阳极
法拉第效率
阴极
电镀(地质)
电解质
水溶液
剥离(纤维)
材料科学
锌
化学工程
合金
电化学
电极
无机化学
金属
化学
冶金
复合材料
有机化学
物理化学
工程类
地质学
地球物理学
作者
Fei Wang,Oleg Borodin,Tao Gao,Xiulin Fan,Wei Sun,Fudong Han,Antonio Faraone,Joseph A. Dura,Kang Xu,Chunsheng Wang
出处
期刊:Nature Materials
[Springer Nature]
日期:2018-04-16
卷期号:17 (6): 543-549
被引量:2021
标识
DOI:10.1038/s41563-018-0063-z
摘要
Metallic zinc (Zn) has been regarded as an ideal anode material for aqueous batteries because of its high theoretical capacity (820 mA h g-1), low potential (-0.762 V versus the standard hydrogen electrode), high abundance, low toxicity and intrinsic safety. However, aqueous Zn chemistry persistently suffers from irreversibility issues, as exemplified by its low coulombic efficiency (CE) and dendrite growth during plating/ stripping, and sustained water consumption. In this work, we demonstrate that an aqueous electrolyte based on Zn and lithium salts at high concentrations is a very effective way to address these issues. This unique electrolyte not only enables dendrite-free Zn plating/stripping at nearly 100% CE, but also retains water in the open atmosphere, which makes hermetic cell configurations optional. These merits bring unprecedented flexibility and reversibility to Zn batteries using either LiMn2O4 or O2 cathodes-the former deliver 180 W h kg-1 while retaining 80% capacity for >4,000 cycles, and the latter deliver 300 W h kg-1 (1,000 W h kg-1 based on the cathode) for >200 cycles.
科研通智能强力驱动
Strongly Powered by AbleSci AI