Journal
SCIENCE BULLETIN
Volume 62, Issue 12, Pages 841-845Publisher
SCIENCE PRESS
DOI: 10.1016/j.scib.2017.05.019
Keywords
Biomass; Carbonaceous aerogel; Layered double hydroxide; Supercapacitor
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Funding
- National Natural Science Foundation of China [21333009, 21273244, 21573245]
- Youth Innovation Promotion Association of Chinese Academy of Sciences [2017049]
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Conversion of waste biomass to valuable carbonaceous material is a sustainable and environmental benign method for energy and reduction of greenhouse gas emission. Herein, a two-step hydrothermal method was developed to fabricate high performance electrode material from pomelo peels. In the first step, the pomelo peels were transformed to carbonaceous aerogel (CA), which constructed of three-dimensional, sponge-like brown monolith with hierarchical pores, low-density (0.032 g/cm(3)) and excellent mechanical flexibility. Then, the cobalt nickel aluminum layered double hydroxide (CoNiAl-LDH) was in situ loaded on the surface of CA to form exquisite core-shell structure (CoNiAl-LDH@CA) through the second hydrothermal step. When used as an electrode material for supercapacitor, CoNiAl-LDH@CA exhibited high specific capacitances of 1,134 F/g at 1 A/g and 902 F/g at 10 A/g, respectively. Furthermore, they displayed an excellent cycling stability without an obvious capacitance decrease after 4,000 cycles. (C) 2017 Science China Press. Published by Elsevier B.V. and Science China Press. All rights reserved.
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