锂(药物)
碳酸丙烯酯
碳酸乙烯酯
无机化学
化学
碳酸盐
电极
碳酸二甲酯
金属
作者
Zhipeng Jiang,Ziqi Zeng,Baoyu Zhai,Xing Li,Wei Hu,Han Zhang,Shijie Cheng,Jia Xie
标识
DOI:10.1016/j.jpowsour.2021.230086
摘要
Abstract Lithium metal battery (LMB) is regarded as a rising star for next generation high energy density batteries. However, there is still a great challenge to achieve stable cycling of high-voltage LMBs, especially under practical conditions. Herein, we report a fluorobenzene-based (FB-based) diluted highly concentrated carbonate electrolyte with significantly improved physical and electrochemical properties. Employing FB as the diluent not only reduces the viscosity, density and cost of highly concentrated electrolyte, but also contributes to the formation of layer-like solid electrolyte interphase with enriched LiF. The collective superiority enables outstanding cycling stability of lithium metal anode. Consequently, Li||LiNi0·6Co0·2Mn0·2O2 batteries with high areal capacity (3.6 mAh cm−2) based on such electrolyte show excellent cycling performance under a range of realistic conditions, including lean electrolyte (3 g Ah−1), low-temperature (−20 °C), and limited Li source (50 μm). This work provides a facile but effective method to achieve a stable high-voltage LMBs and demonstrates its potential in practical application.
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