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 - Funding Information:
The authors gratefully acknowledge the supports from National Natural Science Foundation of China (No. 51272252), Fund of State Key Laboratory of Multiphase Complex Systems (No. MPCS-2012-A-09 ), Hundred Talents Program of the Chinese Academy of Sciences, Priority Academic Program Development of Jiangsu Higher Education Institutions (PAPD) (No. SA1102), and the Fundamental Research Funds for the Central Universities (No. 2012LWB29 ).
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 -
