期刊
MATERIALS LETTERS
卷 136, 期 -, 页码 254-257出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.matlet.2014.08.059
关键词
Si-Gr composite; Anode; Li-ion batteries; Electrochemistry; Binders; Energy Storage
资金
- KERI Primary research program of MSIP/ISTK [14-12-N0101-13, 14-12-N0101-69]
- National Research Foundation of Korea - Korean Government (MEST) [NRF-2013-C1AAA001-0030538]
A comparative study was conducted to examine the effect of two different polymer binders and composition ratio of active material on electrochemical performance of silicon-graphite (Si-Gr) composite electrode in rechargeable lithium-ion batteries (LIBs). Polyacrylic acid (PAA) and polyvinylidene fluoride (PVDF) were utilized as binders for composite electrode that was fabricated using Si powder, graphite and super P black (SPB) by varying composition ratios of active material. The electrochemical performance was investigated by galvanostatic charge/discharge tests at room temperature. The results revealed that composite electrode fabricated with PAA binder using maximum contents of Si powder (20 wt%) showed high specific capacity around 1000 mAh g(-1) with excellent capacity retention. The enhanced electrochemical performance can be attributed to high mechanical strength and adhesive capability provided by PAA binder to composite electrode. (C) 2014 Elsevier B.V. All rights reserved.
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