Journal
ELECTROCHIMICA ACTA
Volume 90, Issue -, Pages 426-432Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.electacta.2012.11.114
Keywords
Iron oxide-pyrolytic graphite oxide composite; Lithium-ion batteries; Anode materials
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Funding
- Scientific Research Foundation for the Returned Overseas Chinese Scholars, State Education Ministry
- International Science and Technology Cooperation Plan, Science and Technology Bureau of Changchun City [11GH05]
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Fe3O4-pyrolytic graphite oxide (Fe3O4-PGO) composite has been prepared by solvothermal reaction at 200 degrees C. The as-prepared Fe3O4-PGO composite displays excellent cycle stability and rate capability with the initial discharge capacity of 1275 mAh g(-1) and capacity retention of 81% after 50 cycles compared with pure Fe3O4. The reasons are as follows: (i) in situ synthesized Fe3O4 firmly anchors onto the exfoliated PGO sheets, and the PGO acts as a conductive agent to provide a fast path for electron transportation; and (ii) the interstitial cluster structure of microsphere-type Fe3O4 in Fe3O4-PGO composite facilitates more better percolation of the electrolyte, more efficient accommodation with the strain and stress of volume change upon cycling and faster Li-ion transfer. (C) 2012 Elsevier Ltd. All rights reserved.
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