Conducting additive-free amorphous Geo?/C composite as a high capacity and long-term stability anode for lithi
By Ngo, Duc Tung; Kalubarme, Ramchandra S.; Le, Hang T. T.; Park, Choong-Nyeon & Park, Chan-Jin
Published in Nanoscale
The Royal Society of Chemistry
2015
Abstract
In this study, a novel method has been proposed for synthesizing amorphous Geo?/C composites. The amorphous Geo?/C composite without carbon black as an electrode for Li-ion batteries exhibited a high specific capacity of 914 mA h g-1 at the rate of C/2 and enhanced rate capability. The amorphous Geo?/C electrode exhibited excellent electrochemical stability with a 95.3% charge capacity retention after 400 charge-discharge cycles, even at a high current charge-discharge of C/2. Furthermore, a full cell employing the Geo?/C anode and the LiCoo? cathode displayed outstanding cycling performance. The superior performance of the Geo?/C electrode enables the amorphous Geo?/C to be a potential anode material for secondary Li-ion batteries.
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