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电化学  2011 

石墨烯对Ni(OH)2超级电容器材料的电化学行为的影响

, PP. 292-299

Keywords: 石墨烯,氢氧化镍纳米粒子,电化学沉积,超级电容器

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Abstract:

研究了氧化缺陷石墨烯对Ni(OH)2电化学性能的增强作用。实验上,由恒电位沉积法在石墨烯基底上制备Ni(OH)2纳米粒子/石墨烯复合材料。TEM观察和电化学测试表明,Ni(OH)2纳米粒子均匀地分散在石墨烯基底上,其粒径为5.0±0.5nm,体系的质量比电容值为1928F?g-1。量化计算结果表明,上述复合材料乃是通过Ni(OH)2与石墨烯表面功能基团的强化学作用相结合而导电,电子则自石墨烯基底经氧化缺陷向Ni(OH)2分子传递,导致Ni(OH)2带负电,从而形成Ni(OH)2纳米粒子的单向导电行为。

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