Conducting Polymer/Hydrogel Hybrid Free-Standing Electrodes for Flexible Supercapacitors Capable of Self-Sensing Working Conditions: Large-Scale Fabrication Through Facile and Low-Cost Route
Madari Palliyalil Sidheekha, Aranhikundan Shabeeba, Lijin Rajan, Mohamed Shahin Thayyil and Yahya A. Ismail
Madari Palliyalil Sidheekha1
Aranhikundan Shabeeba1
Lijin Rajan1
Mohamed Shahin Thayyil2
Yahya A. Ismail1,Email
1Advanced Materials Research Center, Department of Chemistry, University of Calicut, Thenhipalam, Kerala, 673635, India
2Department of Physics, University of Calicut, Thenhipalam, Kerala, 673635, India
Abstract
Search for energy storage devices towards sustainability, compatibility and versatility demands flexible supercapacitors capable of sensing their surrounding conditions. Here, highly electroactive polyaniline/chitosan-hydrogel hybrid films were fabricated to develop a self-sensing motor. The hybrid electrodes showed remarkable supercapacitive properties with high-rate performance while capable of sensing electrical, thermal and chemical working conditions as evinced from the chronopotentiometric responses with consumed electrical energy as the sensing parameter. A single faradaic electrochemical reaction (the reversible oxidation-reduction) is responsible for both the sensing and charge storage properties of the hybrid film, which is exploited to develop a truly integrated sensing supercapacitor without additional connectivities. As a proof-of-concept, an all-solid-state symmetric supercapacitor was fabricated which showed large capacitance (111 mF cm-2 at 0.4 mA cm-2), high energy density (13.8 µWh cm-2 at a power density of 100 µW cm-2) as well as 74% capacitance retention after 5000 charge-discharge cycles. Besides, the current sensing characteristics of the device were tested from charge-discharge responses at a constant charged state to prove the above concept. This fundamental study provides a new direction for the development of simple and compatible self-sensing motors.
Publication details
Received: 12 Jan 2023
Revised: 10 May 2023
Accepted: 13 May 2023
Published online: 14 May 2023
Article type:
Research Paper
DOI:
10.30919/es890
Volume:
23
Article :
890
Citation:
Engineered Science, 2023, 23, 890
Permissions:
Copyright
Number of downloads:
4247
Citation Information:
28
Description:
Nanostructured Chitosan/polyaniline hydrogel films with nano/micro channels show high electrochemica....
Nanostructured Chitosan/polyaniline hydrogel films with nano/micro channels show high electrochemical performance and are used for developing self-sensing supercapacitors.
Supplementary Information:
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