无机材料学报 ›› 2020, Vol. 35 ›› Issue (1): 86-92.DOI: 10.15541/jim20190277 CSTR: 32189.14.10.15541/jim20190277

所属专题: 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

• 研究论文 • 上一篇    下一篇

Mn3O4@ZnO核壳结构纳米片阵列的可控合成及其在水系锌离子电池中的应用

李孟夏1,陆越2,王利斌1,胡先罗1()   

  1. 1. 华中科技大学 材料科学与工程学院, 武汉 430074
    2. 华中科技大学 中欧清洁与可再生能源学院, 武汉 430074
  • 收稿日期:2019-06-06 修回日期:2019-08-07 出版日期:2020-01-20 网络出版日期:2019-09-20
  • 作者简介:李孟夏(1995-), 女, 硕士研究生. E-mail:limengxia@hust.edu.cn
  • 基金资助:
    国家自然科学基金(51772116)

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)

摘要:

锰基氧化物是一类非常有潜力的水系锌离子电池正极材料, 但是在充放电循环过程中面临结构坍塌而导致容量快速衰减。本研究结合微波水热法和原子层沉积法在碳布上构筑了具有核壳结构的Mn3O4@ZnO纳米片阵列, 经优化ZnO的包覆厚度后, Mn3O4充放电100个循环的容量保持率可以提高至60.3%。ZnO包覆层可以有效维持Mn3O4的结构稳定性, 并且避免其与电解液直接接触而被腐蚀溶解, 从而改善材料的储锌电化学性能。这种核壳状结构的设计为发展高性能水系锌离子电池锰基氧化物正极材料提供了一种有效的思路。

关键词: 核壳结构, 锰基氧化物, 原子层沉积, 微波水热法, 水系锌离子电池

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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