期刊
JOURNAL OF ALLOYS AND COMPOUNDS
卷 892, 期 -, 页码 -出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.jallcom.2021.162129
关键词
Porous structure; Solid-state supercapacitor; Biomass-derived carbon
资金
- Foundation of the Hubei Key Laboratory of Biologic Resources of Protection and Utilization, China [2020CFB698]
- National Natural Science Foundation of China, China [21363007, 21661012]
- Incubation Project for High-level Scientific Research Achievements of Hubei Minzu University, China [4205012]
DBFC, derived from a dung beetle forewing, is a promising carbon material for supercapacitor electrodes, showing excellent electrochemical performance. The DBFC-3-700 electrode exhibits high specific capacitance in liquid electrolyte and demonstrates good stability and rate capability when assembled into a solid-state supercapacitor.
Commercial supercapacitors are primarily assembled using carbon materials and biomass-derived carbon is one of the most promising carbon materials in the field of supercapacitors. To meet the growing market demand for energy storage devices, a dung beetle forewing-derived carbon (DBFC) material is first prepared using simple a pyrolysis method. The as-prepared DBFC possesses a hierarchical porous structure, nitrogen and oxygen self-doping, and a large surface area. To investigate its electrochemical performance, the DBFC was used to prepare a supercapacitor electrode. A DBFC electrode prepared with a KOH to biomass-derived carbon mass ratio of 3:1 at 700 degrees C (DBFC-3-700) exhibits a high specific capacitance of 348 F g(-1) at 0.5 A g(-1) in 6 M KOH liquid electrolyte. The DBFC-3-700 electrode was further assembled into a solid-state symmetric super-capacitor that displays a high specific capacitance of 260 F g(-1) at 0.5 A g(-1), good cycle stability, and excellent rate capability. Furthermore, three solid-state supercapacitors connected in series can successfully power red light-emitting diodes, demonstrating potential applications in the field of portable and wearable devices. (C) 2021 Elsevier B.V. All rights reserved.
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