阳极
电解质
铋
镁
材料科学
电镀(地质)
电化学
金属
图层(电子)
无机化学
剥离(纤维)
化学工程
电偶阳极
腐蚀
冶金
电极
化学
阴极保护
纳米技术
复合材料
地球物理学
物理化学
工程类
地质学
作者
Yimin Zhao,Aobing Du,Shanmu Dong,Feng Jiang,Ziyang Guo,Xuesong Ge,Xuelian Qu,Xinhong Zhou,Guanglei Cui
出处
期刊:ACS energy letters
[American Chemical Society]
日期:2021-06-28
卷期号:6 (7): 2594-2601
被引量:85
标识
DOI:10.1021/acsenergylett.1c01243
摘要
Rechargeable magnesium (Mg) metal batteries are provided with potential advantages over lithium counterparts with respect to volumetric capacity and natural abundance (equivalent to low cost and sustainability). However, Mg metal anodes suffer from surface passivating behavior among numerous conventional Mg electrolytes, leading to irreversible Mg plating/stripping behavior. Herein, a modified Mg metal anode with a bismuth (Bi)-based artificial protective layer has been obtained via a facile solution process (soaking briefly in bismuth trichloride solution). This Bi-based protective layer is mainly composed of ion-conducting Bi metal and corresponding alloy and electronically insulating magnesium chloride. Various electrochemical tests and interface characterizations have proved that the protected Mg electrodes effectively inhibit the harmful parasitic reaction between Mg metal and noncorrosive Mg electrolyte, which further enables suppression of uneven growth during repeated Mg stripping/plating. More importantly, the assembled Mg–Cu2–xS and Mg–O2 full batteries utilizing the as-modified Mg anodes all deliver remarkably improved performance owing to the superior protection properties of a Bi-based artificial layer. These novel findings will inspire lot of efforts to modify the Mg metal anode with targeted surface coatings for high-performance rechargeable Mg batteries.
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