Journal
ELECTROCHIMICA ACTA
Volume 192, Issue -, Pages 407-413Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.electacta.2016.02.010
Keywords
Fe2O3 nanosheet arrays; Galvanostatic electrodeposition; Anode materials; Lithium-ion batteries
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Funding
- National Science Fund for Distinguished Young Scholars of China [21225625]
- National Natural Science Foundation of China [21306057]
- Fundamental Research Funds for the Central Universities, SCUT [2013ZM0064]
- Guangxi Natural Science Foundation [2015GXNSFBA139025]
- Australian Research Council (ARC) through the Future Fellow Program [FT140100757]
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The electrode materials with structure stability and binder-free are urgently required for improving the electrochemical performance of lithium-ion batteries. In this work, interconnected alpha-Fe2O3 nanosheet arrays directly grown on Ti foil were fabricated via a facile galvanostatic electrodeposition method followed by thermal treatment. The as-prepared alpha-Fe2O3 has an open network structure constituted of interconnected nanosheets and can be directly used as integrated electrodes for lithium-ion batteries. The alpha-Fe2O3 nanosheet arrays exhibit a high reversible capacity of 986.3 mAh g(-1) at a current density of 100 mA g(-1). Moreover, a reversible capacity of ca. 425.9 mAh g(-1) is achieved even at a superhigh current density of 10 A g(-1), which is higher than the theoretical capacity of commercially used graphite. The excellent performance could be attributed to the efficient electron transport, the large electrode/electrolyte interfaces and the good accommodations for volume expansion from the interconnected nanosheet arrays structure. (C) 2016 Elsevier Ltd. All rights reserved.
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