86results about How to "Reduce interface contact resistance" patented technology

The present invention discloses a composite solid electrolyte and a preparation method thereof. The composite solid electrolyte comprises an inorganic solid electrolyte and a polymer electrolyte. Theinorganic solid electrolyte is of a porous structure; the porosity of the inorganic solid electrolyte is less than 30%; and the inside of the inorganic solid electrolyte is provided with a continuouslithium ion channel composed of particles communicating with each other. The polymer electrolyte is arranged between the inorganic solid electrolytes for filling gaps, and account for less than 30% ofthe composite solid electrolyte. The porous inorganic solid electrolyte of the invention constitutes a main frame structure, which has a porosity below 30% and is the main bearer of lithium ion transportation. The polymer electrolyte is a gap filling material, which is mainly used for improving the overall flexibility of the composite solid electrolyte and reducing the impedance of the solid-solid contact interface between the positive electrode plate and negative electrode plate.

A nitridation treated stainless steel article (such as a bipolar plate for a proton exchange membrane fuel cell) having lower interfacial contact electrical resistance and better corrosion resistance than an untreated stainless steel article is disclosed. The treated stainless steel article has a surface layer including nitrogen-modified chromium-base oxide and precipitates of chromium nitride formed during nitridation wherein oxygen is present in the surface layer at a greater concentration than nitrogen. The surface layer may further include precipitates of titanium nitride and/or aluminum oxide. The surface layer in the treated article is chemically heterogeneous surface rather than a uniform or semi-uniform surface layer exclusively rich in chromium, titanium or aluminum. The precipitates of titanium nitride and/or aluminum oxide are formed by the nitriding treatment wherein titanium and/or aluminum in the stainless steel are segregated to the surface layer in forms that exhibit a low contact resistance and good corrosion resistance.

The invention provides an iron-based sulfide electrode material, a preparation method and application in a solid state battery, and belongs to the technical field of secondary lithium batteries. The iron-based sulfide electrode material which is based on conversion reaction is selected from one or more of ferrous sulfide, ferriferous sulfide and hepta-ferous octa-sulfide. The preparation method of the iron-based sulfide electrode material has the advantages of being simple and short in time.

The invention provides a lithium battery separator in a gel-like structure, a preparation method thereof and an all-solid-state lithium battery The lithium battery separator includes upper and lower surface layers, an intermediate three-dimensional channel layer and ion conductive functional materials filled in the surface layers and the three-dimensional channel layer, wherein the surface layer has a nano-scale channel structure, and the three-dimensional channel layer has a high porosity and a micron-sized pore structure. The ion conductive functional materials are a mixture of polymer resinand lithium salt. According to the invention, the electrolyte retention capacity of the separator can be improved on the basis of maintaining relatively high ion conductivity through combining the surface layers on the upper and lower surfaces of the high-porosity three-dimensional pore layer, thereby ensuring that the electrolyte does not flow significantly under severe mechanical motion and maintains a gel-like state. The invention is expected to be applied to an all-solid lithium ion battery, and the preparation method has low cost and a simple process, and is convenient for continuous production.

A semiconductor device which includes: a semiconductor layer formed over an insulating layer over a semiconductor substrate; a gate electrode disposed over the semiconductor layer through a gate insulator; a sidewall insulator formed along the gate insulating film and a sidewall of the gate electrode; a source/drain layer including an alloy layer whose bottom surface is in contact with the insulating layer; and an impurity-doped layer which is segregated in a self-aligned manner in an interface between the alloy layer and the semiconductor layer and has a face for junction with a channel region formed along a crystal orientation plane of the semiconductor layer.

The invention relates to a method for preparing a high-performance slab solid oxide fuel single battery. The preparation method comprises: a support electrode diaphragm and an electrolyte diaphragm are overlapped and are subjected to hot pressing under a vacuum condition so as to form a first complex diaphragm; a non-support electrode diaphragm and a complex diaphragm are overlapped and then are subjected to hot pressing so as to form a second complex diaphragm; one side of an electrolyte of the first complex diaphragm and one side of the non-support electrode of the second complex diaphragm are overlapped in a contact manner so as to form a single battery blank; the single battery blank is sintered so as to manufacture a single battery, wherein the complex diaphragm is burnt out during the sintering process, a anode diaphragm is formed by the support electrode diaphragm and a cathode diaphragm is formed by the non-support electrode diaphragm, or the cathode diaphragm is formed by the support electrode diaphragm and the anode diaphragm is formed by the non-support electrode diaphragm; the complex diaphragm is prepared from substances which can be burnt out at a temperature of 200-1450 DEG C.

