摘要
利用电化学沉积法制备三维石墨烯/氢氧化镍纳米Ni(OH)2/3DGR复合材料,通过扫描电镜对样品进行微观形貌表征;在1.0 mo L/L KOH溶液中利用循环伏安和恒电流充放电等方法对纳米复合材料修饰电极进行电化学性能测试.在2 m A/cm2的电流密度下Ni(OH)2/3DGR的比电容达到43.70 m F/cm2;1000次循环充放电测试表明该复合材料具有较长的使用寿命和稳定性,比电容保持率达到79.3%.因此三维石墨烯/纳米氢氧化镍复合材料可以做为一种很好的超级电容器材料.
The nanocomposite of three-dimensional graphene （3DGR） and nanosized Ni （OH）2 were electrodeposited on the electrode surface, and the surface morphology was characterized by SEM. Electrochemical properties of the prepared Ni （OH） 2/3DGR were investigated by cyclic vohammetry, AC impedance and constant current charge/discharge method in a 1.0 mol/L KOH solution. The stability of the modified electrode was checked by a 1000 times charging/discharging test. All the results indicated that Ni （OH）2/3DGR nanocomposite on the electrode surface exhibited excellent capacitor performanc- es, which could be used as a supercapacitor material.
出处
《海南师范大学学报（自然科学版）》
CAS
2016年第1期44-49,共6页
Journal of Hainan Normal University（Natural Science）
基金
国家自然科学基金(21365010)
海南师范大学校级大学生创新创业训练计划项目(cxcyxj2015011)
关键词
超级电容器
三维石墨烯
氢氧化镍
循环伏安法
充放电
supercapacitor
three-dimensional graphene
nickel hydroxide
cyclic voltammetry
constant current charge/discharge
