31results about How to "Reduce conduction resistance" patented technology

The invention discloses a novel block anion exchange membrane. A block main chain of the anion exchange membrane contains a bending unit (biphenyl fluorene) and a twisting unit (phthalazinone); according to the structure, a non-coplanar effect can be enhanced. A preparation method of the anion exchange membrane comprises the following steps of performing polycondensation on decafluorobiphenyl (slightly excessive) and bisphenol fluorine to prepare an oligomer 1; using the decafluorobiphenyl and 4-(4-hydroxyphenyl)-2,3-phthalazine-1-one to prepare an oligomer 2; polymerizing the oligomer 1 with the oligomer 2 to obtain a polymer main chain, and performing ionization treatment, membrane casting and alkali treatment on a chloromethylation main chain to obtain the anion exchange membrane. The anion exchange membrane has better chemical stability, and higher electric conductivity and resistance to swelling, and is suitable for being applied in the aspect of alkaline fuel cells.

The invention relates to an oleophylic sulfur electrode preparation method, silicone oil is penetrated into a positive porous electrode, and dried to obtain a porous oleophilic sulfur electrode, and the mass content of the silicone oil in the porous oleophilic sulfur electrode is 0.2-30%; by use of the oleophilic property of the silicone oil, an electrolyte uniformly infiltrates into the electrode, and especially lithium ion conduction in a high load sulfur electrode can be effectively achieved, so that the electrochemical performance of high load elemental sulfur can be played, and silicon oxygen bonds contained in the silicone oil can be effectively combined with lithium polysulfide in the discharge process, and self discharge phenomenon caused by dissolving and shuttling of the polysulfide can be suppressed, so that the objective of improving the lithium sulfur battery coulombic efficiency and cycle stability can be achieved.

The invention relates to a membrane electrode for a proton exchange membrane fuel cell and a preparation method of the membrane electrode. The preparation method comprises the following steps: A, spinning catalyst slurry onto a microporous layer on the surface of hydrophobic carbon paper by adopting a variable-voltage electrostatic spinning process to obtain a gas diffusion catalyst layer integrated electrode; B, assembling according to the assembly sequence of the gas diffusion catalyst layer integrated electrode, the proton exchange membrane and the gas diffusion catalyst layer integrated electrode, and after assembly, preparing the membrane electrode for the proton exchange membrane fuel cell through a hot pressing or cold pressing process. The catalyst layer is directly spun on the gas diffusion layer by means of an electrostatic spinning technology, the thickness of the catalyst layer and the loading capacity of a catalyst are reduced, the dispersity of the catalyst is improved, and a fibrous structure obtained through spinning is good in uniformity and rich and moderate in pore structure; water transmission and air mass transfer in a high-current density area of the fuel cell are improved, and the cell performance is improved.

The invention belongs to the technical field of tilia bast fiber processing and particularly relates to a processing method for improving tilia bast fiber knitting property. The processing method comprises the following specific methodssteps: performing boiling, freezing and steam and treating fluid dipping treatment on tilia bast fiber and performing temperature-change drying, ultrasonic, variable pressure and constant-temperature drying treatment. In the step of performing boiling, freezing and steam and treating fluid dipping treatment on tilia bast fiber, degradation of hemicelluloses in the tilia bast fiber is effectively inhibited; as the hemicelluloses has an adhesion effect in cell walls, the bonding strength among the tilia bast fiber is enhanced, and the toughness and the breaking resistance of the tilia bast fiber are improved; furthermore, a the color and luster degree of the tilia bast fiber is effectively improved, and sun resistance of the tilia bast fiber is enhanced. In the step of performing temperature-change drying, ultrasonic, variable pressure and constant-temperature drying treatment, conduction resistance of moisture in the tilia bast fiber is reduced, permeability of the tilia bast fiber is improved, the combining capacity between components of the treating fluid and tilia bast fiber cellulose molecules is enhanced, hygroscopicity of the tilia bast fiber is reduced, and dimensional stability of the tilia bast fiber is improved; furthermore, breeding of mould and putrefying bacteria is effectively inhibited, service life of the tilia bast fiber is prolonged, and use quality of the tilia bast fiber is improved.

A color filter is featured as adding one or multiple conductive layer above covering layer between R / G / B color filtering units on color filter to form parallel structure being connected through to each other and being set between conductive layer and electrode layer, utilizing said parallel structure to decrease transmission impedance.

