CHẾ VẬT LIỆU NANO CARBON TỪ THAN CỐC ĐỊNH HƯỚNG ỨNG DỤNG LÀM ANODE TRONG PIN Li-ION

Tóm tắt

Successfully fabricated porous carbon (CDC) nanomaterials from coke (CD) by Hummer method. The
fabricated nanomaterials are porous, with an average size of 30 - 40 nm. CDC electrode works well, stably
with capacitance retention of 74.7% after 1000 cycles. The constant current discharge method determined
the CDC specific capacitance to be 118 F/g corresponding to a current density of 0.01 A. The specific
capacitance decreased with increasing current density. CDC electrodes conducted electricity well. The
charge transfer resistance was very small. The results on the electrochemical properties of the material
showed that the energy storage capacity of the CDC material was good and stable.