The invention discloses a semiconductor device and a forming method thereof. The forming method of the semiconductor device comprises the following steps: providing a substrate, wherein a first conductive layer is arranged on the surface of the substrate, a sacrificial layer is arranged on the surface of the first conductive layer, a mask layer is arranged on the surface of the sacrificial layer, and the mask layer is exposed on part of the surface of the sacrificial layer; taking the mask layer as a mask, etching the sacrificial layer until the first conductive layer is exposed, and forming a first opening and a second opening in the sacrificial layer; forming conductive films on the surface of the mask layer and on the side walls and bottom surfaces of the first opening and the second opening; forming dielectric layers full of the first opening and the second opening on the surfaces of the conductive films; removing part of conductive films on the surface of the mask layer so as to pattern the conductive films after the dielectric layers are formed, forming a first plug in the first opening, forming a second plug in the second opening, and forming a second conductive layer on the surface of the mask layer, wherein the second plug and the second conductive layer are in electrical open circuit; and electrically connecting the second conductive layer with the first plug. Therefore, the performance of the formed semiconductor device is stable and good.

The invention relates to a method for preparing a lead dioxide electrode with a porous matrix. The method includes the following steps that a porous material serves as the matrix, the matrix is subjected to surface treatment, and a mud-crack-free middle coating and a lead dioxide surface layer are prepared on the treated surface of the matrix sequentially. The method has the beneficial effects that the lead dioxide electrode with the porous matrix is of a unique three-dimensional internal structure, and the middle layer can be closely combined with the porous matrix as a solid solution or in other forms, and forms a compact mud-crack-free covering layer, so that the matrix is effectively protected, and the service life of the electrode is greatly prolonged; an active layer and the matrix can be firmly combined, and high bonding force and high anti-stripping capacity are achieved; the special internal meshed communication mechanism of the porous matrix material improves the overall performance of the electrode and plays a significant role in assisting in electrocatalytic oxidation; and the prepared lead dioxide electrode with the porous matrix has the advantages of high oxygen evolution potential, good catalytic activity, large electrode specific surface area, and small interface resistance and internal stress.

The invention relates to the technical field of fuel cells, and particularly relates to a fuel cell assembly and a preparation method thereof, which can effectively reduce the interface resistance between a bipolar plate and a gas diffusion layer and improve the overall power density of a stack. The embodiment of the invention provides the fuel cell assembly, comprising the bipolar plate and the gas diffusion layer arranged on one side of the bipolar plate, wherein the gas diffusion layer and an interface of the bipolar plate are combined by forming a compound or a solid solution. The embodiment of the invention is used for the preparation and assembly of fuel cells.

The invention provides an additive applied to a battery electrolyte, which has a structure as shown in the following (I), and a substituent group is shown in the specification. The invention also provides an electrolyte and a battery using the additive. The additive provided by the invention can effectively reduce the interface impedance and charge transfer impedance between graphite, silicon carbon and other negative electrode materials and an electrolyte, thereby effectively improving the cycle stability and rate capability of the negative electrode materials.

The invention provides a membrane electrode assembly for a solid polymer electrolyte electrolytic cell and a preparation method. The membrane electrode assembly comprises a solid polymer electrolyte membrane, a cathode catalyst coating layer and an anode catalyst coating layer which are arranged on the two sides of the solid polymer electrolyte membrane, and a cathode gas diffusion layer and an anode gas diffusion layer which are arranged on the two sides of the cathode catalyst coating layer and the two sides of the anode catalyst coating layer respectively; the above components are combinedtogether through a certain process to form the membrane electrode assembly. The anode catalyst is a core-shell structure catalyst of which the interior is ruthenium oxide and the exterior is iridium oxide; the anode gas diffusion layer is a porous titanium plate or foamed titanium and contains the core-shell structure catalyst; and the certain process combination is a hot-pressing process formingthe assembly. The membrane electrode assembly provided by the invention can realize low-cost, high-activity and long-life SPE electrolytic cell application.

The invention discloses a solid electrolyte and a preparation method thereof. The solid electrolyte comprises the following components: a ceramic-based ion conductor, a polymer ion conductor and a lithium salt, wherein the polymer ion conductor includes a base polymer and a dopant. The invention also discloses a solid-state battery. The components of the solid electrolyte are improved and optimized, and the ceramic-based ion conductor, the polymer ion conductor and the lithium salt are combined for use, so the ionic conductivity of the solid electrolyte is improved, and the solid electrolyte has relatively small interface impedance and good mechanical properties; in addition, good stability is achieved. By adding a trace amount of electrolyte into the positive electrode plate, the interface contact impedance can be effectively reduced, and meanwhile, the diffusion rate of lithium ions in a solid phase is increased. The prepared solid-state battery is excellent in performance, the maximum working voltage is greater than 4V, the safety performance is good, and the solid-state battery has a very good application prospect.

