Silicon anodes for lithium-ion batteries produced from recovered kerf powders
Journal article, Peer reviewed
Accepted version
![Thumbnail](/ntnu-xmlui/bitstream/handle/11250/2616603/Wagner%2betal%2b-%2bmanuscript%2baccepted%2bversion%2b-%2bSilicon%2banodes%2bfor%2blithium-ion%2bbatteries%2bproduced%2bfrom%2brecovered%2bkerf%2bpowders.pdf.jpg?sequence=6&isAllowed=y)
View/ Open
Date
2019Metadata
Show full item recordCollections
- Institutt for materialteknologi [2544]
- Publikasjoner fra CRIStin - NTNU [38045]
Abstract
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.