摘要
用络合沉淀法制得Ni(OH)2,经过加热分解得纳米NiO粉末(粒径约30nm)。用该粉末作为活性物质制得的电极具有90～110F/g的比容量。考察了电极的比容量与电解液的浓度、工作电位范围的关系,并讨论了其储存电荷的机理。
Application of the nano-NiO in the electrochemical capacitors was studied. The nano- Ni(OH)2 powder was obtained by mixing aqueous solutions of Ni(NO3) 2 and KOH in the ammonia water. By heating the nano-Ni(OH)2 in 300℃,the nano-NiO was obtained (diameter≈30nm). Using the nano-NiO powders as active material of EC, the electrode can provide a specific capaci- tance of 90～110F/g. The relationship between the specific capacitance and the concentration of the KOH solution and the range of the work potential was studied. The mechanism how the NiO stores charges was discussed.
出处
《功能材料与器件学报》
CAS
CSCD
2002年第1期35-39,共5页
Journal of Functional Materials and Devices
