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Nanocellulose Supported Hierarchical Structured Polyaniline/nanocarbon Nanocomposite Electrode Layer-by-layer Assembly for Green Flexible Supercapacitors

Overview
Journal RSC Adv
Specialty Chemistry
Date 2022 May 6
PMID 35520593
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Abstract

The development of a hierarchical structured multicomponent nanocomposite electrode is a promising strategy for utilizing the high efficiency of an electroactive material and improving the electrochemical performance. We propose cellulose nanofibril (CNF) aerogels with a nanoscale fiber-entangled network as the skeleton ( layer-by-layer (LbL) assembly) of electroactive materials polyaniline (PANi), carboxylic multiwalled carbon nanotubes (CMWCNTs), and graphene oxide (GO) to obtain structurally ordered polymer-inorganic hybrid nanocomposite electrodes for high-capacity flexible supercapacitors. The uniformly distributed multilayer nanoarchitecture, interconnected network, and hydrophilicity of the electrode provide a high specific surface area, excellent ion diffusion channels, and large effective contact area, thereby improving the electrochemical performance of the supercapacitor electrode. The specific capacitance of the CNF-[PANi/CMWCNT] (CPC) and CNF-[PANi/RGO] (CPR) electrodes reaches 965.80 and 780.64 F g in 1 M aqueous HSO electrolyte, respectively; the corresponding values in PVA/HPO electrolyte are 1.59 and 1.46 F cm. In addition, the assembled symmetric supercapacitors show good energy densities of 147.23 and 112.32 mW h cm, as well as excellent durability and flexibility. Our approach offers a simple and effective method for fabricating an ideal well-structured nanocomposite electrode for green and flexible energy storage devices LbL assembly.

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