The invention discloses an interface wetting agent and a preparation method and application thereof. The interface wetting agent comprises a plastic crystal compound, inorganic lithium salt, a first additive and a second additive, wherein the first additive comprises at least one of ethyl carbonate/propylene ester, dimethyl carbonate/ethyl carbonate, ethyl methyl carbonate, trifluoropropenyl esterand lithium difluorophosphate; the second additive comprises at least one from lithium carbonate, trifluoromethyl phosphorous acid, methyl chloroformate, bromo-butyrolactone, fluoroacetate ethane, fluoroethylene carbonate, vinylene carbonate, vinylethylene carbonate, vinyl acetate, styrene carbonate, ethyl aminocarbonate, methyl aminocarbonate, 1, 3-dioxolane, 1, 4-dioxane, 1, 2-bis (cyanoethoxy)ethane, ethylene sulfate and dimethyl sulfite. The interface wetting agent has the advantages of high lithium ion conductivity and better electrochemical stability, the interface resistance of the solid-state battery can be effectively reduced, and the multiplying power and the cycle performance of the solid-state battery are improved.

The invention discloses a preparation method of a high-performance nickel-cobalt phosphide hydrogen evolution catalyst and an efficient water electrolysis hydrogen evolution research, and belongs to the technical field of water electrolysis hydrogen production and new energy. The preparation method is characterized by comprising the steps of: phosphorizing foam metal substrates such as foam cobalt and foam nickel through a chemical vapor deposition method to prepare a non-noble metal phosphide Co2P/Ni2P porous conductive skeleton; and soaking the conductive skeleton in a solution of cobalt, nickel and other metal salts, and drying and phosphorizing the conductive skeleton again to obtain the non-noble metal phosphide hydrogen evolution catalyst with a nano-porous structure which shows excellent catalytic hydrogen evolution activity and stability in neutral and alkaline environments. The unique structural design greatly exposes the active sites of the metal phosphide, reduces the contact resistance among the components of the material, contributes to hydrogen adsorption and release and accelerates charge transfer among different component interfaces, thereby greatly reducing the overpotential of hydrogen reaction and assisting the development of the hydrogen energy industry and hydrogen fuel cells in China.

The invention discloses a high-toughness gel electrolyte. Specifically, an original weak PAA-Fe<3+>/CS hydrogel is soaked in a salt solution by utilizing a Hofmeister effect, and the toughness-enhanced PAA-Fe<3+>/CS hydrogel electrolyte with excellent mechanical properties is prepared. Ammonium chloride and zinc chloride are used as ionic conductors in an electrolyte, polyacrylic acid is used as a polymer skeleton, ammonium persulfate is used as an initiator, in the presence of chitosan and ferric chloride, PAA-Fe<3+>/CS hydrogel is prepared through one-pot free radical polymerization, after a PAA-Fe<3+> network is constructed, chain entanglement of chitosan is induced by adopting a soaking strategy, and the high-toughness electrolyte for an zinc-air battery is obtained. The electrolyte has high toughness, can be assembled into a battery to avoid relative displacement or separation caused by bending strain, enhances interface contact to promote electrochemical kinetics, and shows good working time and durability.

The invention discloses a transition metal/nitrogen co-doped carbon nanotube and mesoporous carbon shell composite counter electrode material for a dye-sensitized solar cell. The transition metal/nitrogen co-doped carbon nanotube and mesoporous carbon shell composite counter electrode material is composed of a transition metal/nitrogen co-doped carbon nanotube and a mesoporous carbon shell layer, the outer layer of the metal/nitrogen co-doped carbon nanotube is coated with the mesoporous carbon shell layer to form a tube-in-tube carbon special-shaped interface structure, the thickness of the mesoporous carbon shell layer in the composite counter electrode material is 50-200 nanometers, and the size of a mesoporous channel is 3-6 nanometers. The transition metal/nitrogen co-doped carbon nanotube-mesoporous carbon shell composite counter electrode material with specific chemical components and morphological structure provided by the invention shows the application advantages of lower charge transfer impedance, higher photoelectric conversion efficiency, better electrochemical stability and the like compared with a traditional Pt counter electrode in the application of a dye-sensitized solar cell; and the preparation process is simple, the cost is low, large-scale production is easy, and commercial application of the dye-sensitized solar cell is promoted.