TY - JOUR
T1 - Carbon-coated porous silicon composites as high performance Li-ion battery anode materials
T2 - Can the production process be cheaper and greener?
AU - Ren, Wenfeng
AU - Wang, Yanhong
AU - Zhang, Zailei
AU - Tan, Qiangqiang
AU - Zhong, Ziyi
AU - Su, Fabing
N1 - Publisher Copyright:
© 2016 The Royal Society of Chemistry.
PY - 2015
Y1 - 2015
N2 - As the most promising next-generation lithium-ion battery anode materials, porous silicon-based materials are attracting great attention nowadays, mainly because of silicon's exceptionally high lithium storage capacity. However, how to realize the large-scale manufacture of these materials at low cost still remains a big challenge. In this work, we report the direct preparation of porous Si materials from metallurgical-grade Si in an autoclave, which is the most environmentally friendly route to produce alkoxysilane monomers in the organic silicon industry. In this reaction, Cu-based catalysts catalyze the reaction of Si particles with alcohols to create a porous structure within Si, followed by carbon deposition via the chemical vapor deposition method. The micro-morphology and -structure of the porous Si materials can be well tuned by adjusting the synthesis conditions. When used as the anode materials for lithium ion batteries, the charge capacity of the obtained porous Si/C materials was 1240 mA h g-1 at a current density of 50 mA g-1 after 50 cycles, much higher than that of the commercial graphite. This work provides an economic and scalable approach to the preparation of porous Si/C anode materials from commercial Si powders for lithium ion batteries.
AB - As the most promising next-generation lithium-ion battery anode materials, porous silicon-based materials are attracting great attention nowadays, mainly because of silicon's exceptionally high lithium storage capacity. However, how to realize the large-scale manufacture of these materials at low cost still remains a big challenge. In this work, we report the direct preparation of porous Si materials from metallurgical-grade Si in an autoclave, which is the most environmentally friendly route to produce alkoxysilane monomers in the organic silicon industry. In this reaction, Cu-based catalysts catalyze the reaction of Si particles with alcohols to create a porous structure within Si, followed by carbon deposition via the chemical vapor deposition method. The micro-morphology and -structure of the porous Si materials can be well tuned by adjusting the synthesis conditions. When used as the anode materials for lithium ion batteries, the charge capacity of the obtained porous Si/C materials was 1240 mA h g-1 at a current density of 50 mA g-1 after 50 cycles, much higher than that of the commercial graphite. This work provides an economic and scalable approach to the preparation of porous Si/C anode materials from commercial Si powders for lithium ion batteries.
UR - http://www.scopus.com/inward/record.url?scp=84951810593&partnerID=8YFLogxK
U2 - 10.1039/c5ta07487h
DO - 10.1039/c5ta07487h
M3 - 文章
AN - SCOPUS:84951810593
SN - 2050-7488
VL - 4
SP - 552
EP - 560
JO - Journal of Materials Chemistry A
JF - Journal of Materials Chemistry A
IS - 2
ER -
