Title: Cellulose nanofibril/reduced graphene oxide/carbon nanotube hybrid aerogels for highly flexible and all-solid-state supercapacitors
Author: Zheng, Qifeng; Cai, Zhiyong; Ma, Zhenqiang; Gong, Shaoqin;
Source: ACS Applied Materials & Interfaces 2015, 7
Publication Series: Scientific Journal (JRNL)
Description: A novel type of highly flexible and all-solid-state supercapacitor that uses cellulose nanofibril (CNF)/reduced graphene oxide (RGO)/carbon nanotube (CNT) hybrid aerogels as electrodes and H2SO4 poly (vinyl alcohol) PVA gel as the electrolyte was developed and is reported here. These flexible solid-state supercapacitors were fabricated without any binders, current collectors, or electroactive additives. Because of the porous structure of the CNF/RGO/CNT aerogel electrodes and the excellent electrolyte absorption properties of the CNFs present in the aerogel electrodes, the resulting flexible supercapacitors exhibited a high specific capacitance (i.e., 252 F g-1 at a discharge current density of 0.5 A g-1) and a remarkable cycle stability (i.e., more than 99.5% of the capacitance was retained after 1000 charge-discharge cycles at a current density of 1 A g-1). Furthermore, the supercapacitors also showed extremely high areal capacitance, areal power density, and energy density (i.e., 216 mF cm-2, 9.5 mW cm-2, and 28.4 µWh cm-2, respectively). In light of its excellent electrical performance, low cost, ease of large-scale manufacturing, and environmental friendliness, the CNF/RGO/CNT aerogel electrodes may have a promising application in the development of flexible-energy storage devices.
Keywords: aerogels, cellulose nanofibrils, graphene, carbon nanotube, all-solid-state supercapacitors
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Zheng, Qifeng; Cai, Zhiyong; Ma, Zhenqiang; Gong, Shaoqin. 2015. Cellulose nanofibril/reduced graphene oxide/carbon nanotube hybrid aerogels for highly flexible and all-solid-state supercapacitors. ACS Applied Materials and Interfaces. 7: 3263−3271.
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