly used as an electrode material of a flexible film super capacitor, and the method is simple to operate, short in time consumption, little in material consumption and is environmental friendly.

The invention discloses a preparation method of a voltage-controlled varactor made of transparent bismuth magnesium niobate thin films. The preparation method comprises following steps: Bi1.5MgNb1.5 O7 target material is prepared by solid state sintering method, wherein the firing temperature is 1150 to 1180 DEG C; a clean and dry indium tin oxid glass substrate is placed on a magnetron sputtering sample stage, Ar and O2 are used as sputtering gases, the Bi1.5MgNb1.5 O7 thin films are obtained by deposition, and then the Bi1.5MgNb1.5 O7 thin films are added into a furnace in oxygen atmosphere for post-annealing treatment; and metal electrodes are prepared on the Bi1.5MgNb1.5 O7 thin films by using mask version. Transparency of the varactor is high; tunability is moderate, device stability is high, preparation technologies are simple, electrode performances are excellent, no heavy metal poisoning or pollution is caused in preparation processes, and application prospect is promising.

A catalyst slurry for producing membrane electrode of fuel battery contains 1-40%wt solid catalyst particles, 1-40%wt macromolecule polyester conductor, 0.1-50%wt water, 1-50%wt alcohol, and 1-90%wt organic acid. And the relative preparation comprises that preparing the disperser of macromolecule polyester atom conductor and preparing catalyst slurry. The electrode made from the inventive catalyst slurry has better property than prior art, with easy preparation, saved time, saved force, and low energy consumption.

A conductive additive for the positive nickel electrode for electrochemical cells which provides increased performance by suppressing an oxygen evolution reaction occurring parallel to the oxidation of nickel hydroxide, increasing conductivity of the electrode and / or consuming oxygen produced as a result of the oxygen evolution reaction.

The invention relates to a three-dimensional porous graphene electrode and a preparation method thereof. The preparation method includes following steps: (1) dispersing a certain quantity of graphite oxide powder in deionized water, performing ultrasound stripping to prepare homogeneous graphene oxide water dispersion liquid; (2) adding a hydrazine hydrate solution to the graphene oxide water dispersion liquid, successively performing a high-temperature short-time and a room-temperature long-time polymerization reactions to obtain a water-containing graphene polymer; (3) freeze-drying the water-containing graphene polymer to obtain three-dimensional porous graphene; and (4) cutting the three-dimensional porous graphene to obtain the electrode or directly employing the three-dimensional porous graphene as the electrode. In the invention, by means of the oxidation-reduction method, the polymerization reactions are carried out under a high graphene oxide concentration, so that single-layer graphene nano sheets are closed to eath other and are combined together through Van der waals force to form monolithic three-dimensional porous graphene, thereby preparing the electrode. The electrode has enough mechanical strength, is large in specific surface area and is excellent in performance.