Journal
JOURNAL OF ENERGY STORAGE
Volume 39, Issue -, Pages -Publisher
ELSEVIER
DOI: 10.1016/j.est.2021.102640
Keywords
Shaddock peel; Activated carbon; Supercapacitor; Electrode material; Capacitance characteristics
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Funding
- Science and Technology Planning Project of Quanzhou City [2019C016R]
- Science and Technology Development Projects of the Central Committee Guidance Local [2018L3015]
- Quangang Petrochemical Research Institute of the Fujian Normal University [2019YJY07, 2015YJY17]
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Nitrogen doping can improve the electrochemical properties of activated carbon, but excessive doping may decrease the specific surface area. The nitrogen-doped shaddock peel-based activated carbon prepared in this study exhibited excellent mass specific capacity and cycling stability in potassium hydroxide electrolyte.
Nitrogen doping can effectively protect the pore structure of carbon materials and improve their electrochemical properties. In this work, shaddock peel-based activated carbon doped with nitrogen was obtained by a high temperature nitriding method using dopant urea. The activated carbon was characterized and tested by XRD, SEM, TEM, BET, XPS, etc. The results show that with the increase of nitrogen doping ratio, the specific surface area (SSA) of activated carbon first increases and then decreases. The SSA of activated carbon doped with triple urea is 2450.6 m(2)/g. The SSA increased by 26.7%. In the 6 M potassium hydroxide electrolyte, served as the electrode, the mass specific capacity of activated carbon doped with triple urea under the current density of 1A/g reaches 325 F/g and an outstanding cycling stability (292 F/g after 10,000 cycles).
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