Thermocells Driven by Phase Transition of Hydrogel Nanoparticles

Benshuai Guo, Yu Hoshino, Fan Gao, Keisuke Hayashi, Yoshiko Miura, Nobuo Kimizuka, Teppei Yamada

研究成果: ジャーナルへの寄稿学術誌査読

30 被引用数 (Scopus)

抄録

Thermoelectric conversion of low temperature, delocalized, and abundant thermal sources is crucial for the development of the Internet of Things (IoT) and/or a carbon-free society. Thermocells are of great interest in thermoelectric conversion of low-temperature heat due to the low cost and flexibility of components. However, significant improvement of the conversion efficiency is required for the practical use of the cells. Here, we report thermo-electrochemical cells driven by volume phase transition (VPT) of hydrogel nanoparticles (NPs). Entropically driven VPT of poly(N-isopropylacrylamide) NPs containing carboxylic acids and amines generates a pH gradient of up to 0.049 and -0.053 pH K-1, respectively, around physiological temperature. The pH gradient triggers the proton-coupled electron transfer (PCET) reactions of quinhydrone on the electrodes, resulting in the highly efficient thermoelectric conversion with a Seebeck coefficient (Se) of -6.7 and +6.1 mV K-1. Thermocells driven by phase transition of hydrogels provide a nontoxic, flexible, and inexpensive charger that harvests carbon-free energy from abundant energy sources such as solar, body and waste heat.

本文言語英語
ページ(範囲)17318-17322
ページ数5
ジャーナルJournal of the American Chemical Society
142
41
DOI
出版ステータス出版済み - 10月 14 2020

!!!All Science Journal Classification (ASJC) codes

  • 触媒
  • 化学 (全般)
  • 生化学
  • コロイド化学および表面化学

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