Journal
CARBON
Volume 82, Issue -, Pages 161-167Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.carbon.2014.10.046
Keywords
-
Funding
- MOST [2012CB933401, 2014CB643502]
- NSFC [51273093, 21374050, 51373078]
- PCSIRT [IRT1257]
- Tianjin city [13RCGFGX01121]
Ask authors/readers for more resources
Silicon is one of the most attractive anode materials for next-generation lithium-ion batteries, but generally it has poor cycle performance because of its severe volume change during lithiation/delithiation and its low intrinsic electrical conductivity. We fabricated a ternary Si-based composite Si@C/GF in which Si nanoparticles were coated on a thin carbon layer by pyrolysis of phenolic resin and encapsulated in a graphene framework (GF). The GF provides an elastic and robust three-dimensional structure to buffer the large volume change of Si, while the PR-pyrolytic carbon not only limits the huge volume change of Si, but also retains good contact with both the GF and Si to maintain electrode integrity. As a result, the double-protected Si nanoparticles have a much improved cycle stability (85% capacity retention, ca. 650 mAh/g after 200 cycles at 1 A/g) as well as high specific capacity and good rate performance. (C) 2014 Elsevier Ltd. All rights reserved.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available