SILICON-CARBON-BASED NEGATIVE ELECTRODE MATERIAL AND PREPARATION METHOD THEREOF

WIPO Patent Application WO/2022/126882

A1

The present invention relates to the technical field of electrode materials, in particular to a silicon-carbon-based negative electrode material and a preparation method therefor. The silicon-carbon-based negative electrode material comprises a silicon material and a carbonaceous layer coating the surface of the silicon material, and the mass content of the silicon material is 30% to 50%. The silicon material is prepared by pickling a mixture of silicon oxide, a silicon-nickel alloy and a silicon-aluminum alloy, the silicon material has a porous structure, and the silicon-carbon-based negative electrode material has a porous structure. The silicon-carbon-based negative electrode material has a porous structure, which can alleviate the volume effect occurring during the process of charge and discharge, and reduce the pulverization and shedding of electroactive substances, thus improving the cycle stability of the lithium ion battery, and prolonging the service life and increasing the specific capacity of silicon-carbon-based negative electrode material. Coating the surface of a silicon material with a carbonaceous layer can effectively alleviate the problem of volume expansion of silicon materials. The silicon-carbon-based negative electrode material has a good cycle stability, a good conductivity and a high specific capacity, and also has good application prospects.

GE CHUANCHANG (CN)
YANG YONGJUN (CN)

PCT/CN2021/081202

June 23, 2022

March 17, 2021

Click for automatic bibliography generation  

GUANGDONG KAIJIN NEW ENERGY TECH CO LTD (CN)

H01M4/62; H01M4/36

CN105655555A	2016-06-08
CN107507972A	2017-12-22
CN109755483A	2019-05-14
CN110844910A	2020-02-28
CN108682817A	2018-10-19

DONGGUAN HENGCHENG IP AGENCY CO., LTD (CN)

View/Download PDF      PDF Help

Previous Patent: SHOWER KIT AND TAP THEREOF, AND WATER DIVERTER VALVE CORE

Next Patent: BATTERY AND APPARATUS