Cycling Performances of Lithium-Air Cells Assembled with Mixed Electrolytes of Ionic Liquid and Diethylene Glycol Diethyl Ether
Cycling Performances of Lithium-Air Cells Assembled with Mixed Electrolytes of Ionic Liquid and Diethylene Glycol Diethyl Ether
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离子液体与二甘醇二乙醚混合电解质组装锂空气电池的循环性能
DOI：
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发表时间：
2015
期刊：
影响因子：
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通讯作者：
Dong‐Won Kim
中科院分区：
文献类型：
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作者：
Sangmin Han;Jae;Dong‐Won Kim
制备了由二甘醇二乙醚和1-丁基-1-甲基吡咯烷双(三fl)磺酰亚胺组成的离子液体电解质，并评价了其在非水锂空气电池中的应用。在电解液中加入适量的BMP-TFSI，提高了离子电导率、氧化稳定性和界面稳定性，降低了fl的流动性和挥发度。当BMP-TFSI与DEGDEE在最佳条件下混合时，与单独使用有机电解液或离子液体电解液相比，循环性能显著提高。由优化的离子液体基混合电解液组装的锂空气电池首次放电容量高达10,620mAhg−1，在0.1 mA cm−2的电流密度下循环稳定性超过150次，放电深度限制在500mAhg−1。不是
Ionic liquid-based electrolytes composed of diethylene glycol diethyl ether (DEGDEE) and 1-butyl-1-methyl pyrrolidinium bis(trifluoromethane) sulfonyl imide (BMP-TFSI) were prepared and evaluated for non-aqueous lithium-air cell applications. Adding an appropriate amount of BMP-TFSI to the electrolyte solution improved ionic conductivity, oxidative stability and interfacial sta- bility, and reduced flammability and volatility. When BMP-TFSI was mixed with DEGDEE under optimal condition, the cycle performance was remarkably improved as compared with either the organic electrolyte or ionic liquid electrolyte alone. The Li-air cell assembled with an optimized ionic liquid-based mixed electrolyte initially delivered a high discharge capacity of 10,620 mAh g − 1 and exhibited good cycling stability exceeding 150 cycles at a current density of 0.1 mA cm − 2 by limiting depth of discharge to 500 mAh g − 1 . No