Insights into Hyper-Efficient Construction of Compact Artificial SEI for Highly Reversible Mg Metal Anode

IF 19.3 1区材料科学 Q1 CHEMISTRY, PHYSICAL

ACS Energy Letters Pub Date : 2024-10-29 DOI:10.1021/acsenergylett.4c0212310.1021/acsenergylett.4c02123

Yuhang Chen, Xing Shen, Jingfeng Wang*, Yiming Zhang, Yue Hao, Le Tong, Guangsheng Huang, Qian Li, Xiaoyuan Zhou, Baihua Qu* and Fusheng Pan,

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Abstract

The practical applications of Mg metal anodes in rechargeable magnesium batteries (RMBs) have been seriously hindered due to the unstable anode interface. Herein, a simple and hyper-efficient hydrolysis of metal chloride strategy is proposed to obtain a dense layer of artificial SEI on the surface of the Mg anode. Based on the variations of relative compactness density (rρ_c), the morphology and electrochemical properties of the artificial SEI layer can be precisely regulated. Moreover, the surface-reconstructed In/MgCl₂@Mg electrode can achieve an ultralong cycle life of 1500 cycles at a current density of 3 mA cm^–2 and 1 mA h cm^–2 as well as a low overpotential (0.25 V). Consequently, a stable cycle capacity can also be maintained at 1C after 1000 cycles in full cell configurations, matching with the Mo₆S₈ cathode. This study provides a novel design concept and quantitative criteria for the specific preparation of efficient Mg anodes.

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为高可逆镁金属阳极构建超高效紧凑型人工 SEI 的启示

由于阳极界面不稳定，镁金属阳极在可充电镁电池（RMB）中的实际应用受到严重阻碍。本文提出了一种简单而高效的金属氯化物水解策略，以在镁阳极表面获得一层致密的人工 SEI。根据相对致密性密度（rρc）的变化，可以精确调节人工 SEI 层的形态和电化学特性。此外，在电流密度为 3 mA cm-2 和 1 mA h cm-2 以及过电位较低（0.25 V）的条件下，表面重构的 In/MgCl2@Mg 电极可实现 1500 次的超长循环寿命。因此，与 Mo6S8 阴极相匹配，在全电池配置中，1000 次循环后还能保持 1C 的稳定循环容量。这项研究为具体制备高效镁阳极提供了新颖的设计理念和量化标准。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

ACS Energy Letters Energy-Renewable Energy, Sustainability and the Environment

CiteScore

31.20

自引率

5.00%

发文量

469

审稿时长

1 months

期刊介绍： ACS Energy Letters is a monthly journal that publishes papers reporting new scientific advances in energy research. The journal focuses on topics that are of interest to scientists working in the fundamental and applied sciences. Rapid publication is a central criterion for acceptance, and the journal is known for its quick publication times, with an average of 4-6 weeks from submission to web publication in As Soon As Publishable format. ACS Energy Letters is ranked as the number one journal in the Web of Science Electrochemistry category. It also ranks within the top 10 journals for Physical Chemistry, Energy & Fuels, and Nanoscience & Nanotechnology. The journal offers several types of articles, including Letters, Energy Express, Perspectives, Reviews, Editorials, Viewpoints and Energy Focus. Additionally, authors have the option to submit videos that summarize or support the information presented in a Perspective or Review article, which can be highlighted on the journal's website. ACS Energy Letters is abstracted and indexed in Chemical Abstracts Service/SciFinder, EBSCO-summon, PubMed, Web of Science, Scopus and Portico.