期刊
NANOMATERIALS
卷 9, 期 9, 页码 -出版社
MDPI
DOI: 10.3390/nano9091203
关键词
sodium-ion batteries; N/S co-doped; carbon; anode materials; porous; bagasse
类别
资金
- Natural Science Foundation of Anhui Province [1808085QE124, 1808085MB40]
- Natural Science Foundation of Anhui Province Educational Committee [KJ2018A0548]
- Key Projects of Research and Development Program of Anhui Provence [201904b11020040]
- Talent Scientific Research Foundation of Hefei University [16-17RC15, 16-17RC10, 16-17RC07]
Heteroatom doping is considered to be an efficient strategy to improve the electrochemical performance of carbon-based anode materials for Na-ion batteries (SIBs), due to the introduction of an unbalanced electron atmosphere and increased electrochemical reactive sites of carbon. However, developing green and low-cost approaches to synthesize heteroatom dual-doped carbon with an appropriate porous structure, is still challenging. Here, N/S-co-doped porous carbon sheets, with a main pore size, in the range 1.8-10 nm, has been fabricated through a simple thermal treatment method, using KOH-treated waste bagasse, as a carbon source, and thiourea, as the N and S precursor. The N/S-co-doped carbon sheet electrodes possess significant defects, high specific surface area, enhanced electronic conductivity, improved sodium storage capacity, and long-term cyclability, thereby delivering a high capacity of 223 mA h g(-1) at 0.2 A g(-1) after 500 cycles and retaining 155 mA h g(-1) at 1 A g(-1) for 2000 cycles. This work provides a low-cost route to fabricate high-performance dual-doped porous carbonaceous anode materials for SIBs.
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