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以NaBH4为还原剂,采用成核晶化隔离法和氧化还原法相结合低温下制备了Ni(OH)_2/石墨烯纳米复合材料,并以此为电极研究了其电化学性能。实验发现:六方形片状结构的β-Ni(OH)_2成功地分散在石墨烯载体表面,石墨烯片层结构没有发生团聚及严重的堆垛现象,提高了电极的稳定性。当石墨烯与Ni(OH)_2的质量比为5∶5时,显示了最佳的电化学性能:在0~0.47V的电位窗口,1A/g的电流密度下,比电容高达922F/g。
Electrochemical performance of Ni (OH) _2 / graphene nanocomposites was prepared by the combination of nucleation crystallization isolation method and redox method with NaBH4 as reducing agent at low temperature. It was found that β-Ni (OH) _2 with hexagonal platelet structure was successfully dispersed on the surface of graphene support without agglomeration and serious stacking of graphene sheets, which improved the stability of the electrode. When the mass ratio of graphene to Ni (OH) 2 was 5: 5, the best electrochemical performance was obtained: the specific capacitance was as high as 922F / g at a current window of 0 ~ 0.47V at a current density of 1 A / g .