化工进展 ›› 2021, Vol. 40 ›› Issue (3): 1545-1550.DOI: 10.16085/j.issn.1000-6613.2020-0788

• 材料科学与技术 • 上一篇    下一篇

NiMn2O4/还原氧化石墨烯复合材料的制备及其超级电容性能

李明伟(), 杨绍斌   

  1. 辽宁工程技术大学材料科学与工程学院,辽宁 阜新 123000
  • 收稿日期:2020-05-11 出版日期:2021-03-05 发布日期:2021-03-17
  • 通讯作者: 李明伟
  • 作者简介:李明伟(1969—),女,博士,副教授,研究方向为储能材料。E-mail:lnlmw@163.com
  • 基金资助:
    国家自然科学基金(51774175)

Preparation of NiMn2O4/reduced graphene oxide composites and their supercapacitor properties

LI Mingwei(), YANG Shaobin   

  1. College of Materials Science and Engineering, Liaoning Technical University, Fuxin 123000, Liaoning, China
  • Received:2020-05-11 Online:2021-03-05 Published:2021-03-17
  • Contact: LI Mingwei

摘要:

采用水热法制备了NiMn2O4/还原氧化石墨烯(NiMn2O4/rGO)复合电极材料,研究了石墨烯对NiMn2O4/rGO材料形貌、微观结构及电化学性能的影响。结果表明:NiMn2O4纳米片沉积在石墨烯片的表面,聚集现象消失。与纯NiMn2O4相比,NiMn2O4/rGO具有高的比表面积和优良的电化学性能。在1A/g时具有1375F/g的比电容,而纯NiMn2O4的比电容为924F/g。5000次充放电后,NiMn2O4/rGO在5A/g时的比电容保留率为90%,而NiMn2O4的比电容保留率为78%。NiMn2O4/rGO表现出良好的电容性能,作为超级电容器电极材料具有广泛的应用前景。

关键词: 水热, 制备, 复合材料, 纳米材料

Abstract:

NiMn2O4 on reduced graphene oxide (NiMn2O4/rGO) was prepared by the hydrothermal method. The effects of graphene on the microstructure, specific surface area, and capacitance performance of CoMn2O4/rGO materials were studied. The results show that NiMn2O4 nanosheets are deposited on the surface of graphene sheets and the aggregation phenomenon disappeared. Compared with pure NiMn2O4, NiMn2O4/rGO has a high specific surface area and excellent electrochemical properties. It has a specific capacitance of 1375F/g at 1A/g, while that of pure NiMn2O4 is 924F/g. After 5000 charge and discharge, the specific capacitance retention rate of NiMn2O4/rGO at 5A/g is 90%, while that of NiMn2O4 is 78%. NiMn2O4/rGO shows good capacitive properties and has a wide application prospect as an electrode material for supercapacitors.

Key words: hydrothermal, preparation, composites, nanomaterials

中图分类号: 

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