期刊
ELECTROCHIMICA ACTA
卷 189, 期 -, 页码 9-15出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.electacta.2015.12.078
关键词
Hexafluorophosphate; Sulfolane; Ethylmethyl carbonate; Graphite intercalation compounds; Solvation effect
资金
- National Natural Science Foundation of China [21571173]
The electrochemical behaviour of graphite positive electrode has been tested in the electrolyte solutions of 1 mol dm(-3) LiPF6 dissolved in mixed solvents of sulfolane (SL) and ethylmethyl carbonate (EMC). The suppression of PF6- anion intercalation into graphite by SL has been demonstrated. Moreover, the favourable effect of EMC on PF6- insertion into graphite in SL-based solutions has been verified by ex situ XRD, ex situ Raman, and electrochemical tests. Furthermore, improved long-term cycling performance of graphite positive electrode has been obtained in solutions with suitable ratios of SL and EMC. (C) 2015 Elsevier Ltd. All rights reserved.
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