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J. Electrochem. Sci. Technol > Volume 3(3); 2012 > Article
Journal of Electrochemical Science and Technology 2012;3(3):116-122.
DOI: https://doi.org/10.5229/JECST.2012.3.3.116   
A Carbon Nanotubes-Silicon Nanoparticles Network for High Performance Lithium Rechargeable Battery Anodes
Byung Gon Kim, Weon Ho Shin, Soo Yeon Lim, Byung Seon Kong, Jang Wook Choi
Graduate School of EEWS (WCU) and KAIST Institute NanoCentury, Korea Advanced Institute of Science and Technology (KAIST);Graduate School of EEWS (WCU) and KAIST Institute NanoCentury, Korea Advanced Institute of Science and Technology (KAIST);Graduate School of EEWS (WCU) and KAIST Institute NanoCentury, Korea Advanced Institute of Science and Technology (KAIST);KCC Central Research Institute;Graduate School of EEWS (WCU) and KAIST Institute NanoCentury, Korea Advanced Institute of Science and Technology (KAIST);
Abstract
As an effort to address the chronic capacity fading of Si anodes and thus achieve their robust cycling performance, herein, we develop a unique electrode in which silicon nanoparticles are embedded in the carbon nanotubes network. Utilizing robust contacts between silicon nanoparticles and carbon nanotubes, the composite electrodes exhibit excellent electrochemical performance : 95.5% capacity retention after 140 cycles as well as rate capability such that at the C-rate increase from 0.1C to 1C to 10C, the specific capacities of 850, 698, and 312 mAh/g are obtained, respectively. The present investigation suggests a useful design principle for silicon as well as other high capacity alloying electrodes that undergo large volume expansions during battery operations.
Keywords: Silicon, Carbon nanotube, Chemical vapor deposition, Lithium ion battery, Anode
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