期刊
JOURNAL OF CLEANER PRODUCTION
卷 373, 期 -, 页码 -出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.jclepro.2022.133903
关键词
Cellulose; Supercapacitor; N -Carbon; Hydrothermal carbonization; Ammonium nitrate
资金
- State Key Laboratory of High-efficiency Utilization of Coal and Green Chemical Engineering (China) [2022-K37]
- National Key Research and Development Program of China [2018YFC1901200]
- Jiangsu Key Laboratory of Advanced Catalytic Materials and Technology [BM2012110]
- Zhishan Young Scholar Program of Southeast University
- Fundamental Research Funds for the Central Universities [2242021R41076]
N-carbon material was prepared using hydrothermal carbonization assisted by ammonium nitrate, resulting in improved electrochemical properties for high-energy-density supercapacitors.
N-carbon material was prepared via ammonium nitrate (AN) assisted by hydrothermal carbonization (HTC) of cellulose-derived N-carbon materials to improve the electrochemical properties of supercapacitors. The N-carbon constructed electrode possessed a high specific capacitance of 318 F/g at 1 A/g, excellent cycling stability with 98% capacitance retention after 10,000 cycles, as well as enhanced rate capability in symmetric supercapacitor. During HTC, the improved electrochemical performance was decisively determined by the uniquely designed nitrogen supply, acidic catalyst, and powerful oxidant. Moreover, improving hydrolysis of cellulose to enhance carbonization and high nitrogen doping content of the prepared N-carbon material were the key factors contributing to its improved electrochemical properties. These findings improve the understanding of how cel-lulose appropriately is oxidant assisted HTC to produce N-carbon for applications in high-energy-density supercapacitors.
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