基于3D多孔层状石墨烯/NiOOH/Ni(OH)_2混合电容器的研究  

3D porous layered NiOOH/Ni(OH)_2 grown on graphene for hybrid device

作　　者：夏发军[1] 孙峰 李亚娜[1] 马静[1] 刘春玲[1] 

机构地区：[1]陕西师范大学化学化工学院,陕西西安710062 [2]山东省莱芜市人力资源和社会保障局,山东莱芜271100

出　　处：《电源技术》2016年第11期2210-2213,共4页Chinese Journal of Power Sources

摘　　要：采用液相沉积法制备出一种新型的NiOOH/Ni(OH)_2-石墨烯复合材料(Ni/GNS)。扫描电镜表明,该材料具有三维多孔层状结构。以复合材料Ni/GNS为正极,活性炭(AC)为负极,6 mol/L KOH为电解液组装成混合电容器,该电容器的电压达到1.6 V。两电极测试表明,电流密度为0.2 A/g时,混合电容器的单电极比电容达到404 F/g,比能量为35.8Wh/kg,比功率为662 W/kg,100次循环后容量保持率为70.7%。说明该混合电容器具有较高的比能量和比功率以及良好的循环寿命,这主要是由于Ni/GNS和AC两电极的协同作用。A novel NiOOH/Ni（OH）2-graphene nanosheet （Ni/GNS） composite was fabricated by in situ deposition of NiOOH/Ni（OH）2 on graphene nanosheets through a liquid phase deposition method. SEM shows a 3D porous layered structure. A high-voltage hybrid device was also fabricated using the Ni/GNS composite as the positive electrode, an inexpensive high specific surface area activated carbon （AC） as the negative electrode. The optimized hybrid device could be cycled reversibly in the high-voltage region of 1.6 V and displayed good performance with a maximum specific capacitance of 404 F/g at a current density of 0.2 A/g, a high energy density of 35.8 Wh/kg, and a power density of 662 W/kg. The hybrid device also exhibited an excellent long cycle life along with 70.7% specific capacitance retained after 100 cycles. The good performance could be attributed to the high capacitance of the Ni/GNS positive electrode and the synergistic effect of Ni/GNS and AC electrodes.

关 键 词：NiOOH/Ni(OH)2/石墨烯 活性炭 混合电容器 

分 类 号：TM53[电气工程—电器]