期刊
ELECTROCHIMICA ACTA
卷 196, 期 -, 页码 197-205出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.electacta.2016.02.101
关键词
anode; porous composite; Si-C composite; alkaline etching; lithium-ion battery
资金
- Korea Evaluation Institute of Industrial Technology (KEIT)
- Ministry of Trade, Industry & Energy, Republic of Korea [10046341]
- Hanyang University [HY-2012-T]
- Korea Evaluation Institute of Industrial Technology (KEIT) [10046341] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
Porous silicon-carbon (Si-C) composite materials have attracted a great deal of attention as high-performance anode materials for Li-ion batteries (LIBs), but their use suffers from the complex and limited synthetic routes for their preparation. Herein we demonstrate a scalable and nontoxic method to synthesize porous Si-C composite materials by means of simultaneous chemical etching of Si and carbon phases using alkaline solution. The resulting porous Si-C composite material showed greatly improved cycle performance, good rate capability, and high dimensional stability during cycling. Porous Si-C electrode showed an expansion of the height by about 22% after the first lithiation and only 16% after the first cycle. The material synthesis concept and scalable simultaneous etching approach presented here represent a means of improving the electrochemical properties of Si-based porous anode materials for use in commercial LIBs. (C) 2016 Elsevier Ltd. All rights reserved.
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