Hexafluorophosphate Intercalation into the Graphite Electrode from Mixed Cyclic Carbonates

被引：11
作者：
Wang, Boyu [1 ,2 ]
Wang, Yunju [1 ,2 ]
Huang, Yuhao [1 ,2 ]
Zhang, Lei [1 ,2 ]
Ma, Shunchao [1 ]
Wang, Hongyu [1 ,2 ]
机构：
[1] Chinese Acad Sci, Changchun Inst Appl Chem, State Key Lab Electroanalyt Chem, Changchun 130022, Peoples R China
[2] Univ Sci & Technol China, Sch Appl Chem & Engn, Hefei 230026, Peoples R China
来源：
ACS APPLIED ENERGY MATERIALS | 2021年 / 4卷 / 05期
基金：
中国国家自然科学基金;
关键词：
PF6-; anion-graphite intercalation compounds; co-solvation of anions; dual-ion battery; cyclic carbonates; in situ and ex situ XRD; in situ Raman; ANION INTERCALATION; REVERSIBLE INTERCALATION; ENERGY; MIXTURES; BEHAVIOR;
D O I：
10.1021/acsaem.1c00813
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：
The storage of anions in the graphite electrode depends upon the composition of electrolyte solutions. LiPF6 and cyclic carbonates are the most common components of nonaqueous electrolyte solutions. In this paper, we investigated the performance and solvation states of the graphite cathode in 1 M LiPF6 solutions dissolved in traditional cyclic carbonates including EC, PC, BC, and their mixtures. The storage behavior of PF6- in the graphite electrode was elucidated by several electrochemical experiments combined with ex situ and in situ XRD measurements. The intercalation of the anion co-solvated by more than two carbonates into graphite has been discovered. It was also found that the storage performance of PF6- in the graphite electrode was closely related to the composition of electrolyte solution. This study provides a simple method for tailoring the solvation states of anions within graphite electrodes.
引用
收藏
页码：5316 / 5325
页数：10
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