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Choi, Nam-Soon
Energy Materials Lab
Research Interests
  • Rechargeable lithium battery, electrolytes for next generation Mg and Na battery

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Control of Interfacial Layers for High-Performance Porous Si Lithium-Ion Battery Anode

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Title
Control of Interfacial Layers for High-Performance Porous Si Lithium-Ion Battery Anode
Author
Park, HyungminLee, SungjunYoo, SeungminShin, MyoungsooKim, JieunChun, MyungjinChoi, Nam-SoonPark, Soojin
Issue Date
2014-09
Publisher
AMER CHEMICAL SOC
Citation
ACS APPLIED MATERIALS & INTERFACES, v.6, no.18, pp.16360 - 16367
Abstract
We demonstrate a facile synthesis of micrometer-sized porous Si particles via copper-assisted chemical etching process. Subsequently, metal and/or metal silicide layers are introduced on the surface of porous Si particles using a simple chemical reduction process. Macroporous Si and metal/metal silicide-coated Si electrodes exhibit a high initial Coulombic efficiency of similar to 90%. Reversible capacity of carbon-coated porous Si gradually decays after 80 cycles, while metal/metal silicide-coated porous Si electrodes show significantly improved cycling performance even after 100 cycles with a reversible capacity of >1500 mAh g(-1). We confirm that a stable solid-electrolyte interface layer is formed on metal/metal silicide-coated porous Si electrodes during cycling, leading to a highly stable cycling performance.
URI
https://scholarworks.unist.ac.kr/handle/201301/9412
URL
http://www.scopus.com/inward/record.url?partnerID=HzOxMe3b&scp=84912051272
DOI
10.1021/am5046197
ISSN
1944-8244
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ECHE_Journal Papers
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