Journal
ELECTROCHIMICA ACTA
Volume 225, Issue -, Pages 443-451Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.electacta.2016.12.117
Keywords
CuS/Graphene; Microwave-assisted synthesis; Anode; Lithium ion batteries; Kinetics
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Funding
- National Natural Science Foundation of China [21273185, 21321062]
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In this work, CuS/graphene (CuS-G) composite is synthesized via one-pot microwave irradiation method under ambient conditions. As anode material for lithium ion batteries, the CuS-G composite delivers a significantly enhanced reversible capacity and charge/discharge cycle stability compared with pristine CuS. A capacity of 348 mAh g (1) can be maintained after 1000 cycles at the current density of 2.0 Ag (1). Electrochemical impedance spectroscopy (EIS) along with cyclic voltammetry (CV) and galvanostatic intermittent titration technique (GITT) measurements indicate that the incorporation of graphene sheets reduces the contact resistance and enhances lithium ion transfer rate during the electrochemical lithium insertion/extraction remarkably. Thus, as-prepared CuS spheres can be a promising anode material for high performance lithium ion batteries. (C) 2016 Elsevier Ltd. All rights reserved.
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