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| Preparation of anode material for lithium-ion battery from waste silicon powder by ball milling |
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Received:March 22, 2021
Revised:April 06, 2021
Accepted:April 20, 2021
Published Online:June 29, 2021
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| DOI： |
| KeyWord:kerf-loss Si waste; graphite; lithium ion battery; silicon-carbon anode |
| Author | Institution |
| LU Ji-jun |
Key Laboratory of Green Process and Engineering,National Engineering Laboratory for Hydrometallurgical Cleaner Production Technology,Institute of Process Engineering,Chinese Academy of Sciences |
| LIU Jun-hao |
Key Laboratory of Green Process and Engineering,National Engineering Laboratory for Hydrometallurgical Cleaner Production Technology,Institute of Process Engineering,Chinese Academy of Sciences |
| QIAN Guo-yu |
Key Laboratory of Green Process and Engineering,National Engineering Laboratory for Hydrometallurgical Cleaner Production Technology,Institute of Process Engineering,Chinese Academy of Sciences |
| WANG Zhi |
Key Laboratory of Green Process and Engineering,National Engineering Laboratory for Hydrometallurgical Cleaner Production Technology,Institute of Process Engineering,Chinese Academy of Sciences |
| MA Jia |
Key Laboratory of Green Process and Engineering,National Engineering Laboratory for Hydrometallurgical Cleaner Production Technology,Institute of Process Engineering,Chinese Academy of Sciences |
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| Abstract: |
| Silicon-carbon (Si-C) materials are considered to be the most promising next-generation high-energy-density lithium-ion battery (LIB) anodes. However, at present, the complex preparation process of high-quality Si-C anode materials for lithium-ion battery anodes and the high cost of Si raw materials result in high prices of Si-C materials, which seriously hinder the large-scale application of Si-C materials in the field of LIBs. This paper uses low-cost cutting waste Si powder as the Si source and graphite as the carbon source, and uses a simple high-energy ball milling method to prepare waste Si powder-graphite composite material (WSi-G). The properties and characteristics of waste Si (WSi) powder, the microstructure of Si-C composites and their electrochemical properties was systematically studied. The results show that the cycle performance of micron-sized WSi is rapidly decayed when it is directly used as a LIB anode. Preparation of silicon carbon materials by ball milling exhibits excellent cycle stability when used in the anode of LIB, and the reversible specific capacity is stable above 428 mA·h/g at a current density of 0.5 A g-1 for 160 cycles. |
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