A Highly Resilient Mesoporous SiOx Lithium Storage Material Engineered by Oil-Water Templating

Title
A Highly Resilient Mesoporous SiOx Lithium Storage Material Engineered by Oil-Water Templating
Authors
김한수
Keywords
batteries; lithium; porous structure; silicon; silicon oxide
Issue Date
2015-03
Publisher
WILEY-V C H VERLAG GMBH
Citation
CHEMSUSCHEM, v. 8, NO 4, Page. 688-694
Abstract
Mesoporous silicon-based materials gained considerable attention as high-capacity lithium-storage materials. However, the practical use is still limited by the complexity and limited number of available synthetic routes. Here, we report carbon-coated porous SiOx as high capacity lithium storage material prepared by using a sol-gel reaction of hydrogen silsesquioxane and oil-water templating. A hydrophobic oil is employed as a pore former inside the SiOx matrix and a precursor for carbon coating on the SiOx. The anode exhibits a high capacity of 730mAhg(-1) and outstanding cycling performance over 100 cycles without significant dimensional changes. Carbon-coated porous SiOx also showed highly stable thermal reliability comparable to that of graphite. These promising properties come from the mesopores in the SiOx matrix, which ensures reliable operation of lithium storage in SiOx. The scalable sol-gel process presented here can open up a new avenue for the versatile preparation of porous SiOx lithium storage materials.
URI
http://onlinelibrary.wiley.com/doi/10.1002/cssc.201402907/fullhttp://hdl.handle.net/20.500.11754/22896
ISSN
1864-5631; 1864-564X
DOI
http://dx.doi.org/10.1002/cssc.201402907
Appears in Collections:
COLLEGE OF ENGINEERING[S](공과대학) > ENERGY ENGINEERING(에너지공학과) > Articles
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