Mass Transport Behaviors in Graphene and Polyaniline Heterostructure–Based Microsupercapacitors

Mass Transport Behaviors in Graphene and Polyaniline Heterostructure–Based Microsupercapacitors

The development of miniaturized energy storage components with high areal performance for emerging electronics depends on scalable fabrication techniques for thick electrodes and an in‐depth understanding of the intrinsic properties of materials. Based on the coprecipitation behavior of electrically...

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Bibliographic Details
Published in:Advanced energy and sustainability research Vol. 2; no. 5
Main Authors: Chen, Cheng, Huang, Jiaqian, Mishukova, Viktoriia, Jiang, Kaiyue, Ye, Xuanzi, Lu, Chenbao, Chen, Zhenying, Ke, Changchun, Su, Yuezeng, Li, Jiantong, Zhuang, Xiaodong
Format: Journal Article
Language:English
Published: Argonne John Wiley & Sons, Inc 01-05-2021
Wiley-VCH
Subjects:
Anions
Capacitance
Carbon
Composite materials
Direct laser writing
Electrochemistry
Electrodes
Electrolytes
Energy
Energy storage
Fabrication
Fourier transforms
Glass substrates
Graphene
Heterostructures
laser scribing
Mass transport
Material properties
microsupercapacitors
Polyanilines
Polyethylene terephthalate
Polyvinyl alcohol
Protonation
Quartz crystal microbalance
Quartz crystals
Scanning electron microscopy
Sensors
Spectrum analysis
Substrates
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Summary:The development of miniaturized energy storage components with high areal performance for emerging electronics depends on scalable fabrication techniques for thick electrodes and an in‐depth understanding of the intrinsic properties of materials. Based on the coprecipitation behavior of electrically exfoliated graphene and reduced graphene oxide–templated polyaniline (PANi) nanoflake, this work develops a simple, green, low‐cost, and scalable drop‐casted technique to easily fabricate uniform thick electrodes (up to 80 μm) on various substrates. Through using a direct laser writing process, planar microsupercapacitors can be readily attained. As‐fabricated flexible all‐solid‐state microsupercapacitors exhibit an ultrahigh areal capacitance of 172 mF cm−2 at 0.1 A cm−2 and excellent cycling stability of 91% capacitance retention over 2000 cycles at a high current density of 1.0 A cm−2. Furthermore, based on the electrochemical quartz crystal microbalance research result, the pseudocapacitance contribution is mostly provided by the adsorption/desorption of SO42− anions during the protonation process of PANi. This work offers a simple strategy toward superior‐performance micro‐sized energy devices and a new perspective to understand the origin of the capacitance of composites and heterostructures. Graphene and polyaniline heterostructure based on‐chip microsupercapacitor is prepared by direct dip coating and laser scribing. As‐prepared microsupercapacitors exhibit ultra‐high areal capacitance of up to 172 mF cm−2. The mass transport behaviors among the heterostructure are studied to address the high performance and offers a new way to understand the charge‐storage mechanism of heterostructure‐based electrodes.
ISSN:2699-9412
2699-9412
DOI:10.1002/aesr.202100006