Recent progress in fibrous high-entropy energy harvesting devices for wearable applications

With the rapid development of Internet of Things and smart cities, flexible electronics are attracting enormous research interest in various applications. On the basis of soft and comfortable one-dimensional fibers, fibrous electronics with lightweight and highly integrated features are thus of great prospects to meet the demand of miniaturized wearable electronics for flectional human body. Especially, extensive efforts have been devoted to fibertronic research with sustainable power supply from high-entropy energy. This review discusses the recent progress and current challenges of fibrous high-entropy energy harvesting devices for wearable applications. The design of fibrous electronics including material choice, fiber fabrications and electrode configurations is first summarized. Then, the emerging applications of self-powered fibrous electronics based on mechanical, thermal and light energies are demonstrated, such as piezoelectric, triboelectric, thermoelectric, photoelectric and hybrid wearable sensors. With the advances highlighted here and the ongoing research efforts, the continuous breakthrough in fibrous high-entropy energy harvesting devices and their attractive applications is foreseeable in the future.