Journal of Inorganic Materials ›› 2020, Vol. 35 ›› Issue (1): 86-92.DOI: 10.15541/jim20190277

Special Issue: MAX相和MXene材料 离子电池材料 2020年能源材料论文精选(一) :金属离子电池&燃料电池 【虚拟专辑】锂金属电池,钠离子电池和水系电池(2020~2021)

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Controlled Synthesis of Core-shell Structured Mn3O4@ZnO Nanosheet Arrays for Aqueous Zinc-ion Batteries

LI Meng-Xia1,LU Yue2,WANG Li-Bin1,HU Xian-Luo1()   

  1. 1. School of Materials Science and Engineering, Huazhong University of Science and Technology, Wuhan 430074, China
    2. China-EU Institute for Clean and Renewable Energy, Huazhong University of Science and Technology, Wuhan 430074, China
  • Received:2019-06-06 Revised:2019-08-07 Published:2020-01-20 Online:2019-09-20
  • About author:LI Meng-Xia(1995-), female, Master candidate. E-mail:limengxia@hust.edu.cn
  • Supported by:
    National Natural Science Foundation of China(51772116)

Abstract:

Manganese-based oxides are promising cathode materials for zinc-ion batteries. However, these materials often suffer from rapid capacity fade due to structure collapse during charge and discharge processes. Here, we report that core-shell structured Mn3O4@ZnO nanosheet arrays are synthesized on the carbon cloth, combining microwave hydrothermal process with atomic layer deposition. With an optimized thickness of ZnO coating layer, the capacity retention of the as-formed Mn3O4@ZnO nanosheet arrays exhibits 60.3% over 100 discharge-charge cycles at a current density of 100 mA·g -1. It is demonstrated that the introduction of ZnO layers is beneficial to maintain the microstructure and improve the structural stability of the Mn3O4 electrode material during the discharge-charge process, benefiting from avoiding direct contact with the electrolyte. The design of the well-defined core-shell structure provides an effective way to develop high-performance manganese-based oxide cathode materials for zinc-ion batteries.

Key words: core-shell structure, manganese-based oxide, atomic layer deposition, microwave-hydrothermal process, aqueous zinc-ion battery

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