New ternary molten salt electrolyte based on alkali metal triflates

被引：11
|
作者：
Tu, Xiaohua [1 ]
Chu, Youqun [1 ]
Ma, Chunan [1 ]
机构：
[1] Zhejiang Univ Technol, State Key Lab Breeding Base Green Chem Synth Tech, Coll Chem Engn & Mat Sci, Hangzhou 310032, Zhejiang, Peoples R China
来源：
IONICS | 2010年 / 16卷 / 01期
关键词：
Molten salt; Alkali metal triflate; Thermal property; Ionic conductivity; Electrochemical window; DECOMPOSITION KINETICS; LIBR-KBR; BEHAVIOR; ION;
D O I：
10.1007/s11581-009-0390-9
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：
A novel molten salt electrolyte composed of lithium triflate (CF3SO3Li, LiTf), sodium triflate (CF3SO3Na, NaTf), and potassium triflate (CF3SO3K, KTf) has been prepared and characterized by thermogravimetry/differential thermal analysis (TG/DTA), electrochemical impedance spectroscopy (EIS), and cyclic voltammetry. TG/DTA shows that the electrolyte was thermally stable when the temperature was under 400 A degrees C. Its thermal stability gradually decreased with increase of LiTf concentration. The ionic conductivity of molten salt electrolyte has been evaluated by EIS and its value exceeds 10(-2) Scm(-1) in the temperature range from 230 to 270 A degrees C. The electrochemical window of the electrolyte at the molar ratio of 0.5/1/1 is about 4.7 V at 250 A degrees C. This electrolyte with low melting point exhibits promising characteristics for high-temperature lithium batteries.
引用
收藏
页码：81 / 84
页数：4
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