期刊
NANO ENERGY
卷 15, 期 -, 页码 746-754出版社
ELSEVIER
DOI: 10.1016/j.nanoen.2015.05.038
关键词
Sodium-ion battery; Sulfur doped graphene; Covalent bonding; Nanoporous; Long stability; High rate
类别
资金
- Natural Sciences and Engineering Research Council of Canada (NSERC), University of Waterloo
- Waterloo Institute for Nanotechnology
Na-ion battery is playing an important role as a low-cost alternative power source to Li-ion battery. Developing novel carbonaceous anode materials is highly demanded for high performance and environmental benignity. We report, for the first time, the graphene sheets covalently bonded with sulfur atoms as Na-ion battery anode material with a large reversible capacity of 291 mA h g(-1) and an outstanding rate capability with 127 and 83 mA h g(-1) at 2.0 and 5.0 A g (charging/discharging in 3.8 and 1 min, respectively), and a long cycling stability as well. Both experiment and density functional theory calculation proves that the superior performance is mainly attributed to the unique nanoporous structure stemmed from the chemically S doping. This material holds great promise in future application of low cost, high-performance Na-ion batteries. (C) 2015 Elsevier Ltd. All rights reserved.
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