首页|A perspective on the key factors of safety for rechargeable magnesium batteries

A perspective on the key factors of safety for rechargeable magnesium batteries

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Rechargeable Mg batteries(RMBs)have become one of the best subsitutes for lithium-ion batteries due to the high volumetric capacity,abundant resources,and uniform plating behavior of Mg metal anode.However,the safety hazard induced by the formation of high-modulue Mg dendrites under a high current density(10 mA cm-1)was still revealed in recent years.It has forced researchers to re-examine the safety of RMBs.In this review,the intrinsic safety factors of key components in RMBs,such as uneven plating,pitting and flammability of Mg anode,heat release and crystalline water decomposition of cathode,strong corrosion,low oxidition stability and flammability of electrolytes,and so forth,are systematacially summarized.Their origins,formation mechanisms,and possible safety hazards are deeply discussed.To develop high-performance Mg anode,current strategies including designing artificial SEI,three-dimensional substrates,and Mg alloys are summarized.For practical electrolytes,the configurations of boron-centered anions and simple Mg salts and the functionalized solvent with high boiling point and low flammability are suggested to comprehensively design.In addition,the future study should more focus on the investigation on the thermal runaway and decomposition of cathode materials and separa-tors.This review aims to provide fundamental insights into the relationship between electrochemistry and safety,further promoting the sustainable development of RMBs.

Rechargeable Mg batteriesBattery safetyMg dendritesElectrolyte decompositionIntrinsic safety issues

Shuangshuang Tan、Jie Xu、Rongrui Deng、Qiannan Zhao、Chaohe Xu、Guangsheng Huang、Jingfeng Wang、Fusheng Pan

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National Engineering Research Center for Magnesium Alloys,Chongqing University,Chongqing 400044,China

National Innovation Center for Industry-Education Integration of Energy Storage Technology,College of Materials Science and Engineering,Chongqing University,Chongqing 400044,China

Chongqing Institute of New Energy Storage Materials and Equipment,Chongqing 401135,China

National Key R&D Program of ChinaNational Natural Science Foundation of ChinaNational Natural Science Foundation of ChinaNinth Young Elite Scientists Sponsorship Program by CASTChongqing Technology Innovation and Application Development Project

2023YFB3809500U23A20555522022112023QNRC001CSTB2022TIAD-KPX0028

2024

10.1016/j.jechem.2024.03.015

能源化学
中国科学院大连化学物理研究所 中国科学院成都有机化学研究所

能源化学

CSTPCDEI
影响因子：0.654
ISSN：2095-4956
年,卷(期)：2024.94(7)