Effects of Li2CO3 Additive on the Performance of Graphite Electrode

Chem. J. Chinese Universities ›› 2010, Vol. 31 ›› Issue (12): 2468.

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Effects of Li₂CO₃ Additive on the Performance of Graphite Electrode

TIAN Lei-Lei, ZHUANG Quan-Chao*, WANG Rong, CUI Yong-Li, FANG Liang, QIANG Ying-Huai

Lithium-ion Batteries Laboratory, School of Materials Science and Engineering, China University of Mining and Technology, Xuzhou 221116, China

Received:2010-01-21 Revised:2010-08-25 Online:2010-12-10 Published:2010-12-06
Contact: ZHUANG Quan-Chao E-mail:zhuangquanchao@126.com
About author:庄全超, 男, 博士, 副教授, 主要从事新能源材料的研究.
Supported by:
中国矿业大学科技攀登计划(批准号: ON090237)、中国矿业大学青年科技基金(批准号: ON080282)、中国矿业大学人才引进经费(批准号: ZX280)和国家与江苏省大学生实践创新训练计划资助.

Abstract

Abstract: Effects of Li2CO3 additive on the electrochemical performance of graphite electrode was investigated by EIS and CV. The CV results showed that electrochemical performance of the graphite electrode was improved due to that the single electron reduction of EC during the first lithiation was largely suppressed in the electrolyte with Li2CO3. EIS results displayed that the SEI film showed better viscoelasticity in the electrolyte with Li2CO3, thus it can well accommdate the tiny volume change resulted from the process of Li-ion intercalation, which made Li-ion intercalation much easier.

Key words: lithium ion batteries, SEI film, Li2CO3, electrochemical impedance spectroscopy

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TIAN Lei-Lei, ZHUANG Quan-Chao, WANG Rong, CUI Yong-Li, FANG Liang, QIANG Ying-Huai. Effects of Li₂CO₃ Additive on the Performance of Graphite Electrode[J]. Chem. J. Chinese Universities, 2010, 31(12): 2468.

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Effects of Li₂CO₃ Additive on the Performance of Graphite Electrode

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