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

Authors
Patil, VaishaliArunPatilYoon, Seok-JinChoi, Ji-Won
Issue Date
2015-11
Publisher
AMER SCIENTIFIC PUBLISHERS
Citation
JOURNAL OF NANOSCIENCE AND NANOTECHNOLOGY, v.15, no.11, pp.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 (similar to 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.
Keywords
LI-ION BATTERIES; RECHARGEABLE BATTERIES; ELECTROCHEMICAL CHARACTERISTICS; HIGH-CAPACITY; ALLOYS; FILMS; ELECTRODES; LI-ION BATTERIES; RECHARGEABLE BATTERIES; ELECTROCHEMICAL CHARACTERISTICS; HIGH-CAPACITY; ALLOYS; FILMS; ELECTRODES; Thin Film Anode; X-ray Diffraction; Electrochemical Characterization
ISSN
1533-4880
URI
https://pubs.kist.re.kr/handle/201004/124838
DOI
10.1166/jnn.2015.11547
Appears in Collections:
KIST Article > 2015
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