Journal
ENERGY
Volume 101, Issue -, Pages 9-15Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.energy.2016.01.059
Keywords
Nickel catalytic graphitized; Nitrogen doped carbon; Porous carbon; Supercapacitor
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Funding
- Development of high value carbon based adsorbents from thermochemically produced biochar USDA-NIFA Agriculture and Food Research Initiative Sustainable Bioenergy Program [2011-67009-20030]
- NSF EPSCoR Track II Dakota BioCon Center [1462389]
- Characterization Facility, University of Minnesota, NSF through the MRSEC program
- National Science Foundation [CMMI-1462389]
- US Department of Energy Bioenergy Technologies Office award through the North Central Regional Sun Grant Center at South Dakota State University [DE-FG36-08GO88073]
- NIFA [579892, 2011-67009-20030] Funding Source: Federal RePORTER
- Directorate For Engineering
- Div Of Civil, Mechanical, & Manufact Inn [1536209] Funding Source: National Science Foundation
- Office of Integrative Activities
- Office Of The Director [1330842] Funding Source: National Science Foundation
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Whey-protein-derived nitrogen-doped porous carbon has been prepared by preliminary carbonization at 400 degrees C and final KOH activation at 700 degrees C combined with catalytic graphitization. Physical characterization indicated that the nitrogen-doped activated electrode material had a large specific surface area (2536 m(2) g(-1)) and plenty of interconnected cavities, which greatly improved the performance of supercapacitors. Electrochemical measurements demonstrated that the as-prepared activated electrode material had exceptionally high capacitance of 248 F g(-1) at charge/discharge current density of 0.1 A g(-1). Moreover, the prepared supercapacitors exhibited ideal capacitive behavior with nearly no capacitance loss in 6 mol L-1 KOH at different charge/discharge current densities ranging from 0.1 to 5 A g(-1) after 1000 charge/discharge cycles. The derived energy density was 12.4 Wh kg(-1) at a power density of 495 W kg(-1) under operational conditions. These results suggested that the whey-protein-derived porous carbon is a promising supercapacitor electrode material. (C) 2016 Elsevier Ltd. All rights reserved.
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