Self-healing, flexible and smart 3D hydrogel electrolytes based on alginate/PEDOT:PSS for supercapacitor applications

Badawi, Nujud M. M. and Bhatia, Mamta and Ramesh, Subramaniam and Ramesh, Kasi and Kuniyil, Mufsir and Shaik, Mohammed Rafi and Khan, Mujeeb and Shaik, Baji and Adil, Syed E. F. (2023) Self-healing, flexible and smart 3D hydrogel electrolytes based on alginate/PEDOT:PSS for supercapacitor applications. Polymers, 15 (3). ISSN 2073-4360, DOI

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Hydrogel electrolytes for energy storage devices have made great progress, yet they present a major challenge in the assembly of flexible supercapacitors with high ionic conductivity and self-healing properties. Herein, a smart self-healing hydrogel electrolyte based on alginate/poly (3,4-ethylenedioxythiophene):poly(styrenesulfonate) (alginate/PEDOT:PSS)(A/P:P) was prepared, wherein H2SO4 was employed as a polymeric initiator, as well as a source of ions. PEDOT:PSS is a semi-interpenetrating network (IPN) that has been used in recent studies to exhibit quick self-healing properties with the H2SO3 additive, which further improves its mechanical strength and self-healing performance. A moderate amount of PEDOT:PSS in the hydrogel (5 mL) was found to significantly improve the ionic conductivity compared to the pure hydrogel of alginate. Interestingly, the alginate/PEDOT:PSS composite hydrogel exhibited an excellent ability to self-heal and repair its original composition within 10 min of cutting. Furthermore, the graphite conductive substrate-based supercapacitor with the alginate/PEDOT:PSS hydrogel electrolyte provided a high specific capacitance of 356 F g(-1) at 100 mV/s g(-1). The results demonstrate that the A/P:P ratio with 5 mL PEDOT:PSS had a base sheet resistance of 0.9 Omega/square. This work provides a new strategy for designing flexible self-healing hydrogels for application in smart wearable electronics.

Item Type: Article
Funders: King Saud University (Grant No: RSPD2023R665)
Uncontrolled Keywords: Flexible; Self healing; Smart hydrogel; Electrolyte; Supercapacitor
Subjects: Q Science > QC Physics
T Technology > TK Electrical engineering. Electronics Nuclear engineering
Divisions: Faculty of Science > Department of Physics
Depositing User: Ms Zaharah Ramly
Date Deposited: 01 Dec 2023 06:02
Last Modified: 01 Dec 2023 06:09

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