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High performance Si/C@CNF composite anode for solid-polymer lithium-ion batteries
- Source :
-
Journal of Power Sources . Aug2011, Vol. 196 Issue 16, p6982-6986. 5p. - Publication Year :
- 2011
-
Abstract
- Abstract: The electrochemical performance of a composite of nano-Si powder and a pyrolytic carbon of polyvinyl chloride (PVC) with carbon nanofiber (CNF) was examined as an anode for solid-polymer lithium-ion batteries. Nano-Si powder was firstly coated with carbon by pyrolysis of PVC and then mixed with CNF (referred to as Si/C@CNF) using a rotation mixer. The composite exhibited good cycling performance, but suffered from a large irreversible capacity loss of which the retention was less than 60%. In order to reduce the loss, a thin lithium sheet was attached to the Si/C@CNF electrode surface as a reducing agent. The irreversible capacity of the first cycle was lowered to as much as 0mAhg−1 and after the third cycle, the lithium insertion and extraction efficiency was almost 100%. A reversible capacity of more than 1000mAhg−1 was still maintained after 40 cycles. [Copyright &y& Elsevier]
Details
- Language :
- English
- ISSN :
- 03787753
- Volume :
- 196
- Issue :
- 16
- Database :
- Academic Search Index
- Journal :
- Journal of Power Sources
- Publication Type :
- Academic Journal
- Accession number :
- 61174981
- Full Text :
- https://doi.org/10.1016/j.jpowsour.2010.10.091