NDLI: Crystalline Cu-silicide stabilizes the performance of a high capacity Si-based Li-ion battery anode

Content Provider	Royal Society of Chemistry (RSC)
Author	Ding, Yi Zhang, Ruie Yuan, Zhihao Ma, Wenqing Wang, Zhifeng Liu, Xizheng Wang, Xi
Copyright Year	2016
Abstract	Metal-silicides have demonstrated bright prospects as advanced anodes for lithium-ion batteries (LIBs). However, their roles in volume change accommodations are still unclear to us. Here, we design and fabricate a nanoporous Si/Cu0.83Si0.17/Cu composite, supported with a highly crystalline Cu-silicide/Cu rigid framework, which demonstrates a high reversible capacity of 820.4 mA h g−1 after 500 cycles at a current density of 3 A g−1. According to the in situ TEM, there was no obvious structural damage and electrode pulverization during the initial lithiation, and a highly crystalline LiCuSi phase was observed. Furthermore, the conversion of the Cu0.83Si0.17/LiCuSi couple during repeated cycles is highly reversible, and the structural integrity could be well maintained. These results demonstrate that the highly crystalline Cu-silicide together with the nanoporous structure contributes to the ultrastable cycle performance and the Cu-silicide/Cu rigid framework supported the superior rate performance. The present work points out a facile but effective strategy for the engineering of alloy type anodes with superior cycle and rate properties for next generation LIBs.
Starting Page	19140
Ending Page	19146
Page Count	7
File Format	HTM / HTML PDF
ISSN	20507488
Volume Number	4
Issue Number	48
Journal	Journal of Materials Chemistry A
DOI	10.1039/c6ta08740j
Language	English
Publisher	Royal Society of Chemistry
Access Restriction	Open
Subject Keyword	Cu Bright Prospects Lithium-ion battery Electric current Transmission electron microscopy Electrode
Content Type	Text
Resource Type	Article
Subject	Chemistry Renewable Energy, Sustainability and the Environment Materials Science

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