期刊
ENERGY TECHNOLOGY
卷 9, 期 9, 页码 -出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/ente.202100330
关键词
cathode materials; electrochemical performances; gallium-tin alloys; grid energy storages; liquid metal batteries
资金
- Analysis and Test fund of Kunming University of Science and Technology [2020P20191130012]
The room-temperature liquid metal battery with solid lithium anode and gallium-tin alloy cathode shows good cyclic reversibility, high energy efficiency, high discharge voltage, and smaller polarization voltage, ensuring high Coulomb efficiency and good rate performance.
Herein, a room-temperature liquid metal battery (LMB) with a solid lithium anode electrode and gallium-tin (Ga-Sn) alloy cathode electrode is reported. With the improved wettability of the electric collector and grain-refined liquid metal droplets cathode, the aforementioned LMB exhibits good cyclic reversibility and negligible self-discharge. The result shows that the assembled Li||Ga-Sn battery has a satisfactory specific capacity (409 mAh g(-1)) and high energy efficiency (up to 92%). The low melting point Ga-Sn alloy can construct fast kinetics for the redox reaction and improve the electrode reaction kinetics, imparting the Li||Ga-Sn system with high discharge voltage (0.77 V at 1C) and smaller polarization voltage at different current densities, which ensure the high Coulomb efficiency and good rate performance of the battery. Moreover, the battery stably cycles at 35 degrees C for 60 cycles at the 1C rate, with no significant capacity degradation. With good electrochemical performance, simple structure, easy maintenance, and high safety, this room-temperature Li||Ga-Sn battery may be a promising choice for power grid energy storage applications.
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