Effect of Temperature on Characteristic of Carbon Nanotube Nano-composite Electrode Supercapacitor

摘要

In order to evaluate the effect of temperature on the performance of supercapacitor using coconut shell activated carbon (AC)/carbon nanotubes (CNTs) as nano-composite electrodes, the supercapacitor's properties were tested in 4mol L~(-1) KOH solution at 35℃～60℃.The results indicated, when temperature increased from 35℃ to 60℃, the resistance decreased from 0.83Ω to 0.78Ω by 6% and the capacitance increased from 93.32F g~(-1) to 104.36F g~(-1) by 11.8%. It was the contribution of high conductivity and the end open ration of CNTs. These results indicated that CNTs-based nano-composite electrode had good performance at high moderate temperature, and would be a promising material for use in low-cost electrical energy storage device.