9results about How to "Good surface conductivity" patented technology

The invention provides a lithium-mixed coated modified ternary positive electrode material as well as a preparation method and application thereof, and relates to the technical field of lithium battery raw materials. Various lithium sources are mixed according to a certain proportion to prepare a ternary positive electrode, co-doping modification is carried out through cooperation of Li3PO4 and a W / Al / Zr / Y / B-containing compound, double-layer coating modification is carried out through cooperation of the Li3PO4 and a Ti / Al-containing compound for primary coating and cooperation of an anhydrous Li compound and TiP2O7 or Ti3 (PO4) 4 for secondary coating, and a double-gradient fast ion conductor coating layer is constructed. The structural stability, the thermal stability, the first discharge capacity and efficiency, the multiplying power, the circulation and storage performance and the like of the single-crystal or polycrystal ternary positive electrode material under different voltage and power conditions are improved; the lithium-mixed multi-element composite ternary positive electrode provided by the invention has the advantages of more stable layered structure, higher safety, higher electronic conductivity, better multiplying power, high specific capacity and long cycle performance.

The invention discloses a positive electrode lithium supplement additive and a preparation method and application thereof. The positive electrode lithium supplement additive is of a coating structure, the inner layer is Li5FeO4 particles, and the coating layer is a carbon layer. The preparation method of the positive electrode lithium supplement additive comprises the following steps: 1) mixing a lithium salt and an iron salt with water to obtain a solution A; (2) carrying out mixed culture on fusarium oxysporum freeze-dried powder and the solution A to obtain a solution B, centrifuging and filtering the solution B, and drying filter residues to obtain a precursor; and 3) supplementing a lithium source B according to the molar ratio of Li to Fe elements in the precursor, mixing the supplemented lithium source B with the precursor, and calcining to obtain the positive electrode lithium supplementing additive. The positive electrode lithium supplement additive is applied to preparation of a lithium ion battery material. The lithium supplement additive prepared by the invention has good rate capability, is free of particle aggregation and overgrowth during preparation, is in full contact with other positive electrode materials in the processing process, and can significantly improve the energy density of the lithium ion battery.

This invention relates to a nickel-plated steel sheet with excellent corrosion resistance for battery casings and a method for manufacturing the same. In one specific embodiment, the nickel-plated steel sheet comprises: a base steel sheet; a nickel plating layer formed on at least one surface of the base steel sheet; and a nickel-iron diffusion layer formed between the base steel sheet and the nickel plating layer. The nickel plating layer and the nickel-iron (Ni-Fe) diffusion layer are formed by heat treatment after forming an electroplated nickel layer on the base steel sheet and a chemically plated nickel layer on at least a portion of the surface of the electroplated nickel layer. The nickel plating layer contains one or more vacancy elements selected from phosphorus (P), boron (B), tungsten (W), cobalt (Co), molybdenum (Mo), and copper (Cu) on its surface.

The present invention provides a method for preparing a positive electrode material for a lithium ion battery, comprising the following steps: 0.6 Mn 0.4 The (OH)2 precursor is mixed with lithium carbonate and then ground and sintered to obtain LiNi 0.6 Mn 0.4 O2; using anhydrous ethanol as solvent, polyvinyl pyrrolidone, prepared LiNi 0.6 Mn 0.4 O2 and cobalt nitrate are mixed and stirred until the ethanol evaporates naturally; the mixed material is sintered at 500℃~600℃ for 3~7h to obtain surface-modified LiNi 0.6 Mn 0.4 O2, and the lithium-ion battery positive electrode material is obtained. The present invention adopts a relatively simple preparation method to prepare the low-cost cobalt-free positive electrode material LiNi 0.6 Mn 0.4 O2 is used for surface modification to produce positive electrode materials with high capacity and good cycle performance. The electrochemical performance of the obtained materials is greatly improved and has great practical value.

