Journal
CHEMICAL ENGINEERING SCIENCE
Volume 181, Issue -, Pages 36-45Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.ces.2018.02.004
Keywords
Biomass carbon; Ginkgo leaf; Activation; Supercapacitor
Categories
Funding
- National Natural Science Foundation of China [51403190]
- Natural Science Foundation of Zhejiang Province of China [LY15E020011]
- Program for Key Science and Technology Team of Zhejiang Province [2013TD17]
- Young Talent Cultivation Project of Zhejiang Association for Science and Technology [2016YCGC019]
- Youth Top-notch Talent Development and Training Program Foundation of Zhejiang AF University
- State Scholarship Fund of China Scholarship Council (CSC)
- 151 Talent Project of Zhejiang Province
- Zhejiang AAMP
- F University Scientific Research Training Program for Undergraduates [101-2013200030]
- Xinmiao Talents Program of Zhejiang Province [2017R412010]
- Zhejiang Province Society of Forestry
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The practical applications of some advanced carbon nanomaterials in supercapacitors are still hampered by the resource scarcity and high cost. It arouses great interest to seek for ample and low-cost substitutes to meet the need of upcoming large-scale productions. The chemical conversion of renewable and abundant biomass provides a good opportunity for the economic and sustainable synthesis of carbon based electrode materials. In this work, activated ginkgo leaf-derived carbons were investigated as porous cheap biomass carbons with utility as supercapacitor electrode materials in the acid electrolyte. The influences of KOH-, ZnCl2-, and H3BO3-activations on the composition, morphology and performance of as-prepared carbons were studied and discussed. Benefiting from the superior electrochemical activity endowed by the hierarchical nano-architecture and abundant oxygen-containing groups, the as-obtained KOH- activated ginkgo leaf-derived carbon material exhibited the best specific capacitance (374F g (1) at 0.5 A g (1)) relative to pristine carbon, ZnCl2-, and H3BO3-activated carbons. And this KOH-activated ginkgo leaf-derived carbon in the two-electrode configuration also demonstrated satisfactory specific capacitance (272F g (1) at 0.2 A g (1)) and cycling reliability. Moreover, these performances also outperform those of some similar carbon materials. (C) 2018 Elsevier Ltd. All rights reserved.
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