The invention relates to the field of lithium ion battery electrode materials, in particular to a carbon-coated nanofiber material, a preparation method thereof and a battery. The preparation method of the carbon-coated nanofiber material comprises the following steps: dissolving metal organic salt, lithium salt, a first polymer binder and a first organic carbon source in a first organic solvent, and preparing a spinning core layer solution, wherein metal elements in the metal organic salt are Fe, Ni, Mn, Co or V; dissolving a second polymer binder and a second organic carbon source in a second organic solvent to prepare a spinning shell solution; and spinning the spinning core layer solution and the spinning shell layer solution under a preset condition by using a coaxial electrostatic spinning technology to form fibers, and sintering the fibers in an inert atmosphere. According to the method, the fiber can be subjected to in-situ carbon coating, and the electrical property of the battery is improved. The invention also provides the carbon-coated nanofiber material prepared by the preparation method and a battery comprising the material.

The invention relates to the field of electrochemical energy storage, in particular to a high-strength ultrathin integrated proton exchange membrane. Mutually perpendicular micron-sized reinforcing ribs are processed on two sides of the proton exchange membrane with excellent ion selectivity by adopting an advanced femtosecond processing or micro-nano imprinting technology, so that the reinforcingribs on the upper side and the lower side are used as supports, and the ultrathin middle layer realizes the construction of the high-strength ultrathin integrated proton exchange membrane with ion selectivity. The reinforcing ribs on the two sides of the proton exchange membrane can greatly reduce the thickness of the middle layer and ensure that the middle layer has high mechanical strength, andtherefore the internal resistance of the proton exchange membrane and the internal resistance of the whole battery can be greatly reduced on the premise that the mechanical strength and stability ofthe proton exchange membrane are ensured. According to the invention, by utilizing the characteristic of excellent ion selectivity and combining with advanced processing means which are easy for large-scale production, such as femtosecond processing or micro-nano imprinting, the preparation and batch production of the high-strength ultrathin integrated proton exchange membrane can be realized.

The invention discloses a gas diffusion layer structure of an electrochemical oxygenerator membrane electrode and a preparation method, the gas diffusion layer structure comprises a cathode gas diffusion layer and an anode gas diffusion layer, the cathode gas diffusion layer comprises a cathode conductive porous substrate layer and a cathode microporous layer arranged at the inner side of the cathode conductive porous substrate layer; the anode gas diffusion layer comprises an anode conductive porous substrate layer and an anode microporous layer arranged on the inner side of the anode conductive porous substrate layer, the anode microporous layer comprises carbon particles and a binder, and the cathode microporous layer comprises carbon particles, a binder, a water absorbent and an adsorption material. Compared with the prior art, the electrochemical oxygen generator has the advantages that the conductivity is good, the hydrophilic and hydrophobic properties of the cathode gas diffusion layer and the anode gas diffusion layer are different, the gas diffusion performance and the water management performance of the electrochemical oxygen generator are improved, the water-gas distribution performance of the cathode gas diffusion layer and the anode gas diffusion layer is optimized, the electrolysis rate of the anode side water is further improved, and the electrochemical oxygen generator is more stable. And oxygen can be stably produced under the condition of low humidity.

The present invention relates to a bridged type multi-chip package structure. It mainly includes a carrier plate, a first chip, a second chip and at least a conductive body. Said carrier plate has an upper surface and correspondent lower surface, several carrier plate contacts are positioned on upper surface of said carrier plate. The first chip has a first active surface, said first chip also has at least a first contact which is placed on first active surface of said first chip. Similarly, the second chip has a second active surface, said second active surface also has at least a second contact. Which is placed on second active surface of said second chip. The first side wall of first chip is adjacent to second side wall of second chip, and the first active surface of first chip and second active surface of second chip are placed on a common plane. The conductive body is extended on first active surface of first chip and second active surface of second chip so as to make first contact of first chip and second contact of second chip be electrically connected.

The present invention provides a preparation method of a membrane electrode. The method comprises the following steps: coating a catalyst paste on the two surfaces of an anion exchange membrane and then performing cross-linking treatment to obtain a basic film-coated electrode; placing the basic film-coated electrode between a cathode gas diffusion layer and an anode gas diffusion layer and then performing heat pressing to obtain the membrane electrode. The catalyst paste contains an anion exchange resin, and the anion exchange resin have groups capable of performing cross-linking, wherein thecomposition of the anion exchange resin is identical with the composition of the anion exchange membrane. According to the preparation method of the membrane electrode, the composition of the anion exchange membrane is identical with the composition of the anion exchange resin in a catalyst layer, and the anion exchange membrane and the anion exchange resin all have groups capable of performing cross-linking. A whole cross-linking type film-coated electrode is formed by performing cross-linking treatment on the anion exchange membrane and the catalyst layer, the prepared membrane electrode byusing a post cross-linking method has high mechanical strength, and the mass transfer resistance of OH<-> between the anode and cathode catalyst layers and the anion exchange membrane in the membraneelectrode is also reduced.