Graphene-Based Hybrid Electrode Material for High-Power Lithium-Ion Batteries
- Graphene-Based Hybrid Electrode Material for High-Power Lithium-Ion Batteries
- 임희대; 김해겸; 김성욱; 홍지현; 김형섭; 유정근; 강기석
- Issue Date
- Journal of the Electrochemical Society
- VOL 158, NO 8-A935
- Graphene based hybrid electrode material is fabricated from an easy and simple chemical method and is demonstrated as a cathode material for Li rechargeable batteries with high capacity and excellent rate capability. The hybrid material delivers a specific capacity of 156 mAh g1 at a current rate of 25 mA g1 (0.125 C) after 100 cycles with coulombic efficiency of nearly 100%. At elevated current rates, the specific capacity of the hybrid material is over 100 mAh g1 even at a current rate of 2500 mA g1 (12.5 C). The excellent battery performance of the hybrid material is attributed to the easy Li ion and electron transport in the amorphous FePO4/graphene hybrid structure, in which electrochemically active amorphous FePO4 films are directly grown on graphene with superior electronic conductivity.
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