Open AccessMass Transport Behaviors in Graphene and Polyaniline Heterostructure–Based Microsupercapacitors
Author(s) -
Chen Cheng,
Huang Jiaqian,
Mishukova Viktoriia,
Jiang Kaiyue,
Ye Xuanzi,
Lu Chenbao,
Chen Zhenying,
Ke Changchun,
Su Yuezeng,
Li Jiantong,
Zhuang Xiaodong
Publication year - 2021
Publication title -
advanced energy and sustainability research
Language(s) - English
Resource type - Journals
ISSN - 2699-9412
DOI - 10.1002/aesr.202100006
Subject(s) - pseudocapacitance , materials science , graphene , capacitance , polyaniline , supercapacitor , nanotechnology , quartz crystal microbalance , fabrication , electrode , heterojunction , optoelectronics , chemical engineering , adsorption , composite material , polymer , medicine , chemistry , alternative medicine , organic chemistry , pathology , engineering , polymerization
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 SO 4 2− 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.