Three-dimensional graphene/LiFePO{sub 4} nanostructures as cathode materials for flexible lithium-ion batteries

Journal Article · Tue Oct 15 04:00:00 UTC 2013 · Materials Research Bulletin

DOI:https://doi.org/10.1016/J.MATERRESBULL.2013.05.118· OSTI ID:22285098

Ren, H. M. ^[1]; Huang, Y. Y. ^[2]; Chang, F. H.; Zhang, P. ^[1]

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1. Institute of Rheology Mechanics, Xiangtan University, Hunan 411105 (China)
2. BTR New Energy Materials Inc., Shenzhen 518000 (China)

Graphical abstract: Graphene/LiFePO{sub 4} composites as a high-performance cathode material for flexible lithium-ion batteries have been prepared by using a co-precipitation method to synthesize graphene/LiFePO4 powders as precursors and then followed by a solvent evaporation process. - Highlights: • Flexible LiFePO{sub 4}/graphene films were prepared first time by a solvent evaporation process. • The flexible electrode exhibited a high discharge capacity without conductive additives. • Graphene network offers the electrode adequate strength to withstand repeated flexing. - Abstract: Three-dimensional graphene/LiFePO{sub 4} nanostructures for flexible lithium-ion batteries were successfully prepared by solvent evaporation method. Structural characteristics of flexible electrodes were investigated by X-ray diffraction (XRD), atomic force microscopy (AFM) and scanning electron microscopy (SEM). Electrochemical performance of graphene/LiFePO{sub 4} was examined by a variety of electrochemical testing techniques. The graphene/LiFePO{sub 4} nanostructures showed high electrochemical properties and significant flexibility. The composites with low graphene content exhibited a high capacity of 163.7 mAh g{sup −1} at 0.1 C and 114 mAh g{sup −1} at 5 C without further incorporation of conductive agents.

• OSTI ID: 22285098
• Journal Information: Materials Research Bulletin, Journal Name: Materials Research Bulletin Journal Issue: 10 Vol. 48; ISSN MRBUAC; ISSN 0025-5408
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
CATHODES
COMPOSITE MATERIALS
ELECTRIC BATTERIES
ELECTROCHEMISTRY
ENERGY STORAGE
GRAPHENE
LITHIUM IONS
NANOSTRUCTURES
SCANNING ELECTRON MICROSCOPY
THIN FILMS
X-RAY DIFFRACTION