材料科学
韧性
塞贝克系数
可穿戴技术
可穿戴计算机
极限抗拉强度
光电子学
复合材料
计算机科学
嵌入式系统
热导率
作者
Huan Liu,Ding Zhang,Peijia Bai,Yin Mao,Qi Li,Jiaqi Guo,Yanjie Fang,Rujun Ma
标识
DOI:10.1002/adma.202300696
摘要
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, stretching-induced crystallization and the thermoelectric effect are combined 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. The use of SPTC-based systems in wearable devices for energy-autonomous strain sensors and health monitoring is demonstrated. This can facilitate the rapid implementation of sustainable wearable electronics in the Internet of Things era.
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