塞贝克系数
离子键合
材料科学
热电效应
热电材料
离子电导率
离子
电解质
化学工程
化学
复合材料
热力学
物理化学
有机化学
电极
物理
工程类
热导率
作者
Bin Chen,Qianling Chen,Songhua Xiao,Jiansong Feng,Xu Zhang,Taihong Wang
出处
期刊:Science Advances
[American Association for the Advancement of Science (AAAS)]
日期:2021-11-26
卷期号:7 (48)
被引量:79
标识
DOI:10.1126/sciadv.abi7233
摘要
The design of ultrasensitive ionic thermopiles is important for low-grade heat collection and temperature sensing. However, high-quality ionic thermoelectric materials with negative thermopower have been rarely reported to date. Effective adjustment of the interaction between the polymer network and the electrolyte anion/cation is an important method to achieve notable thermopower. Here, we demonstrate an ionic hydrogel thermoelectric material with giant negative thermopower obtained by synergistic coordination and hydration interactions. The ionic hydrogel, made of polyvinyl alcohol and sodium hydroxide, is prepared by simple dry-annealed process and exhibits a thermopower of up to −37.61 millivolts per kelvin, an extremely high absolute thermopower for electronic and ionic conductors. This ionic hydrogel is promising for the design of high-thermopower ionic thermoelectric materials and the low-grade heat energy harvesting.
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