Effect of Amount of Aluminum on the Performance of Si?Al Codeposited Anodes for Lithium Batteries

Title
Effect of Amount of Aluminum on the Performance of Si?Al Codeposited Anodes for Lithium Batteries
Authors
Vaishali PatilArunPatil윤석진최지원
Keywords
Thin Film Anode; X-ray Diffraction; Electrochemical Characterization
Issue Date
2015-11
Publisher
Journal of nanoscience and nanotechnology
Citation
VOL 15, NO 11, 8912-8916
Abstract
Silicon is considered one of the most promising anode materials for high-performance Li-ion batteries due to its 4000 mAh/g theoretical specific capacity, relative abundance, low cost, and environmental benignity. However, silicon experiences a dramatic volume change (∼300%) during full charge/discharge cycling, leading to severe capacity decay and poor cycling stability. Here, we report Si–Al codeposited anode material for Li-ion batteries. The Si–Al thin films were deposited by co-deposition from Si and Al target on nickel substrate. The composition of Si and Al in the film is estimated by energy-dispersive spectroscopy. The XRD and SEM analysis revealed that the Si–Al thin films were amorphous in structure. The electrochemical performance of the Si–Al thin film as anode material for lithium ion battery was investigated by the charge/discharge tests. Galvanostatic half-cell electrochemical measurements were conducted in between 0 mV to 2 V using a Li counter electrode, demonstrating that the Al rich Si–Al thin film achieved a good cycleability up to 100 cycles with a high capacity retention. Si–Al sample having 11.04% Al shows capacity 825 mAh/g over the 100 cycles.
URI
http://pubs.kist.re.kr/handle/201004/50620
ISSN
15334880
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KIST Publication > Article
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