Journal
JOURNAL OF ALLOYS AND COMPOUNDS
Volume 762, Issue -, Pages 473-479Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.jallcom.2018.05.224
Keywords
Cu9S5/NSC; One-step calcination; Binding effect; Sodium-ion battery
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Funding
- National Natural Science Foundation of China [21701044]
- Natural Science Foundation of Hunan Province China [2017JJ3097]
- Research Foundation of Education Bureau of Hunan Province, China [17A086]
- National Training Programs of Innovation and Entrepreneurship for University Students of China [201710543004]
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Utilizing copper coordination compound as Cu, S, N and C sources, nano-sized Cu9S5 coated with N, S co-doped carbon (NSC) has been prepared via one-step calcination. The uniform nanosize Cu9S5 were well coated by NSC with the thickness of about 4 nm. The Cu9S5/NSC composite as a new anode for sodium-ion battery shows high reversible charge specific capacity of 412.0 mAh g(-1) at 100 mAg(-1) and good capacity retention after 200 cycles, which is attributed to the encapsulated structure and strong binding interaction between Cu9S5 and NSC (bridge bonds of C-S-Cu and C-O-Cu). (C) 2018 Elsevier B.V. All rights reserved.
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