电解质
过电位
法拉第效率
钝化
阳极
镁
材料科学
无机化学
化学工程
金属
盐(化学)
卤化物
化学
电化学
电极
纳米技术
冶金
有机化学
物理化学
工程类
图层(电子)
作者
A‐Re Jeon,Seong Ho Jeon,Gukhyun Lim,Juyoung Jang,Woo Joo No,Si Hyoung Oh,Jihyun Hong,Seung‐Ho Yu,Min Ah Lee
出处
期刊:ACS Nano
[American Chemical Society]
日期:2023-05-08
卷期号:17 (10): 8980-8991
被引量:7
标识
DOI:10.1021/acsnano.2c08672
摘要
Rechargeable magnesium (Mg) batteries can offer higher volumetric energy densities and be safer than their conventional counterparts, lithium-ion batteries. However, their practical implementation is impeded due to the passivation of the Mg metal anode or the severe corrosion of the cell parts in conventional electrolyte systems. Here, we present a chemical activation strategy to facilitate the Mg deposition/stripping process in additive-free simple salt electrolytes. By exploiting the simple immersion-triggered spontaneous chemical reaction between reactive organic halides and Mg metal, the activated Mg anode exhibited an overpotential below 0.2 V and a Coulombic efficiency as high as 99.5% in a Mg(TFSI)2 electrolyte. Comprehensive analyses reveal simultaneous evolution of morphology and interphasial chemistry during the activation process, through which stable Mg cycling over 990 cycles was attained. Our activation strategy enabled the efficient cycling of Mg full-cell candidates using commercially available electrolytes, thereby offering possibilities of building practical Mg batteries.
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