Silicon anodes for lithium-ion batteries produced from recovered kerf powders

JOURNAL OF POWER SOURCES

卷:414

Article

Wagner, Nils Peter^1,2  Tron, Artur¹  Tolchard, Julian Richard¹  Noia, Gianluigi³  Bellmann, Martin Pawel¹ 

[1] SINTEF Ind, Dept Sustainable Energy Technol, N-7491 Trondheim, Norway

[2] Norwegian Univ Sci & Technol, Dept Mat Sci & Engn, N-7491 Trondheim, Norway

[3] Garbo Srl, I-28065 Cerano, Italy

关键词: Silicon anode;    Kerf powder;    Lithium ion battery;    NMC Si full-cell;    Waste recycling;    High capacity;   

DOI  :  10.1016/j.jpowsour.2019.01.035

来源: Elsevier

【 摘 要 】

Silicon kerf waste from a photovoltaic silicon production process is assessed as an anode material for application as a lithium ion battery anode. In contrast to previous studies, the Si-kerf is used as-produced, with no chemical treatment or physical processing beyond solvent PEG removal. The as-produced Si-kerf performed as well as, or better than, previously reported Si-kerf anodes and is found to outperform a cleaned Si-kerf sample from blade sawing with a larger particle size. This highlights the advantage of the diamond wire cutting process, which yields relatively small particles. In half-cell testing, a cycle life > 300 cycles at a capacity of 1000 mAh g(-1) is achieved with high levels of FEC addition. Full-cell testing against an NMC 442 cathode resulted in specific capacities up to 150 mAh g(-1) (NMC). A relatively high degree of lithium consumption arising from repeated SEI formation is present. It is concluded that pure Si-kerf is unsuitable for commercial application in Li-ion cells.

【 授权许可】

Free