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Reconstructing interfacial manganese deposition for durable aqueous zinc-manganese batteries

National Science Review 2023年第10期10卷 139-150页

作者： Yida Hu Zhexuan Liu Lanyan Li Shan Guo Xuefang Xie Zhigao Luo Guozhao Fang Shuquan Liang School of Materials Science and Engineering Key Laboratory of Electronic Packaging and Advanced Functional Materials of Hunan ProvinceCentral South University School of Science Hunan University of Technology and Business College of Physical Science and Technology Xinjiang University College of Chemistry Xiangtan University

Low-cost,high-satety,and broad-prospect aqueous zinc-manganese batteries(ZMBs) are limited by complex interracial reactions.The solid-liquid interfacial state of the cathode dominates the Mn dissolution/deposition process of aqueous ZMBs,especially the important influence on the mass and charge transfer behavior of Zn2+and Mn2+.We proposed a quasi-eutectic electrolyte(QEE) that would stabilize the reversible behavior of interracial deposition and favorable interracial reaction kinetic of manganese-based cathodes in a long cycle process by optimizing mass and charge transfer.We emphasize that the initial interfacial reaction energy barrier is not the main factor affecting cycling performance,and the good reaction kinetics induced by interfacial deposition during the cycling process is more conducive to the stable cycling of the battery,which has been confirmed by theoretical analysis,quartz crystal microbalance with dissipation monitoring,depth etching X-ray photon-electron spectroscopy,etc.As a result,the QEE electrolyte maintained a stable specific capacity of 250 mAh g-1at 0.5 A g-1after 350 cycles in zinc-manganese batteries.The energy density retention rate of the ZMB with QEE increased by 174%compared to that of conventional aqueous electrolyte.Furthermore,the multi-stacked soft-pack battery with a cathodic mass load of 54.4 mg maintained a stable specific capacity of 200 mAh g-1for 100 cycles,demonstrating its commercial potential.This work proves the feasibility of adapting lean-water QEE to the stable aqueous ZMBs.

关键词： quasi-eutectic electrolyte aqueous zinc −manganese batteries solid −liquid interfacial state mass transfer charge transfer

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