Bifunctional non-nucleophilic electrolyte enables long-life magnesium batteries via elimination of passive film on Mg anode

被引:9
|
作者
Li, Ruinan [1 ]
Zhang, Rupeng [1 ]
Liu, Qingsong [1 ]
An, Jiale [1 ]
Song, Yajie [1 ]
Deng, Biao [2 ]
Ma, Yulin [1 ]
Huo, Hua [1 ]
Gao, Yunzhi [1 ]
Wang, Jiajun [1 ]
Zuo, Pengjian [1 ]
Yin, Geping [1 ]
机构
[1] Harbin Inst Technol, Sch Chem & Chem Engn, MIIT Key Lab Crit Mat Technol New Energy Convers &, Harbin 150001, Heilongjiang, Peoples R China
[2] Chinese Acad Sci, Shanghai Inst Appl Phys, 239 Zhangheng Rd, Shanghai 201204, Peoples R China
基金
中国国家自然科学基金;
关键词
Magnesium battery; Non-nucleophilic electrolyte; Passive film; Magnesium-sulfur battery; ELECTRODEPOSITION; DEPOSITION; SPECIATION; STABILITY; AL;
D O I
10.1016/j.cej.2023.141998
中图分类号
X [环境科学、安全科学];
学科分类号
08 ; 0830 ;
摘要
Magnesium batteries are one of the ideal candidates for next-generation battery systems with high energy density and safety. However, the development of compatible non-nucleophilic electrolytes and the passivation of the Mg anode are the primary obstacles that impede their development. Here, a non-nucleophilic electrolyte is proposed through in-situ reactions between AlCl3 + InCl3/TEG (AI-E) electrolyte and Mg anode, which kills two birds with one stone that magnesium salts with the structures of [MgCl center dot TEG](+) and [MgCl center dot 2TEG](+) are generated and the passive film on Mg anode is converted into solid electrolyte interphase (SEI). Compared with the Mg(TFSI)(2) electrolyte, the polarization of the Mg anode in the AI-E electrolyte decreases from 2.0 V to 0.08 V for 400 cycles, and the Mg/S battery with the AI-E electrolyte reaches an improved discharge voltage plateau of 1.12 V for 50 cycles. This work expects to provide a one-step method for magnesium salt synthesis and Mg anode passivation.
引用
收藏
页数:9
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