热处理温度对花生壳基多孔炭电化学性能影响的研究

Using peanut shell as raw material and KOH as active agent, the structure of porous carbon in peanut shell was regulated by changing the final temperature by carbonization-activation method. The samples were characterized by scanning electron microscopy and nitrogen isothermal adsorption, and the capacitors with porous carbon in peanut shells as electrode materials were electrochemically tested. The electrochemical test of capacitors with porous carbon as electrode material was carried out by using galvanostatic charge-discharge, cyclic voltammetry, AC impedance and cyclic life. The results show that the prepared porous carbon has abundant pore structure and good electrochemical properties, and the final temperature of 600 oC obtained sample PE-600 is at the level of 0.1 A g-1, the current density increases to 5 A g-1, and the specific capacitance still maintains the performance of 253 F g-1, which proves that it has good rate performance, and cycles 4000 times under the condition of 5 A g-1 current density. The specific capacitance is maintained at 96.6%, which is further evidence of its excellent cycling stability.