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148results about How to "High conductivity" patented technology

Method for uniformly and controllably coating conducting carbon layer at surface of LiFePO4 granule surface

The invention relates to a method for coating an even and controllable deposit carbon layer on the surface of LiFePO4 particles serving as lithium ion battery cathode materials for increasing the LiFePO4 conductivity. The method adopts the concrete preparation processes that: LiFePO4 powders are placed in a constant temperature zone of a chemical vapor deposition furnace, then the air in the furnace is fully discharged for inputting inert gases, after the temperature rises to the set level, a carbon source gas is input for covering a conductivity carbon film on the surface of the LiFePO4 particles evenly, the LiFePO4 coated with the carbon film has excellent conductivity which is increased by five orders of magnitude compared with the condition before coating. The chemical vapor deposition temperature ranges from 580 to 720DEG C, the deposition time is from 1 to 10 hours, and the volume percent of the carbon source gas is between 1 and 20 percent, and a sample deposited with carbon is cooled to the room temperature with a natural furnace and is then taken out. The method can cover the conductivity carbon film on the surface of each LiFePO4 particle evenly for increasing the conductivity of LiFePO4, and the thickness of the conductivity carbon film can be accurately controlled in the range of 2 to 50 nanometers through adjusting parameters (deposition temperature, deposition time and carbon source gas volume percent) of the chemical vapor deposition process.
Owner:INST OF METAL RESEARCH - CHINESE ACAD OF SCI

Preparation method of mineral graphene reinforced ultra-high molecular weight polyethylene double-resistant pipe

The invention relates to a preparation method of a mineral graphene reinforced ultra-high molecular weight polyethylene double-resistant pipe. The pipe is prepared from the following raw materials: 100 parts of ultra-high molecular weight polyethylene, 2-5 parts of nano-graphene sheets, 5-10 parts of a coupling agent, 0.1-1 part of a foaming agent, 0.1-1 part of a compatibilizer, 1-2 parts of a lubricating agent, 6-10 parts of a halogen-free flame retardant, 3-6 parts of an antistatic agent, 2-4 parts of a flow modifier, 1-3 parts of a nucleating agent, and the like; the graphene reinforced ultra-high molecular weight polyethylene double-resistant pipe is prepared by the processes of extruding, sizing, and the like. According to the preparation method, nano-graphene, the antistatic agent and the flame retardant are dispersed into ultra-high molecular weight polyethylene resin medium gaps by means of the coupling agent, the compatibilizer, the flow modifier, the lubricating agent, the nucleating agent, and the like; the nano-graphene sheets have significant synergistic flame retardation after being compounded with the flame retardant, and can reduce the resistivity of the pipe after being compounded with the antistatic agent. The prepared pipe has the characteristics of being light in weight, high in strength, flame-retardant, antistatic, and the like, thus being used in the operating environments such as coal mines, downhole and mines in which a great deal of gas exists.
Owner:JIUJIANG UNIVERSITY

Low-temperature silver paste for low-density HIT solar cell and preparation method thereof

The invention relates to a low-temperature silver paste for a low-density HIT solar cell, and a preparation method thereof. The low-temperature silver paste for the low-density HIT solar cell comprises low-apparent density silver powder, resin monomer, solvent, and an initiator for resin monomer curing; the weight percent of the low-apparent density silver powder in the low-temperature silver paste for the HIT solar cell is 30-90%, the weight percent of the resin monomer in the low-temperature silver paste for the HIT solar cell is 0.1-10%, and the weight percent of the curing initiator in thelow-temperature silver paste for the HIT solar cell is 0.1-5%. The-temperature silver paste disclosed by the invention has the advantages that the low-apparent density silver powder is creatively used for preparing the low-temperature silver paste for the low-density HIT solar cell, the low-temperature silver paste for the low-density HIT solar cell with low density and high conductivity is prepared by selecting the silver powder size, the morphology and apparent density under the low silver powder adding amount. The silver powder adding amount is reduced in the premise of guaranteeing the conductivity, the manufacturing cost of the low-temperature silver paste for the low-density HIT solar cell is greatly reduced, and the density of the low-temperature silver paste for a low-density HITsolar cell can be reduced a half and more by using the low-apparent density silver powder, thereby greatly reducing the consumption of the low-temperature silver paste in the manufacturing of the HIT.
Owner:苏州瑞力博新材科技有限公司
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