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Giant thermopower of ionic gelatin near room temperature

by Zhu, Yongbin , Zhang, Wenqing , Chen, Gang , Han, Zhijia , Feng, Shien-Ping , Wang, Weichao , Li, Qikai , Qian, Xin , Han, Cheng-Gong , Liu, Weishu , Deng, Biao

in Energy conversion / Gelatin / Internet of Things / Ions / Redox reactions / Room temperature / Sodium chloride

2020

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Giant thermopower of ionic gelatin near room temperature

by Zhu, Yongbin , Zhang, Wenqing , Chen, Gang , Han, Zhijia , Feng, Shien-Ping , Wang, Weichao , Li, Qikai , Qian, Xin , Han, Cheng-Gong , Liu, Weishu , Deng, Biao

in Energy conversion / Gelatin / Internet of Things / Ions / Redox reactions / Room temperature / Sodium chloride

2020

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Giant thermopower of ionic gelatin near room temperature

by Zhu, Yongbin , Zhang, Wenqing , Chen, Gang , Han, Zhijia , Feng, Shien-Ping , Wang, Weichao , Li, Qikai , Qian, Xin , Han, Cheng-Gong , Liu, Weishu , Deng, Biao

in Energy conversion / Gelatin / Internet of Things / Ions / Redox reactions / Room temperature / Sodium chloride

2020

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Journal Article

Giant thermopower of ionic gelatin near room temperature

Zhu, Yongbin,

Zhang, Wenqing,

Chen, Gang,

Han, Zhijia,

Feng, Shien-Ping,

Wang, Weichao,

Li, Qikai,

Qian, Xin,

Han, Cheng-Gong,

Liu, Weishu,

Deng, Biao

2020

Overview

Harvesting heat from the environment into electricity has the potential to power Internet-of-things (IoT) sensors, freeing them from cables or batteries and thus making them especially useful for wearable devices. We demonstrate a giant positive thermopower of 17.0 millivolts per degree Kelvin in a flexible, quasi-solid-state, ionic thermoelectric material using synergistic thermodiffusion and thermogalvanic effects. The ionic thermoelectric material is a gelatin matrix modulated with ion providers (KCl, NaCl, and KNO₃) for thermodiffusion effect and a redox couple [Fe(CN)₆4−/Fe(CN)₆3−] for thermogalvanic effect. A proof-of-concept wearable device consisting of 25 unipolar elements generated more than 2 volts and a peak power of 5 microwatts using body heat. This ionic gelatin shows promise for environmental heat-to-electric energy conversion using ions as energy carriers.

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Publisher

American Association for the Advancement of Science,The American Association for the Advancement of Science

Subject

/ Gelatin

/ Ions