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

In order to evaluate the effect of temperature on the performance of supercapacitors using coconut shell activated carbon (AC)/carbon nanotubes (CNTs) as nano-composite electrodes, the supercapacitor’s properties were tested in 1mol/L KOH solution at 35°C~60°C.The results indicated, when temperature increased from 35°C to 60°C, the resistance decreased from 0.83Ω to 0.78Ω by 6% and the capacitance increased from 93.32F/g to 104.36F/g by 11.8%. The effects were due to increased conductivity and carbon connectivity provided by the addition 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.