Abnormal Inverse Current during Anion Deintercalation from Graphite Electrode

被引：16
作者：
Huang, Yuhao [1 ,2 ]
Li, Jiayu [1 ,2 ]
Wang, Hongyu [1 ,2 ,3 ]
机构：
[1] Chinese Acad Sci, Changchun Inst Appl Chem, 96 Jinzhai Rd, Hefei 230026, Anhui, Peoples R China
[2] Univ Sci & Technol China, Sch Appl Chem & Engn, 96 Jinzhai Rd, Hefei 230026, Anhui, Peoples R China
[3] Chinese Acad Sci, Changchun Inst Appl Chem, State Key Lab Electroanalyt Chem, 5625 Renmin St, Changchun 130022, Jilin, Peoples R China
来源：
ACS APPLIED ENERGY MATERIALS | 2019年 / 2卷 / 06期
基金：
中国国家自然科学基金;
关键词：
countercurrent; backflow; resolvation; anion intercalation; dual-ion battery; tetrafluoroborate; ethylene carbonate; graphite; X-RAY-DIFFRACTION; ELECTROCHEMICAL INTERCALATION; BIS(TRIFLUOROMETHANESULFONYL)IMIDE ANIONS; POSITIVE ELECTRODE; IMIDE ANIONS; PERFORMANCE; INSIGHTS; BEHAVIOR; VOLTAGE; CARBONS;
D O I：
10.1021/acsaem.9b00792
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
It was taken for granted that the charge and discharge processes correspond with distinctly opposite directions of ionic flow when the energy storage mechanism of dual ion battery was concerned. This common sense is challenged as we find a remarkable countercurrent in the cyclic voltammetric curve during the deintercalation of tetrafluoroborate anions from graphite electrode using ethylene carbonate solution. By electrochemical analysis, there is believed to be backflow of anions during the deintercalation process. The cause of this abnormal ionic flow relates to both the desolvation and resolvation of the intercalated anions inside the graphite electrode. Supportive evidence is provided.
引用
收藏
页码：4544 / 4550
页数：13
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