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首页> 外文期刊>Journal of power sources >Charge-discharge and high temperature reaction of LiCoO_2 in ionic liquid electrolytes based on cyano-substituted quaternary ammonium cation
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Charge-discharge and high temperature reaction of LiCoO_2 in ionic liquid electrolytes based on cyano-substituted quaternary ammonium cation

机译:基于氰基取代的季铵阳离子的离子液体电解质中LiCoO_2的充放电和高温反应

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摘要

The charge-discharge performance of LiCoO_2 positive electrode was observed in a mixed electrolyte system consisting of two ionic liquids: cyano-substituted quaternary ammonium bis(trifluoromethane)sulfoneimide (TFSI) and a same-anion salt of l-ethyl-3-methyl imidazolium (EMI). The positive electrode exhibited a discharge capacity rather close to the theoretical one when N,N,N,N,-cyanoethyl trimethyl ammonium salt was applied. Differential scanning calorimetry (DSC) studies revealed that these electrolytes exhibited exotherm only around 260 deg C, 50 deg C higher than conventional carbonate-based electrolytes. This is the first attempt to reveal the thermal stability of ionic liquid electrolyte under a practical situation.
机译:在由两种离子液体组成的混合电解质体系中观察到LiCoO_2正极的充放电性能:氰基取代的季铵盐双(三氟甲烷)磺酰亚胺(TFSI)和1-乙基-3-甲基咪唑鎓的同阴离子盐(EMI)。当施加N,N,N,N,-氰乙基三甲基铵盐时,正极表现出相当接近理论上的放电容量。差示扫描量热法(DSC)研究表明,这些电解质仅在260摄氏度左右才出现放热,比常规的基于碳酸盐的电解质高50摄氏度。这是揭示离子液体电解质在实际情况下的热稳定性的首次尝试。

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