期刊
JOURNAL OF POWER SOURCES
卷 246, 期 -, 页码 117-123出版社
ELSEVIER
DOI: 10.1016/j.jpowsour.2013.07.059
关键词
Lithium ion battery; High capacity anode; Nickel silicide nanowire; Heterogenous nanowire; Metal induced growth
资金
- New York State Energy Research Development Authority (NYSERDA) Advance Clean Power Technologies [23640 PO 27292]
- National Science Foundation (NSF) [917899]
We report the influence of nickel catalyst layer thickness when growing nickel suicide alloy nanowires below the liquefaction temperature through metal induced growth. Three different catalyst layer thicknesses show three different nanowire growth results that vary significantly the performance when used as an anode in a lithium ion solution. The thicker catalyst layers (70 rim) show pure NiSi nanowires which have an initial capacity of 1300 mAh g(-1) that degrades to 550 mAh g(-1) within 90 cycles. The thinner (30 nm thick) layer shows a heterogenous nanowire morphology comprising of a multicrystalline NiSi2 inside core and a Ni doped SiO amorphous shell with initial Li-ion capacity of 1727 mAh g(-1) capacity that increases to 2468 mAh g(-1) after 90 cycles. Samples with no catalyst layers were shown to grow pure silicon nanowires with poor surface coverage having an initial capacity of 1779 mAh g(-1) that falls to 242 mAh g(-1) after 90 cycles. (C) 2013 Elsevier B.V. All rights reserved.
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