Graphene-Based Hybrid Electrode Material for High-Power Lithium-Ion Batteries

Title
Graphene-Based Hybrid Electrode Material for High-Power Lithium-Ion Batteries
Authors
임희대김해겸김성욱홍지현김형섭유정근강기석
Issue Date
2011-06
Publisher
Journal of the Electrochemical Society
Citation
VOL 158, NO 8-A935
Abstract
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.
URI
http://pubs.kist.re.kr/handle/201004/67558
ISSN
0013-4651
Appears in Collections:
KIST Publication > Article
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