The invention discloses an aluminum alloy surface conductive oxide film preparation method which comprises the following steps: degreasing: degreasing an aluminum alloy in a degreasing fluid, and cleaning after degreasing; deoxidizing treatment: treating the degreased and cleaned aluminum alloy in deoxidizing liquid to remove oxides on the surface of the aluminum alloy, and then cleaning; brightness treatment is conducted, specifically, the cleaned aluminum alloy subjected to deoxidation treatment is subjected to brightness treatment at the room temperature, and cleaning is conducted after brightness treatment is conducted; hard conductive anodic oxidation is conducted, specifically, hard conductive anodic oxidation treatment is conducted on the cleaned aluminum alloy subjected to brightening in oxidation liquid, an oxidation film is formed, cleaning is conducted after hard conductive anodic oxidation treatment is conducted, and drying treatment is conducted; and sealing is conducted, specifically, the dried aluminum alloy obtained after hard conductive anodic oxidation is subjected to sealing treatment in sealing liquid, drying treatment is conducted, and preparation of the hard conductive anodic oxide film is completed. The surface conductivity of the aluminum alloy is effectively improved, the strength and toughness are further improved, the preparation cost is effectively reduced, and the preparation efficiency is improved.

The invention discloses a composite current collector system, and relates to the technical field of new materials. The device comprises a supporting layer, a first copper layer, a metal transition layer, a second copper layer, an electroplating copper layer and a protection layer, the supporting layer, the first copper layer, the metal transition layer, the second copper layer, the electroplating copper layer and the protection layer are arranged in sequence; the metal transition layer is located between the first copper layer and the second copper layer. The product yield of the composite current collector is improved.

A silicon-based negative electrode composite material and a lithium secondary battery. The silicon-based negative electrode composite material is a composite material composed of silicon-based particles and a carbon coating layer coated on the surface of the silicon-based particles; the silicon-based particles in a lithium insertion state are a composite material containing a LixMy Siz alloy, wherein 0<x<25, 0<y<5, and 0<z<6, and M is one or more of Ni, Cu, Zn, Al, Na, Mg, Au, N, and P; the silicon-based particles have an average particle diameter (D50) of 0.1-40 pm and a specific surface area of 0.5 m2 / g-40 m2 / g; after lithium insertion, the LixMySiz alloy is diffusely distributed in the whole silicon-based particles and has the crystallite dimension of 0.5.

The present invention discloses a heat dissipation conductive shielding buffer foam, comprising a buffer foam layer and a conductive film layer arranged on one side or both sides of the buffer foam layer, and the conductive film layer is attached to the surface of the buffer foam layer by sputtering layer by layer; the heat dissipation conductive shielding buffer foam has a thickness range of 0.06 mm to 1 mm and a density range of 0.03 g / cm 3 ~0.8g / cm 3 The maximum compression ratio is ≥60%, the maximum pore size in each direction does not exceed 80μm, and the foam opening rate is ≤30%; the buffer foam layer contains fibrous thermal conductive fillers to improve the thermal conductivity of the buffer foam layer, and the thermal conductivity coefficient is within 1w / m·k~10w / m·k. The heat dissipation conductive shielding buffer foam of the present invention is soft and has a higher compression ratio. It can better adapt to the concave and convex gap scenes inside electronic equipment, fill the interface gap, reduce the contact thermal resistance, and combine with the addition of thermal conductive fillers to improve the thermal conductivity effect; at the same time, the conductive film layer has good surface conductivity, so that the material can be used as a shielding electromagnetic wave material.

The invention belongs to the technical field of electrochemistry, and provides a high-sensitivity NO oxidation catalytic electrode and a preparation method and application thereof. The NO oxidation catalytic electrode provided by the invention comprises a catalytic layer and a catalytic protective layer, main raw material components of the catalytic layer comprise metal phthalocyanine, graphite and a binder, main raw material components of the catalytic protective layer comprise a hydrophilic porous carbon material and a perfluorosulfonic acid type polymer, and metal phthalocyanine and graphite are matched with each other, so that the catalytic performance of the catalytic electrode is improved. According to the present invention, the electrode has characteristics of good NO oxidation catalytic activity, good conductivity, good chemical stability, wide linear range and cost reduction, and is provided with the catalytic protection layer so as to effectively isolate the generation of the side reaction, improve the surface conductivity, reduce the background current generated by the electrode, and do not affect the response speed and the response time.