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Flexible Supercapacitor Based on Inkjet‐Printed Graphene@Polyaniline Nanocomposites with Ultrahigh Capacitance
Author(s) -
Diao Jianglin,
Yuan Jia,
Ding Ailing,
Zheng Jiushang,
Lu Zhisong
Publication year - 2018
Publication title -
macromolecular materials and engineering
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.913
H-Index - 96
eISSN - 1439-2054
pISSN - 1438-7492
DOI - 10.1002/mame.201800092
Subject(s) - materials science , supercapacitor , graphene , polyaniline , capacitance , nanocomposite , oxide , fabrication , nanotechnology , composite number , nanoparticle , electrode , composite material , polymer , medicine , chemistry , alternative medicine , pathology , polymerization , metallurgy
This work describes the fabrication of high‐performance all‐solid‐state supercapacitors based on covalently‐anchored reduced graphene oxide (RGO)@polyaniline (PANI) composites via an inkjet printing method. Morphological and chemical characterization data show that PANI nanoparticles are immobilized on graphene oxide (GO) nanosheets via covalent bonds. Sandwich‐structured and interdigitated supercapacitors are fabricated by printing the as‐prepared GO@PANI composites on flexible substrates, followed by a chemical reduction. The devices display high volumetric capacitances (258.5 F cm −3 at 1 mV s −1 for sandwich‐structured ones and 554 F cm −3 at 1 mV s −1 for interdigitated ones) and excellent cycling retention (2000 cycles >90%). Moreover, at the bending state, there are no significant changes on the device capacitances, indicating their great flexibility. The high‐performance devices can be further designed to produce special geometries and patterns. The work may provide a novel strategy to fabricate RGO@PANI composite‐based supercapacitors, which allows the end users to precisely deposit active materials according to their designs, for miniature and wearable electronics.