TY - JOUR
T1 - Graphite microspheres decorated with Si particles derived from waste solid of organosilane industry as high capacity anodes for Li-ion batteries
AU - Yu, Jing
AU - Zhan, Hanhui
AU - Wang, Yanhong
AU - Zhang, Zailiei
AU - Chen, Han
AU - Li, Hong
AU - Zhong, Ziyi
AU - Su, Fabing
N1 - Copyright:
Copyright 2013 Elsevier B.V., All rights reserved.
PY - 2013
Y1 - 2013
N2 - We report the decoration of commercial graphite microspheres (GMs) with Si particles as anode materials for Li-ion batteries. The Si particles are obtained from solid Si waste of organosilane industry that is acid-washed to remove the impurities and further ground. The GMs with a size of 5-40 μm as main active material, Si particles with a size of 1-10 μm as an additive, and sucrose dissolved in water as a binder are mixed and followed by carbonization to obtain Si/C composites containing graphite, Si, and amorphous carbon generated from sucrose. It is found that the composite containing 60.5 wt% of GMs, 22.1 wt% of Si, and 17.4 wt% of amorphous carbon obtained at 800°C for 5 h shows the best electrochemical performance with a specific capacity of 522.6 mA h g -1 at the current density of 50 mA g-1 and 306.9 mA h g-1 at 500 mA g-1, much higher than those of GMs. Its capacity retention at 500 mA g-1 attains 93.9% after 20 cycles. The work demonstrates the possibility for utilization of the industrial Si waste to enhance graphite anode materials in Li-ion batteries.
AB - We report the decoration of commercial graphite microspheres (GMs) with Si particles as anode materials for Li-ion batteries. The Si particles are obtained from solid Si waste of organosilane industry that is acid-washed to remove the impurities and further ground. The GMs with a size of 5-40 μm as main active material, Si particles with a size of 1-10 μm as an additive, and sucrose dissolved in water as a binder are mixed and followed by carbonization to obtain Si/C composites containing graphite, Si, and amorphous carbon generated from sucrose. It is found that the composite containing 60.5 wt% of GMs, 22.1 wt% of Si, and 17.4 wt% of amorphous carbon obtained at 800°C for 5 h shows the best electrochemical performance with a specific capacity of 522.6 mA h g -1 at the current density of 50 mA g-1 and 306.9 mA h g-1 at 500 mA g-1, much higher than those of GMs. Its capacity retention at 500 mA g-1 attains 93.9% after 20 cycles. The work demonstrates the possibility for utilization of the industrial Si waste to enhance graphite anode materials in Li-ion batteries.
KW - Electrochemical performance
KW - Graphite
KW - Lithium-ion batteries
KW - Silicon waste
KW - Silicon/carbon composite anode
UR - http://www.scopus.com/inward/record.url?scp=84871750082&partnerID=8YFLogxK
U2 - 10.1016/j.jpowsour.2012.11.083
DO - 10.1016/j.jpowsour.2012.11.083
M3 - 文章
AN - SCOPUS:84871750082
VL - 228
SP - 112
EP - 119
JO - Journal of Power Sources
JF - Journal of Power Sources
SN - 0378-7753
ER -