Journal
ELECTROCHIMICA ACTA
Volume 232, Issue -, Pages 465-473Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.electacta.2017.03.003
Keywords
Cobalt phosphide; Cobalt; Graphene; Hollow nanospheres; Lithium ion battery Anodes
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Funding
- National Key Research Program of China [2016YFA0202602]
- National Natural Science Foundation of China [51371154, 51571167]
- Fundamental Research Funds for the Central Universities of China [20720160082]
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The fabrication of Co2P-Co (Co-P composites) hollow nanospheres with graphene sheets decoration through one-pot solution approach is demonstrated and their potential as the anode materials for lithium ion batteries is assessed. A large specific capacity of 929 mA h g(1) can be retained for Co-P/graphene nanocomposites at 100 mAg(1) after 200 cycles. When cycled at a large current density of 2.0C, the Co-P/ graphene nanocomposites deliver a decent reversible capacity of 567 mA h g(1), which is much higher than the theoretical capacity of traditional graphite anode (372 mAh g 1). The obviously enhanced lithium storage properties of Co-P/graphene nanocomposites are put down to the dual modification of graphene sheets and metal Co as well as their hollow structures. (C) 2017 Elsevier Ltd. All rights reserved.
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