Journal
ELECTROCHIMICA ACTA
Volume 259, Issue -, Pages 1030-1036Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.electacta.2017.11.013
Keywords
Core-shell structure; Sulfur doping; Copper/carbon composite; Pseudocapacitor
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Funding
- National Natural Science Foundation of China [NSFC 61071027]
- Fundamental Research Funds for the Central Universities of China [ZYGX2015KYQD014]
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A sulfur doped core-shell structure of copper and activated carbon (S-doped Cu/C) composite was synthesized by a facile water bath process followed by subsequent carbonization. The structure and morphology of the resulting composite were characterized. This core-shell structure consisted by the copper nanosphere and a layer of porous carbon. The data suggested that strong synergistic effects in S-doped Cu core and carbon shell structure prevented dissolution and passivation during the electrochemical processes. The electrochemical performances were studied after the sulfur doping. The assembled pseudocapacitors with S-doped Cu/C materials as anode and Ni-Al LDH materials as cathode exhibited excellent capacitor performances with specific capacitance reaching up to 335 F/g at the discharge current 1 A/g, as well as relevant cycling stability with similar to 83% retention after 500 cycles. Overall, the proposed core-shell structure S-doped Cu/C composite is promising for use as anode material in pseudocapacitors. (c) 2017 Elsevier Ltd. All rights reserved.
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