期刊
JOURNAL OF POWER SOURCES
卷 324, 期 -, 页码 233-238出版社
ELSEVIER
DOI: 10.1016/j.jpowsour.2016.05.084
关键词
Mesoporous shell; Nitrogen-doping; Carbon hollow spheres; Polydopamine; Anodes; Lithium ion batteries
资金
- Natural Science Foundation of China (NSFC) [51572100, 51504171, 31500783]
- Hubei Provincial Natural Science Foundation [2015CFA116]
- Fundamental Research Funds for the Central Universities [HUST: 2015QN071]
- Project of Hubei Provincial Education Office [B2015346]
- Outstanding Young and Middle-aged Scientific Innovation Team of Colleges and Universities of Hubei Province [T201402]
- Applied Basic Research Program of Wuhan City [2013011801010598]
Nitrogen-doped mesoporous carbon hollow spheres (N-MCHSs) were prepared using mesoporous silica hollow spheres as template and dopamine as carbon precursor. The N-MCHSs demonstrate high specific surface area and vegetable sponge-like mesoporous shell with interconnected carbon bridges, facilitating continuous electron transport and Li ion diffusion, and making the whole structure more stable. The influence of N contents and N-bonding configuration on the Li storage of N-MCHSs is discussed. The N-MCHSs carbonized at 800 degrees C demonstrate high reversible capacity and excellent rate performance, delivering a capacity of 485 mAh g(-1) at a current of 0.5 A g(-1) after 1,100 cycles. Even up to 4.0 A g(-1), a high capacity of 214 mAh g(-1) can be remained. The high electrochemical performance of N-MCHSs can be ascribed to mesoporous carbon hollow spheres structure and high level pyridinic nitrogen doping. Crown Copyright (C) 2016 Published by Elsevier B.V. All rights reserved.
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