摘要
用活性炭作为超电容器的电极材料,在不同条件下对超电容器进行充放电测试,考察其在不同充电条件下的容量变化。实验发现,微孔活性炭比表面积较大时有储电的优势,电容器在充电电流强度较小时有较大的容量;随着电流强度的增加,充放电容量逐渐降低。不同的充电方式对其储电容量有较大的影响,漏电流是影响双电层电容器性能的一个重要因素。
Activated carbons (AC) were used as the electrode materials for the supercapacitors in an aqueous electrolytic solution. The changes of the double-layer capacitance of the supercapacitors were investigated using the different charge-discharge ways. It was found that the carbon electrodes with a higher porosity had a higher capacitance and better performance in charge and discharge. The data also showed that the values of discharge capacitance of activated carbons decreased with the increase in the charge current density, and the supercapacitors had the different charge-discharge capacities under the different current densities. The influence of the leakage current of the carbon electrodes on the capacitances could not be considered to be negligible.
出处
《电子元件与材料》
CAS
CSCD
北大核心
2003年第12期1-3,6,共4页
Electronic Components And Materials
基金
北京化工大学青年教师基金资助项目(QN0249)
国家自然科学基金资助项目(50272070)
