Journal
ADVANCED POWDER TECHNOLOGY
Volume 29, Issue 9, Pages 2097-2107Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.apt.2018.05.018
Keywords
Cotonier strobili fibers; Activated carbon tube; Hierarchical porous structure; Electrochemical behavior; Supercapacitors
Categories
Funding
- National Natural Science Foundation of China [U1304203]
- Natural Science Foundation of Henan Province [162300410258]
- Foundation of Henan Educational Committee [16A150046]
- College Science and Technology Innovation Team of Henan Province [16IRTSTHN001]
- 111 Project [B12015]
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As supercapacitor electrode materials, the sustainable biomass-derived activated carbons have attracted a great deal of attentions due to their low-cost, abundant, and unwanted natural wastes. In this work, a facile KOH activation method is adopted to prepare activated carbon tubes from the biomass waste-cotonier strobili fibers for the first time. The resultant PTAC-x materials possess highly accessible surface areas and abundant micro-mesopores, which benefit large ion storage and high-rate ion transfer. The optimized material denoted as PTAC-6 demonstrates a high specific capacity (346.1 F g(-1) at 1 A g(-1)) and a superior rate performance (214.5 F g(-1) at 50 A g(-1)) in the three-electrode supercapacitors. In addition, the symmetric supercapacitor exhibits excellent cycling stability with a capacitance retention of 84.21% and a columbic efficiency of nearly 100% after 10,000 cycles. Furthermore, the PTAC-6-based symmetric supercapacitor gives a remarkable specific energy of 33.04 Wh kg(-1) at 160 W kg(-1). Meanwhile, our proposed porous activated carbon tubes provide a green and low-cost electrode material for high-performance supercapacitors. (C) 2018 The Society of Powder Technology Japan. Published by Elsevier B.V. and The Society of Powder Technology Japan. All rights reserved.
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