Synthesis of Ni-Co Hydroxide/Graphene Hydrogel Composites with Three-dimensional Network Structure and Their Electrochemical Performance
LIU Tingting1,2,*, TIAN Guoxing3, ZHAO Xin3, YU Xinyong3, MAO Chao3, YU Xuehan3, CHEN Ling3,4,*
1 Northeast Petroleum University at Qinhuangdao, Qinhuangdao 066004, Hebei, China 2 Provincial Key Laboratory of Polyolefin New Materials, College of Chemistry & Chemical Engineering, Northeast Petroleum University, Daqing 163318, Heilongjiang, China 3 Hebei Key Laboratory of Applied Chemistry, College of Environmental and Chemical Engineering, Yanshan University, Qinhuangdao 066004, Hebei, China 4 Hebei Key Laboratory of Heavy Metal Deep-remediation in Water and Resource Reuse, College of Environmental and Chemical Engineering, Yanshan University, Qinhuangdao 066004, Hebei, China
Abstract: In this work, graphene oxide (GO) was prereduced by chemical reduction method, and then mixed with Ni(NO3)2·6H2O and Co(NO3)2·6H2O for hydrothermal reaction to obtain the composites of nickel-cobalt hydroxide/graphene hydrogel with three-dimensional network structure. By adjusting the amount of GO, nickel-cobalt hydroxide/graphene hydrogel (NiCo-OH/GH100) with the best electrochemical performance was acquired, and nickel-cobalt hydroxide nanosheets were distributed on the surface of graphene uniformly. The specific capacitance of NiCo-OH/GH100 was 590 F/g at a current density of 0.5 A/g, and the retention rate was 76.1% when the current density increased to 10 A/g, showing high specific capacitance and good rate performance. The asymmetric supercapacitor (ASC) of NiCo-OH/GH100∥nitrogen-doped graphene hydrogel compounded with carbon nanotube (NCGH) was assembled, and the specific capacitance retention was 92.9% after 10 000 charge-discharge cycles at 20 A/g. The energy density reached 23.9 Wh/kg at the power density of 375 W/kg.
作者简介: 刘亭亭,东北石油大学秦皇岛校区教授、硕士研究生导师。2003年东北师范大学生态学专业本科毕业后到东北石油大学工作至今,2015年燕山大学应用化学专业博士毕业。目前主要从事超级电容器方面的研究工作。发表论文20余篇,包括Materials Letters、Journal of Solid State Chemistry、RSC Advances等。
引用本文:
刘亭亭, 田国兴, 赵欣, 余新勇, 毛超, 于雪寒, 陈玲. 三维网络结构镍钴氢氧化物/石墨烯水凝胶复合材料的合成及电化学性能[J]. 材料导报, 2024, 38(5): 22070064-7.
LIU Tingting, TIAN Guoxing, ZHAO Xin, YU Xinyong, MAO Chao, YU Xuehan, CHEN Ling. Synthesis of Ni-Co Hydroxide/Graphene Hydrogel Composites with Three-dimensional Network Structure and Their Electrochemical Performance. Materials Reports, 2024, 38(5): 22070064-7.
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2024, Vol. 38 
