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

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.
Authors:
; ; ;  [1] ;  [1] ;  [2]
  1. Center of Super-Diamond and Advanced Films (COSDAF) and Department of Physics and Materials Science, City University of Hong Kong, Hong Kong (China)
  2. (China)
Publication Date:
OSTI Identifier:
22253698
Resource Type:
Journal Article
Resource Relation:
Journal Name: Applied Physics Letters; Journal Volume: 103; Journal Issue: 25; Other Information: (c) 2013 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
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