储能科学与技术 ›› 2022, Vol. 11 ›› Issue (3): 1019-1025.doi: 10.19799/j.cnki.2095-4239.2021.0542

• 储能新材料设计与先进表征专刊 • 上一篇    下一篇

一种新型水系锌离子电池正极材料NiCo2O4 的制备和电化学性能

吴渺(), 赵贵青, 仇中柱(), 王保峰   

  1. 上海电力大学,上海 201306
  • 收稿日期:2021-10-19 修回日期:2021-11-29 出版日期:2022-03-05 发布日期:2022-03-11
  • 通讯作者: 仇中柱 E-mail:misty96@163.com;qiuzhongzhu@shiep.edu.cn
  • 作者简介:吴渺(1996—),女,硕士研究生,主要从事电池和超级电容器电极材料应用研究工作,E-mail:misty96@163.com
  • 基金资助:
    国家自然科学基金项目(22075173)

Preparation and electrochemical properties of NiCo2O4 as a novel cathode material for aqueous zinc-ion batteries

Miao WU(), Guiqing ZHAO, Zhongzhu QIU(), Baofeng WANG   

  1. Shanghai University of Electric Power, Shanghai 201306, China
  • Received:2021-10-19 Revised:2021-11-29 Online:2022-03-05 Published:2022-03-11
  • Contact: Zhongzhu QIU E-mail:misty96@163.com;qiuzhongzhu@shiep.edu.cn

摘要:

水系锌离子电池的能量密度高、稳定性好、安全系数高。NiCo2O4材料作为双过渡金属氧化物,其导电性能和电化学活性都很出色,本工作首次采用NiCo2O4材料作为水系锌离子电池的正极。采取了溶胶-凝胶法加煅烧热方法制备出立体尖晶石状的NiCo2O4材料,借助扫描电子显微镜(SEM)、透射电子显微镜(TEM)、能谱分析技术(EDS)和电化学技术等表征测试手段,分析这种新型水系锌离子电池正极材料的形貌和电化学性能。结果表明,立体尖晶石状的NiCo2O4材料有着优良的纯度和结晶性,颗粒分散均匀,没有团聚,无杂质且具有良好稳定的充放电性能。电极在100 mA/g电流密度下,首次放电比容量为92 mA·h/g,100圈充放电测试后放电比容量为60 mA·h/g,200圈后,放电比容量保持在44 mA·h/g。但在循环倍率测试中发现,当电流密度较大时,NiCo2O4电极产生了27 mA·h/g的衰减,在一定程度上有着不可逆的冲击破坏。本研究有助于推动水性锌离子电池电极的应用,为高性能水性锌离子电池电极材料的研发提供实验依据。

关键词: 水系锌离子电池, 正极材料, NiCo2O4, 溶胶凝胶法

Abstract:

Aqueous zinc-ion batteries have a high energy density, good stability, and high safety factor; as a double transition metal oxide, NiCo2O4 has excellent electrical conductivity and electrochemical activity. Therefore, herein, NiCo2O4 was novelly used as a novel cathode material for aqueous zinc-ion batteries. The solid spinel NiCo2O4 material was prepared by the sol-gel and calcination heat methods. Using scanning electron microscopy, transmission electron microscope, energy dispersive spectroscopy, and electrochemical technology, the morphology and electrochemical properties of the cathode material of the new aqueous zinc-ion batteries were analyzed. The results show that the spinel NiCo2O4 material has excellent purity and crystallinity, and the particles are evenly dispersed without agglomeration and impurity. Moreover, it has good and stable charge-discharge performance. At a current density of 100 mA·g-1, the initial specific discharge capacity of the electrode is 92 mA·h·g-1, 60 mA·h·g-1 after 100 cycles, and 44 mA·h·g-1 after 200 cycles. However, when the current density is high, the specific capacitance of the NiCo2O4 electrode decreases by 27 mA·h·g-1, which has irreversible impact damage to a certain extent. This study highlights that NiCo2O4 material improves the performance of aqueous zinc-ion batteries, which can guide the future design of aqueous zinc-ion batteries.

Key words: aqueous zinc-ion battery, cathode material, NiCo2O4, sol-gel method

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