A Novel Molybdotungstosilicate Gel Electrolyte with Wide Electrochemical Stability Window

被引：5
|
作者：
Xie, Zhirong [1 ]
Wu, Qingyin [1 ]
Dai, Wenshuang [2 ]
He, Fengwei [2 ]
机构：
[1] Zhejiang Univ, Dept Chem, Hangzhou 310027, Zhejiang, Peoples R China
[2] Liaoning Inst Sci & Technol, Sch Biomed & Chem Engn, Benxi 117004, Liaoning, Peoples R China
来源：
INTERNATIONAL JOURNAL OF ELECTROCHEMICAL SCIENCE | 2018年 / 13卷 / 12期
关键词：
polyoxometalates; structural; ionic conductivity; amorphous materials; electrochemical stability potential window; IONIC LIQUIDS; POLYOXOMETALATE CLUSTER; POLYMER ELECTROLYTE; ACID;
D O I：
10.20964/2018.12.33
中图分类号：
O646 [电化学、电解、磁化学];
学科分类号：
081704 ;
摘要：
New hybrid gel electrolyte [MIMPS](4)SiW11MoO40 (IL-SiW11Mo) has been synthesized from the heteropoly acid H4SiW11MoO40 and 1-(3-sulfonic group) propyl-3-methyl imidazolium (abbreviated as MIMPS). The results of FTIR and XRD reveal that the synthesized polyoxometalate-based gel electrolyte possesses lamellar structure and exhibits the characteristic thermo-tropic liquid-crystalline behavior, which can undergo a phase transformation from a viscous gel state to liquid state below 100 degrees C. Its ionic conductivity of up to similar to 10(-3) S cm(-1) was observed above the phase transformation temperature. The electrochemical stability potential window (ESW) of IL-SiW11Mo was found to be about 4V at room temperature. The electrochemical impedance spectroscopy (EIS) was carried out to study the capacitance and ion mobility of IL-POM used as electrolyte. The results show that IL-SiW11Mo has high capacitance and fast ion mobility.
引用
收藏
页码：11684 / 11690
页数：7
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