碳酸乙烯酯
电解质
塔菲尔方程
无机化学
电化学
锂(药物)
碳酸二甲酯
化学
大气温度范围
丁酸乙酯
介电谱
氢氧化锂
材料科学
离子
电极
离子交换
有机化学
物理化学
催化作用
气象学
内分泌学
物理
乙酸乙酯
医学
作者
Marshall C. Smart,Brett L. Lucht,Swapnil Dalavi,Frederick C. Krause,B. V. Ratnakumar
出处
期刊:Journal of The Electrochemical Society
[The Electrochemical Society]
日期:2012-01-01
卷期号:159 (6): A739-A751
被引量:104
摘要
The effect of additives upon the ability of meso-carbon microbead (MCMB) carbon/ LiNixCo1−xO2 lithium-ion cells containing methyl butyrate-based electrolytes to provide operation over a wide temperature range (−60 to +60°C) was investigated. A number of electrolyte additives were studied, including mono-fluoroethylene carbonate (FEC), lithium oxalate, vinylene carbonate (VC), and lithium bis(oxalato borate) (LiBOB). The intent of incorporating these additives into methyl butyrate-based electrolytes is to widen the operating temperature range of these systems, especially at warm temperatures. A number of formulations were investigated in experimental three-electrode MCMB/ LixNiyCo1−yO2 lithium-ion cells, based on an electrolyte that has previously been demonstrated to provide good low temperature performance (to −60°C), namely 1.00M LiPF6 in ethylene carbonate (EC) + ethyl methyl carbonate (EMC) + methyl butyrate (MB) (20:20:60 v/v%). In addition to studying the charge and discharge behavior of the cells, a number of electrochemical techniques were also employed, including Electrochemical Impedance Spectroscopy (EIS), Tafel polarization and linear polarization to understand the interfacial effects on the intercalation kinetics.
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