High Capacity SiAl/C Anode Material for Lithium-ion Batteries

Abstract

Abstract: High capacity anode material SiAl/C composite was prepared by thermal annealing process. Its structure was characterized by XRD and its cyclability and potentiostatic
cycling performance were investigated. The charging and discharging test shows SiAl/C composite possesses higher capacity than carbonaceous
mesophase spherules. And its first irreversible capacity is decreased, comparing with Si/C composite prepared under the same conditions.
It is demonstrated that by adding Al into Si/C composite system, its first Li⁺ insertion depth is suppressed and voltage hysteresis is alleviated.
Obtained SiAl/C composite anode material has a capacity about 600mAh/g for its first Li⁺ insertion and its coulombic efficiency for the first cycle
is up to 85%. And after 25 cycles, its capacity retention can be retained about 90%.

Key words: lithium-ion batteries, anode, composite material, silicon

CLC Number:

TM911

WEN Zhong-Sheng,XIE Xiao-Hua,WANG Ke,YANG Jun,XIE Jing-Ying. High Capacity SiAl/C Anode Material for Lithium-ion Batteries[J]. Journal of Inorganic Materials.

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High Capacity SiAl/C Anode Material for Lithium-ion Batteries

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