期刊
SMALL
卷 15, 期 34, 页码 -出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/smll.201902659
关键词
carbon nanobelts; cathode; nitrogen doping; sodium-ion capacitors; sulfur doping
类别
资金
- National Natural Science Foundation of China [51822210] Funding Source: Medline
- Natural Science Foundation of Hunan Province [2017JJ1008] Funding Source: Medline
- Science and Technology Planning Project of Guangdong Province [2018A050506066] Funding Source: Medline
- Key Research and Development Program of Hunan Province of China [2018GK2031] Funding Source: Medline
- Shenzhen Science and Technology Planning Project [JCYJ20170818153427106, JCYJ20170818153404696, JCYJ20180507182512042] Funding Source: Medline
Sodium-ion capacitors (SICs) have attracted enormous attention due to their high energy density and high power density. In this work, N and S codoped hollow carbon nanobelts (N/S-HCNs) are synthesized by a self-templated method. The as-synthesized carbon nanobelts exhibit excellent performance in pseudocapacitance and electric double layer anions adsorption. After pairing the N/S-HCNs cathode with a tin foil anode in a carbonate electrolyte, the obtained SIC achieves a high specific capacity of 400 mAh g(-1) at 1 A g(-1) (based on the mass of cathode material) and energy density of 250.35 Wh kg(-1) at 676 W kg(-1) (based on the total mass of cathode and anode materials). Besides, the presented SIC also demonstrates high cycling stability with almost 100% capacity retention after 10 000 cycles, which is among the best results of the reported SICs, suggesting the potential for high-performance energy storage applications.
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