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Freestanding silicon/carbon nanofibers composite membrane as a flexible anode for Li-Ion battery.
- Source :
-
Journal of Power Sources . Nov2018, Vol. 403, p103-108. 6p. - Publication Year :
- 2018
-
Abstract
- Abstract A flexible freestanding Si/Carbon nanofibers composite membrane with high mechanical strength is prepared by electrospinning and chemical vapor deposition techniques. The physical characteristics of Si/Carbon nanofibers are characterized by scanning electron microscopy, thermo-gravimetric analysis, X-ray diffraction and transmission electron microscopy. The electrochemical performances are investigated by galvanostatic charge-discharge tests and cyclic voltammograms. Carbon nanofibers matrix shows uniform diameter, smooth surface and three dimensional network structures. Si shell with a thickness of 50 nm is uniformly deposited on the surface of carbon nanofibers. The as-synthesized Si/Carbon nanofibers anode delivers 1310 mAh g−1 at 2nd cycle and the loss rate of capacity per cycle is as lower as 0.0703% from 2nd to 480th cycles, which exhibits excellent electrochemical performance. It demonstrates that the structure of three dimensional network membrane that has played an important role in alleviating volume expansion-contraction of Si-based anodes during charge-discharge process. Highlights • The composite membrane is obtained by electrospinning and chemical vapor deposition. • The novel composite membrane is prepared for the flexible anode in LIBs. • High capacity and good cyclability are achieved as the novel composite anode. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 03787753
- Volume :
- 403
- Database :
- Academic Search Index
- Journal :
- Journal of Power Sources
- Publication Type :
- Academic Journal
- Accession number :
- 132364548
- Full Text :
- https://doi.org/10.1016/j.jpowsour.2018.09.086