Flexible wearable ionogels: Classification, fabrication, properties and applications

Ionogels have emerged as distinctive materials of significant importance in the realm of flexible electronics. Their robust mechanical properties enable seamless integration with the contours of the human body, while environmental stability ensures longevity and reliability even in challenging operating conditions. The versatility of ionogels further extends to their tunable properties, enabling customization for specific applications and opening a vast design space to meet diverse electronic device requirements. These attributes position ionogels as key players in advancing wearable sensors, health monitoring devices, and various flexible electronic components. This article provides an overview of the research progress in the realm of ionogels for flexible wearable sensors, starting with their classification and preparation strategies. It delves into specific properties such as mechanical strength, adhesion, self-healing, electrical conductivity, and anti-freezing capabilities. Additionally, the application of functionalized ionogels in flexible wearables is explored. In conclusion, the paper summarizes the challenges faced and outlines future prospects for ionogels in the field of flexible electronics. As research in this area continues to advance, ionogels are poised to play a pivotal role in shaping the next generation of electronic technologies.