ABRLAB Publications

Journal Articles

Graphene-based hybrid electrode material for high-power lithium-ion batteries
Year
2011
Author
Haegyeom Kim, Sung-Wook Kim, Jihyun Hong, Hee-Dae Lim, Hyung Sub Kim, Jung-Keun Yoo, Kisuk Kang
Journal
Journal of the Electrochemical Society
Publisher
IOP Publishing
Vol
158
Page
A930
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 g−1 at a current rate of 25 mA g−1 (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 g−1 even at a current rate of 2500 mA g−1 (∼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.