GP/NiOOH/Ni(OH)_2的制备及电化学性能

Preparation and electrochemical performance of GP/NiOOH/Ni(OH)_2

用化学沉积法制备石墨烯（GP）/Ni OOH/Ni（OH）2多层次多孔复合材料。SEM分析发现：Ni OOH/Ni（OH）2在石墨烯表面形成多孔结构,负载了多孔Ni OOH/Ni（OH）2的石墨烯又进行堆积。复合材料的循环伏安测试表现出典型的赝电容特性,比电容高于纯Ni OOH/Ni（OH）2。石墨烯与Ni OOH/Ni（OH）2的配比对电化学性能影响较大,样品GP/Ni-30（石墨烯为0.1 g,1 mol/L Ni SO4为30 ml）的比电容在电流为2 A/g、10 A/g电压为0~0.45 V时分别为2 178 F/g和1 444 F/g。

Hierarchically porous composite graphene / NiOOH / Ni（OH）2was prepared via chemical deposition method. SEM analyses found that the porous composite was formed on the surface of grapheme,then graphene loaded porous graphene / NiOOH / Ni（OH）2was stacked. The composite showed typical pseudo-capacitive behaviors in cyclic voltammetry test,the specific capacitance was higher than pure NiOOH / Ni（OH）2. The match ratio of grapheme and NiOOH / Ni（OH）2had significant influence on the electrochemical performance. The specific capacitance of sample GP / Ni-30（graphene was 0. 1 g,1 mol / LNiSO4 was 30 ml） was 2 178 F / g and 1 444 F / g in the voltage of 0 ~ 0. 45 V and at the current of 2 A / g,10 A / g,respectively.