论文题目：Strong Tough Thermogalvanic Hydrogel Thermocell With Extraordinarily High Thermoelectric Performance
论文作者：Lili Liu#, Ding Zhang#, Peijia Bai, Yin Mao, Qi Li, Jiaqi Guo, Yanjie Fang, Rujun Ma*
发表期刊：Advanced Materials, 2023, 2300296
Abstract
Thermocells can continuously convert heat into electricity, and they are widely used to power wearable electronic devices. However, they have a risk of leakage and poor mechanical properties. Although quasi-solid ionic thermocells can overcome the issue of electrolyte leakage, the trade-off between their excellent mechanical properties and high thermopower remains a major challenge. In this study, we combine stretching-induced crystallization and the thermoelectric effect to propose a high-strength quasi-solid stretchable polyvinyl alcohol thermogalvanic thermocell (SPTC) with a large tensile strength of 19 MPa and high thermopower of 6.5 mV K−1. The SPTC exhibits a high stretchability of 1300%, ultrahigh toughness of 163.4 MJ m−3, and high specific output power density of 1969 μW m−2 K−2. These comprehensive properties are superior to those of previously reported quasi-solid stretchable thermogalvanic thermocells. We demonstrate the use of SPTC-based systems in wearable devices for energy-autonomous strain sensors and health monitoring. This can facilitate the rapid implementation of sustainable wearable electronics in the Internet of Things era.