NiMn_(2)O_(4)/还原氧化石墨烯复合材料的制备及其超级电容性能  

Preparation of NiMn_(2)O_(4)/reduced graphene oxide composites and their supercapacitor properties

作　　者：李明伟[1] 杨绍斌[1] LI Mingwei;YANG Shaobin(College of Materials Science and Engineering,Liaoning Technical University,Fuxin 123000,Liaoning,China)

机构地区：[1]辽宁工程技术大学材料科学与工程学院,辽宁阜新123000

出　　处：《化工进展》2021年第3期1545-1550,共6页Chemical Industry and Engineering Progress

基　　金：国家自然科学基金(51774175)。

摘　　要：采用水热法制备了NiMn_(2)O_(4)/还原氧化石墨烯(NiMn_(2)O_(4)/rGO)复合电极材料,研究了石墨烯对NiMn_(2)O_(4)/rGO材料形貌、微观结构及电化学性能的影响。结果表明:NiMn_(2)O_(4)纳米片沉积在石墨烯片的表面,聚集现象消失。与纯NiMn_(2)O_(4)相比,NiMn_(2)O_(4)/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NiMn_(2)O_(4)的比电容为924F/g。5000次充放电后,NiMn_(2)O_(4)/rGO在5A/g时的比电容保留率为90%,而NiMn_(2)O_(4)的比电容保留率为78%。NiMn_(2)O_(4)/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。NiMn_(2)O_(4) on reduced graphene oxide(NiMn_(2)O_(4)/rGO)was prepared by the hydrothermal method.The effects of graphene on the microstructure,specific surface area,and capacitance performance of CoMn_(2)O_(4)/rGO materials were studied.The results show that NiMn_(2)O_(4) nanosheets are deposited on the surface of graphene sheets and the aggregation phenomenon disappeared.Compared with pure NiMn_(2)O_(4),NiMn_(2)O_(4)/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 NiMn_(2)O_(4) is 924F/g.After 5000 charge and discharge,the specific capacitance retention rate of NiMn_(2)O_(4)/rGO at 5A/g is 90%,while that of NiMn_(2)O_(4) is 78%.NiMn_(2)O_(4)/rGO shows good capacitive properties and has a wide application prospect as an electrode material for supercapacitors.

关 键 词：水热 制备 复合材料 纳米材料 

分 类 号：O614[理学—无机化学]