A novel graphite-based dual ion battery using PP14NTF2 ionic liquid for preparing graphene structure
A novel graphite-based dual ion battery using PP14NTF2 ionic liquid for preparing graphene structure
复制标题
采用PP14NTF2离子液体制备石墨烯结构的新型石墨基双离子电池
DOI：
10.1016/j.carbon.2018.06.002
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发表时间：
2018-11-01
期刊：
影响因子：
10.9
通讯作者：
Gao, Fei
中科院分区：
文献类型：
--
作者：
Li, Zhanyu;Liu, Jian;Gao, Fei
Herein, a novel graphite-graphite dual ion battery (GGDIB) based on N-butyl-N-methyl-piperidinium bis(trifluoromethyl sulfonyl)imide (PP14NTF2) ionic liquid room temperature ionic liquid electrolyte, using conductive graphite paper as cathode and anode material is developed. The working principle of the GGDIB is investigated by scanning electron microscopy (SEM) and X-ray photoelectron spectroscopy (XPS), that is, the NTF2- anions and PP14+ cations in the electrolyte are intercalated into the graphite electrode during the charging process, while the NTF2- anions and PP14+ cations are released into the electrolyte from the graphite electrode during discharging process. Interestingly, it is found through transmission electron microscopy (TEM) analysis that the graphite cathode and anode electrode materials of this GGDIB can become a few layers of graphene structure after cycling. The electrochemical performance, especially the discharge capacity, is influenced by the phenomenon of self-discharge. This GGDIB also exhibits excellent electrochemical performance, that is, the discharge capacity is 78.1 mA h g(-1) at a current density of 20 mA g(-1) over a voltage window of 0.1-5.0 V. In addition, the pseudopotential behavior in the GGDIB is also studied by cyclic voltammetry (CV). (C) 2018 Elsevier Ltd. All rights reserved.
