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研究了在Ni(NO3)2和Co(NO3)2乙醇溶液中电沉积与烧结制备掺杂C, Co的纳米NiO电极及其电容性能. 结果表明, 在0.5 mol/L硝酸盐乙醇溶液(Ni(NO3)2和Co(NO3)2摩尔比为8︰2)中, 以泡沫镍为阴极进行电沉积, 300℃烧结2 h, 获得的沉积物性能最佳. 分析结果表明, 所得产物基本组成相为NiO, 其中掺杂有C, Co, 其粒子形貌呈球状, 粒径在20 ~30 nm之间, 晶粒尺寸在4 ~5 nm之间. 将其组装成C/NiO模拟超级电容器, 在充放电电流为5 mA的条件下, 单电极比容量可达410 F/g, 30次循环后仍有380 F/g, 其比容量数值随循环次数增加逐渐趋于稳定.
The electrodeposition and sintering of Ni (NO3) 2 and Co (NO3) 2 in ethanol were studied to prepare nano-NiO electrode doped with C and Co and their capacitance properties were investigated. The results showed that in the 0.5 mol / L nitrate ethanol solution (NO3) 2 and Co (NO3) 2 molar ratio of 8: 2), the electrodeposition was carried out by using nickel foam as cathode, and the best deposit was obtained by sintering at 300 ℃ for 2 h.The analysis results showed that the basic composition Phase is NiO doped with C and Co, the particle morphology is spherical, the particle size is between 20 ~ 30 nm, the grain size is between 4 ~ 5 nm, which is assembled into C / NiO analog supercapacitor , The specific capacity of the single electrode reaches 410 F / g at the charge and discharge current of 5 mA, and 380 F / g after 30 cycles. The specific capacitance value tends to be stable as the number of cycles increases.