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Carbon Fibers as Three-Dimensional Current Collectors for Silicon/Reduced Graphene Oxide Lithium Ion Battery Anode with Improved Rate Performance and Cycle Life

Abstract

A lithium ion battery (LIB) anode is prepared consisting of silicon and reduced graphene oxide (Si/r-GO) composite deposited on a three-dimensional (3D) carbon fibers (CF) current collector. The morphology, structure and textural properties of the as-prepared Si, Si/r-GO composite and Si/r-GO/CF electrode are characterized by scanning electron microscopy, X-ray diffraction and N2 adsorption-desorption isotherms, respectively. The reversible capacity of the Si/r-GO/CF electrode (>1000 mAhg-1 at a 0.1 C rate) is found to be significantly higher than of a Si/r-GO electrode with a traditional 2D copper foil collector. Moreover, the Si/r-GO/CF electrode exhibits an excellent rate performance of 280 mAhg-1 even at a 10 C rate due to the effective conductivity improvement and a capacitor-like behavior offered by the CF networks. In addition, the Si/r-GO/CF coin cell shows a low resistance of 20 Ω in charge transfer. Finally, the CF skeleton serves as a solid scaffold, which inhibits the aggregation of the Si/r-GO composite during usage, and therefore leads to a long cycle life (i.e., a capacity retention of more than 95% after 100 cycles).

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Publication details

The article was received on 14 Mar 2018, accepted on 11 Apr 2018 and first published on 11 Apr 2018


Article type: Paper
DOI: 10.1039/C8NJ01137K
Citation: New J. Chem., 2018, Accepted Manuscript
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    Carbon Fibers as Three-Dimensional Current Collectors for Silicon/Reduced Graphene Oxide Lithium Ion Battery Anode with Improved Rate Performance and Cycle Life

    C. Hsu, H. Lin, Y. Liu and H. Lin, New J. Chem., 2018, Accepted Manuscript , DOI: 10.1039/C8NJ01137K

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