| Title |
The electrochemical Characteristics on the Anode Material of Lithium Ion Secondary Batteries with Discharge Voltage |
| Authors |
박종광(Park, Jong-Gwang) ; 한태희(Han, Tae-Hui) ; 정동철(Jeong, Dong-Cheol) ; 임성훈(Im, Seong-Hun) ; 한병성(Han, Byeong-Seong) |
| Keywords |
Petroleum cokes ; Molten Caustic Leaching ; Lithium ; Disordered structure |
| Abstract |
A lithium ion secondary battery using carbon as a negative electrode has been developed. Further improvements to increase the cell capacity are expected by modifying the structure of the carbonaceous material. There are hopes for the development of large capacity lithium ion secondary batteries with long cycle, high energy density, high power density, and high energy efficiency. In the present paper, needle cokes from petroleum were examined as an anode of lithium ion secondary battery. Petroleum cokes, MCL(Molten Caustic Leaching) treated in Korea Institute Energy Research, were carbonized at various temperatures of 0, 500, 700, 19700°C at heating rate of 2°C/min for lh. The electrolyte was used lM liPF6 EC/DEC (1:1). The voltage range of charge & discharge was 0.0V(0.05V) ~ 2.0V. The treated petroleum coke at 700°C had an initial capacity over 560mAh.g which beyond the theoretical maximum capacity, 372mAh/g for LiC6. This phenomena suggests that carbon materials with disordered structure had higher cell capacity than that the graphitic carbon materials. |