期刊
ACS APPLIED MATERIALS & INTERFACES
卷 11, 期 37, 页码 33844-33849出版社
AMER CHEMICAL SOC
DOI: 10.1021/acsami.9b09373
关键词
lithium metal battery; carbonate-based electrolyte; methyl acetate; LiF-rich SEI layer; high rate capability
资金
- Leading Human Resource Training Program of Regional Neo industry through the National Research Foundation of Korea (NRF) - Ministry of Science, ICT, and future Planning [NRF-2016H1D5A1910545]
(I)n lithium metal batteries (LMBs), electrolytes composed of salts and organic solvents play a significant role in transporting Li+ ions and creating the surface film on Li-metal anodes. Herein, the effect of methyl acetate (MA) as a co-solvent is reported, which enables the facilitated Li+ transport and formation of a robust solid electrolyte interphase (SEI) on the Li-metal anode. The symmetrical Li//Li cell tests show remarkable cycle stability of MA-based electrolytes at 3 mA/cm(2) without obvious voltage fluctuation. At 5 mA/cm(2), the Li//Li cells in MA-based electrolytes can still MA-free electrolytes. Furthermore, the LMBs consisting of the Li anode and LiNi0.8Co0.15Al0.05O2(NCA) cathode deliver the high capacity (similar to 200 mA h/ g), good cycling stability up to 300 cycles, excellent rate capability (10 C), and low self-discharging rates (8.5%) with MA-based electrolytes. Especially, the capacity of the Li//NCA cells with MA30 electrolytes at -35 degrees C is as high as 144 mA h/g, which is higher than that of the cells in MA-free electrolytes. It demonstrates that the MA is beneficial for the LMB operation at high rate and low temperature.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据