| A Carbon Nanotubes-Silicon Nanoparticles Network for High Performance Lithium Rechargeable Battery Anodes |
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Byung Gon Kim, Weon Ho Shin, Soo Yeon Lim, Byung Seon Kong, Jang Wook Choi |
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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); |
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| Abstract |
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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. |
| Key Words:
Silicon, Carbon nanotube, Chemical vapor deposition, Lithium ion battery, Anode |
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