A Guide for Cross-Linking Modulation: The Record Rectifying Ratio of Hydrogel-Based Ultra Flexible Ionic Diodes
Advanced Materials Interfaces, vol.11, no.2, 2024 (SCI-Expanded, Scopus)
- Publication Type: Article / Article
- Volume: 11 Issue: 2
- Publication Date: 2024
- Doi Number: 10.1002/admi.202300678
- Journal Name: Advanced Materials Interfaces
- Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus, Applied Science & Technology Source, Compendex, INSPEC
- Keywords: bending tolerance, flexible iontronics, hydrogel based ionic diode, hydrogels, rectification ratio
- Yozgat Bozok University Affiliated: Yes
Abstract
This study focuses on the effect of cross-linking mechanisms in the development of hydrogel-based flexible ionic diodes (HBIDs) with desirable features for ionic devices. The research explores one p-type hydrogel and a series of n-type hydrogels with varying cross-linking ratios, investigating their ion-conducting properties, morphological and electronic structures, as well as the performance of flexible HBIDs constructed using these hydrogels. The results indicate that the cross-linking ratio significantly influences ionic conductivity, bulk resistance, and capacitance. Additionally, the HBIDs' ability to maintain their electrical performance under repeated mechanical bending is studied concerning the cross-linking ratio. Notably, the HBID with the highest cross-linking ratio (HG/12) exhibits relatively higher current densities (up to 8.9 mA cm−2) and considerably higher rectification ratios (up to 1269). Even after 500 cycles of deformation, the HG/12 diode maintained a rectification ratio of 987, demonstrating its excellent performance and durability.