Binder-free Ge-three dimensional graphene electrodes for high-rate capacity Li-ion batteries

Journal Article · Mon Dec 16 04:00:00 EST 2013 · Applied Physics Letters

DOI:https://doi.org/10.1063/1.4851955· OSTI ID:22253698

Wang, C. D.; Chui, Y. S.; Li, Y. ^[1]

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1. Center of Super-Diamond and Advanced Films (COSDAF) and Department of Physics and Materials Science, City University of Hong Kong, Hong Kong (China)

A binder-free, high-rate Ge-three dimensional (3D) graphene composite was synthesized by directly depositing Ge film atop 3D graphene grown by microwave plasma chemical vapor deposition on Ni substrate. The Ge-3D graphene structure demonstrates excellent electrochemical performance as a lithium ion battery (LIB) anode with a reversible capacity of 1140 mAh g{sup −1} at 1/3C over 100 cycles and 835 mAh g{sup −1} at 8C after 60 cycles, and significantly a discharge capacity of 186 mAh g{sup −1} was still achieved at 32C. The high capacity and outstanding stability of the Ge-3D graphene composite propose it as a promising electrode in high-performance thin film LIBs.

• OSTI ID: 22253698
• Journal Information: Applied Physics Letters, Journal Name: Applied Physics Letters Journal Issue: 25 Vol. 103; ISSN APPLAB; ISSN 0003-6951
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
ANODES
CAPACITY
CHEMICAL VAPOR DEPOSITION
ELECTRIC BATTERIES
ELECTROCHEMISTRY
GRAPHENE
LITHIUM IONS
MICROWAVE RADIATION
PERFORMANCE
THIN FILMS
THREE-DIMENSIONAL CALCULATIONS