Hexafluorophosphate anion intercalation into graphite electrode from sulfolane/ethylmethyl carbonate solutions

被引：81
作者：
Fan, Hui [1 ,2 ]
Gao, Jichao [1 ,2 ]
Qi, Li [1 ]
Wang, Hongyu [1 ]
机构：
[1] Chinese Acad Sci, Changchun Inst Appl Chem, State Key Lab Electroanalyt Chem, 5625 Renmin St, Changchun 130022, Peoples R China
[2] Univ Chinese Acad Sci, Beijing 100049, Peoples R China
来源：
ELECTROCHIMICA ACTA | 2016年 / 189卷
基金：
中国国家自然科学基金;
关键词：
Hexafluorophosphate; Sulfolane; Ethylmethyl carbonate; Graphite intercalation compounds; Solvation effect; ELECTROCHEMICAL INTERCALATION; PF6; BEHAVIOR; VOLTAGE;
D O I：
10.1016/j.electacta.2015.12.078
中图分类号：
O646 [电化学、电解、磁化学];
学科分类号：
081704 ;
摘要：
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.
引用
收藏
页码：9 / 15
页数：7
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