期刊
JOURNAL OF POWER SOURCES
卷 319, 期 -, 页码 195-201出版社
ELSEVIER
DOI: 10.1016/j.jpowsour.2016.04.040
关键词
Nitrogen-doped carbon; Graphene; Hybrid material; Anode; Sodium ion battery; Electrochemical performance
资金
- National Key Basic Research and Development Program [2015CB251100]
- National Science Foundation of China [51572011, 21073233, 50802112]
- Fundamental Research Funds for the Central Universities [buctrc201410]
Nitrogen-doped carbon/graphene (NCG) hybrid materials were prepared by an in-situ polymerization and followed pyrolysis for sodium-ion batteries. The NCG has a large interlayer distance (0.360 nm) and a high nitrogen content of 7.54 at%, resulting in a high reversible sodium storage capacity of 336 mAh g(-1) at 30 mA g(-1). The NCG shows a sandwich-like structure, i.e. nitrogen-doped carbon nanosheets closely coated on both sides of graphene. The carbon nanosheets shorten the ion diffusion distance, while the sandwiched graphene with high electronic conductivity guarantees fast electron transport, making the NCG exhibit excellent rate capability (94 mAh g(-1) at 5 A g(-1)). It also exhibits good cycle stability with a capacity retention of 89% after 200 cycles at 50 mA g(-1). (C) 2016 Elsevier B.V. All rights reserved.
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