Journal
CARBON
Volume 126, Issue -, Pages 85-92Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.carbon.2017.09.100
Keywords
Electrode materials; Co-doping; Porous carbon; Anode; Lithium
Funding
- National Natural Science Foundation of China [51673117]
- National High-tech RD Program (863) [2015AA03A204]
- Science and Technology Innovation Commission of Shenzhen [JCYJ20140418091413553, JCYJ20150625 102750478, JCYJ20150529164656097, JSGG20160226201833 790, JCYJ20160520163535684, JCYJ20160422144936457]
- Foundation for Distinguished Young Talents in Higher Education of Guangdong, China [2013LYM_0080]
- Special Program for Applied Research on Super Computation of the NSFC-Guangdong Joint Fund
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Ultrahigh level nitrogen and sulfur co-doped disordered porous carbon (NSDPC) was facilely synthesized and applied as anode materials for lithium-ion batteries (LIBs). Benefiting from high nitrogen (14.0 wt%) and sulfur (21.1 wt%) doping, electrode fabricated from NS1/3 showed a high reversible capacity of 1188 mA h g(-1) at 0.1 A g(-1) in the first cycle with a high initial columbic efficiency (> 75%). In addition, prolonged life over 500 cycles and excellent rate capability of 463 mA h g(-1) at 5 A g(-1) have been realized. The preeminent electrochemical performance is attributed to three effects: (1) the high level of sulfur and nitrogen; (2) the synergic effect of dual-doping heteroatoms in cooperation with each other; (3) the large quantity of edge defects and abundant micropores and mesopores that can provide extra Li storage regions. These unique features of NSDPC electrodes suggest that they can serve as a practical substitute for graphite as a high performance anode material in LIBs. (C) 2017 Elsevier Ltd. All rights reserved.
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