氢氧化镍超级电容器电极材料电流变化规律研究

Study on the Current Variation Rule of Super-capacitor Ni(OH)_2 Electrode Material

用水热法制备了氢氧化镍超级电容器材料,对它的充放电电流强度随时间的变化进行测试分析,确定变化规律的解析式。在此基础上,应用速度反应理论,得到放电电流强度的半衰期tm、衰减常数β随温度等的变化关系。结果表明:充放电过程中的电流强度随时间的变化均具有指数形式,材料放电过程的电流随时间的变化按负指数规律减小,其半衰期、衰减常数,除与反应常数以及生成物与底物的化学势有关外,还与反应室的温度有关:升高反应室的温度,会使半衰期增大。理论与实验结果基本符合。

The Ni（OH）2 electrode materials were prepared by hydrothermal method. Then, the charging and discharging current change with time of the Ni （ OH） 2 material was tested in order to establish the analytic formula of change rule. On this basis, the changing relationship of discharging current half-life （tm） and attenuation constant（β） was made by the theory of velocity reaction. The results show that the charging/discharging current intensity accords to a index law with time. In the process of discharging, the discharging current intensity decreases exponentially with time. The half-life and attenuation constant are not only related to reaction constant and the chemical potential between the reactants and the substrates, but also related to the reaction chamber temperature. As the temperature increasing, the half-life will increase. The results are accord with the experimental results.