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Crystalline Cu-silicide stabilizes the performance of a high capacity Si-based Li-ion battery anode
| Content Provider | Semantic Scholar |
|---|---|
| Author | Ma, Wenqing Liu, Xizheng Wang, Xi Wang, Zhifeng Zhang, Ruie Yuan, Zhi-Hao Ding, Yi Xiang |
| 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 | PDF HTM / HTML |
| DOI | 10.1039/C6TA08740J |
| Volume Number | 4 |
| Alternate Webpage(s) | http://www.rsc.org/suppdata/c6/ta/c6ta08740j/c6ta08740j1.pdf |
| Alternate Webpage(s) | https://doi.org/10.1039/C6TA08740J |
| Language | English |
| Access Restriction | Open |
| Content Type | Text |
| Resource Type | Article |
