塞贝克系数
热电堆
热电效应
双极扩散
材料科学
离子键合
热电材料
聚合物
光电子学
化学物理
离子
复合材料
化学
热导率
热力学
光学
有机化学
等离子体
物理
红外线的
量子力学
作者
Dan Zhao,Anna Martinelli,Andreas Willfahrt,Thomas Fischer,Diana Bernin,Zia Ullah Khan,Maryam Shahi,J. W. Brill,Magnus P. Jonsson,Simone Fabiano,Xavier Crispin
标识
DOI:10.1038/s41467-019-08930-7
摘要
Measuring temperature and heat flux is important for regulating any physical, chemical, and biological processes. Traditional thermopiles can provide accurate and stable temperature reading but they are based on brittle inorganic materials with low Seebeck coefficient, and are difficult to manufacture over large areas. Recently, polymer electrolytes have been proposed for thermoelectric applications because of their giant ionic Seebeck coefficient, high flexibility and ease of manufacturing. However, the materials reported to date have positive Seebeck coefficients, hampering the design of ultra-sensitive ionic thermopiles. Here we report an "ambipolar" ionic polymer gel with giant negative ionic Seebeck coefficient. The latter can be tuned from negative to positive by adjusting the gel composition. We show that the ion-polymer matrix interaction is crucial to control the sign and magnitude of the ionic Seebeck coefficient. The ambipolar gel can be easily screen printed, enabling large-area device manufacturing at low cost.
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