3 results about "Reducing atmosphere" patented technology

The invention discloses a composite phosphate type anode material for a lithium ion battery, and a preparation method thereof. The composite phosphate type anode material can cause the raw material containing metals, lithium and phosphorus source and/or superfine LiMPO4 and/or superfine Li5-yM'2(PO4)3 to react under inert or reducing atmosphere and high temperature to synthesize LiMPO4 and Li5-yM'2(PO4)3 composite phosphate with combined chemical bonds, and by adding a conductive agent ball grinder, the composite anode material with excellent electrochemical performance can be obtained. The composite anode material prepared by the method has the advantages of low cost, unique process method and good electrochemical performance; the industrialization is easy to achieve.

The invention discloses a metal-ceramic composite fibrous membrane tube and a preparation method thereof. The preparation method is characterized by comprising the following steps: mixing 0.2 to 1 mass percent of polyvinylpyrrolidone, 0.7 to 10 mass percent of polyether sulfone, 7 to 50 mass percent of N-methyl-1-pyrrolidone, 50 to 90 mass percent of metal with a ceramic material in a mass ratio of 3-10:1, and performing ball milling to prepare slurry; pressurizing to make the slurry extruded from a interlayer clearance of a spinning nozzle and water and/or ethanol extruded from an inner pipesimultaneously, and making the slurry enter the water and/or the ethanol to obtain a hollow tubular blank of the metal-ceramic composite fibrous membrane tube; and sintering the blank at a temperature of between 800 and 1,500 DEG C at a reducing atmosphere or in a vacuum degree of between 1*10<-4> and 1*10<1>Pa to obtain the metal-ceramic composite fibrous membrane tube. The metal-ceramic composite fibrous membrane tube solves the problem that the traditional ceramic membrane tube is difficult to assemble, cannot adapt to high temperature and harsh conditions and is difficult to form and sinter, and heat exchange performance and gas/liquid transmission rate can be improved.