# Ionogel-based flexible electronics

## TL;DR

This review discusses recent advances in ionogels for flexible electronics, highlighting their properties and potential future developments.

## Contribution

The paper provides a comprehensive review of recent (past five years) ionogel research and applications in flexible electronics.

## Key findings

- Ionogels are highlighted for their non-volatility, thermal stability, and ionic conductivity in flexible electronics.
- Applications in sensors, energy harvesting, and smart devices are emphasized.
- Future directions include multifunctional integration and self-healing capabilities.

## Abstract

With the advent of the Internet of Things generation, functional electronics have rapidly emerged as a focus in materials science and electronic engineering. Ionogels have gained significant attention due to their unique physicochemical properties—such as non-volatility, excellent thermal and electrochemical stability, mechanical properties and ionic conductivity—making them crucial materials in flexible electronics. This work focuses on reviewing research progress in the design of ionogels with diverse functionalities and their applications in flexible electronics (primarily over the past five years), compared with previously published reviews. In this review, we comprehensively introduce the fundamental composition and structure of ionogels based on their structure-property-application relationships. Further discussion highlights innovative applications of ionogels in sensors, energy-harvesting devices, storage devices and smart devices, emphasizing their broad potential in flexible electronics. Finally, we propose future directions for ionogels, including multifunctional integration, long-term stability and self-healing capabilities, intended to provide guidance and insights for researchers in flexible electronics.

This review summarizes recent advances in the design and versatile applications of ionogels in flexible electronics, exploring their structure-property relationships and future research directions.