Facile synthetic strategy to uniform Cu^sub 9^S^sub 5^ embedded into carbon: A novel anode for sodium-ion batteries

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...

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Bibliographic Details
Published in:Journal of alloys and compounds 2018-09, Vol.762, p.473
Main Authors: Jing, Mingjun, Li, Fangyi, Chen, Mengjie, Zhang, Jiaheng, Long, Fengliang, Jing, Luming, Lv, Xiaopei, Ji, Xiaobo, Wu, Tianjing
Format: Article
Language:English
Subjects:
Alloys
Anodes
Batteries
Bonding strength
Carbon
Coordination compounds
Copper
Copper compounds
Ions
Rechargeable batteries
Sodium
Sodium-ion batteries
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Summary: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 mA g−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).
ISSN:0925-8388
1873-4669