NiMn2O4/还原氧化石墨烯复合材料的制备及其超级电容性能

doi:10.16085/j.issn.1000-6613.2020-0788

摘要/Abstract

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 NiMn₂O₄is 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:

O614

李明伟, 杨绍斌. NiMn₂O₄/还原氧化石墨烯复合材料的制备及其超级电容性能[J]. 化工进展, 2021, 40(3): 1545-1550.

LI Mingwei, YANG Shaobin. Preparation of NiMn₂O₄/reduced graphene oxide composites and their supercapacitor properties[J]. Chemical Industry and Engineering Progress, 2021, 40(3): 1545-1550.

图/表 9

图1 电极制备流程图

图2 材料表征方法示意图

图3 rGO、NiMn2O4与NiMn2O4/rGO的XRD对比图

图4 NiMn2O4和NiMn2O4/rGO的N2吸附-脱附等温曲线和孔径分布曲线

图5 NiMn2O4与NiMn2O4/rGO的SEM图

图6 NiMn2O4/rGO的TEM与HRTE图、NiMn2O4/rGO的SADE图

图7 NiMn2O4与NiMn2O4/rGO在不同扫描速度下的循环伏安(CV)曲线对比图

图8 NiMn2O4与NiMn2O4/rGO在不同电流密度下的恒流充放电曲线图、倍率性能对比图和循环性能对比图

图9 NiMn2O4 与NiMn2O4/rGO的交流阻抗图谱

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NiMn₂O₄/还原氧化石墨烯复合材料的制备及其超级电容性能

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

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