Journal
JOURNAL OF POWER SOURCES
Volume 378, Issue -, Pages 499-510Publisher
ELSEVIER
DOI: 10.1016/j.jpowsour.2017.12.076
Keywords
Biomass; Carbon material; N&P-doping; Electrochemical capacitor; Porous structure
Funding
- National Natural Science Foundation of China [51203071, 51463012, 51763014]
- China Postdoctoral Science Foundation [2014M552509, 2015T81064]
- Natural Science Funds of the Gansu Province [1506RJZA098]
- Program for Hongliu Distinguished Young Scholars in Lanzhou University of Technology [J201402]
- Opening Foundation of State Key Laboratory of Advanced Processing and Recycling of Non Ferrous Metals [SKLAB02015001]
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In this work, biomass pomelo peel is used to fabricate the porous activated carbon microsheets, and diammonium hydrogen phosphate (DHP) is employed to dual-dope carbon with nitrogen and phosphorus elements. With the benefit of DHP inducement and dual-doping of nitrogen and phosphorus, the prepared carbon material has a higher carbon yield, and exhibits higher specific surface area (about 807.7 m(2)/g), and larger pore volume (about 0.4378 cm(3)/g) with hierarchically structure of interconnected thin microsheets compared to the pristine carbon. The material exhibits not only high specific capacitance (240 F/g at 0.5 A/g), but also superior cycling performance (approximately 100% of capacitance retention after 10,000 cycles at 2 A/g) in 2 M KOH aqueous electrolyte. Furthermore, the assembled symmetric electrochemical capacitor in 1 M Na2SO4 aqueous electrolyte exhibits a high energy density of 11.7 Wh/kg at a power density of 160 W/kg.
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