在二甲醚中用于实现高倍率可充电镁电池的混合氯化镁/氯化铝/双（三氟甲磺酰）亚胺镁电解质
Hybrid MgCl/AlCl/Mg(TFSI) Electrolytes in DME Enabling High-Rate Rechargeable Mg Batteries.
作者信息
Yang Lanlan, Yang Chaoran, Chen Yawei, Pu Zhichen, Zhang Zhenzhen, Jie Yulin, Zheng Xiang, Xiao Yunlong, Jiao Shuhong, Li Qi, Xu Dongsheng
机构信息
Beijing National Laboratory for Molecular Sciences, State Key Laboratory for Structural Chemistry of Unstable and Stable Species, Institute of Physical Chemistry, College of Chemistry and Molecular Engineering, Peking University, Beijing 100871, P. R. China.
Hefei National Laboratory for Physical Science at the Microscale, CAS Key Laboratory of Materials for Energy Conversion, Department of Materials Science and Engineering, University of Science and Technology of China, Hefei 230026, P. R. China.
出版信息
ACS Appl Mater Interfaces. 2021 Jul 7;13(26):30712-30721. doi: 10.1021/acsami.1c07567. Epub 2021 Jun 22.
Rechargeable magnesium batteries (RMBs) are considered as one of the most promising next-generation secondary batteries due to their low cost, safety, dendrite-free nature, as well as high volumetric energy density. However, the lack of suitable cathode material and electrolyte is the greatest challenge facing practical RMBs. Herein, a hybrid electrolyte MgCl/AlCl/Mg(TFSI) (MACT) in dimethyl ether (DME) is developed and exhibits excellent electrochemical performance. The high ionic conductivity (6.82 mS cm) and unique solvation structure of [Mg(μ-Cl)(DME)] promote the fast Mg kinetics and favorable thermodynamics in hybrid Mg salts and DME electrolyte, accelerating mass transport and the charge transfer process. Therefore, the great rate capability can be realized both in symmetric Mg/Mg cell and in CuS/Mg full cell.
可充电镁电池（RMBs）因其低成本、安全性、无枝晶特性以及高体积能量密度，被认为是最有前景的下一代二次电池之一。然而，缺乏合适的阴极材料和电解质是实用可充电镁电池面临的最大挑战。在此，一种在二甲醚（DME）中的混合电解质MgCl/AlCl/Mg（TFSI）（MACT）被开发出来，并展现出优异的电化学性能。[Mg（μ-Cl）（DME）]的高离子电导率（6.82 mS cm）和独特溶剂化结构促进了混合镁盐和DME电解质中快速的镁动力学和有利的热力学，加速了质量传输和电荷转移过程。因此，在对称Mg/Mg电池和CuS/Mg全电池中都能实现出色的倍率性能。
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