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Polymer Gel with Tunable Conductive Properties: A Material for Thermal Energy Harvesting

[Image: see text] The spontaneous gelation of poly(4-vinyl pyridine)/pyridine solution produces materials with conductive properties that are suitable for various energy conversion technologies. The gel is a thermoelectric material with a conductivity of 2.2–5.0 × 10(–6) S m(–1) and dielectric const...

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Autores principales: Vaganova, Evgenia, Eliaz, Dror, Leitus, Gregory, Solomonov, Aleksei, Dubnikova, Faina, Feldman, Yishay, Rosenhek-Goldian, Irit, Cohen, Sidney R., Shimanovich, Ulyana
Formato: Online Artículo Texto
Lenguaje:English
Publicado: American Chemical Society 2022
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9798393/
https://www.ncbi.nlm.nih.gov/pubmed/36591209
http://dx.doi.org/10.1021/acsomega.2c05301
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author Vaganova, Evgenia
Eliaz, Dror
Leitus, Gregory
Solomonov, Aleksei
Dubnikova, Faina
Feldman, Yishay
Rosenhek-Goldian, Irit
Cohen, Sidney R.
Shimanovich, Ulyana
author_facet Vaganova, Evgenia
Eliaz, Dror
Leitus, Gregory
Solomonov, Aleksei
Dubnikova, Faina
Feldman, Yishay
Rosenhek-Goldian, Irit
Cohen, Sidney R.
Shimanovich, Ulyana
author_sort Vaganova, Evgenia
collection PubMed
description [Image: see text] The spontaneous gelation of poly(4-vinyl pyridine)/pyridine solution produces materials with conductive properties that are suitable for various energy conversion technologies. The gel is a thermoelectric material with a conductivity of 2.2–5.0 × 10(–6) S m(–1) and dielectric constant ε = 11.3. On the molecular scale, the gel contains various types of hydrogen bonding, which are formed via self-protonation of the pyridine side chains. Our measurements and calculations revealed that the gelation process produces bias-dependent polymer complexes: quasi-symmetric, strongly hydrogen-bonded species, and weakly bound protonated structures. Under an applied DC bias, the gelled complexes differ in their capacitance/conductive characteristics. In this work, we exploited the bias-responsive characteristics of poly(4-vinyl pyridine) gelled complexes to develop a prototype of a thermal energy harvesting device. The measured device efficiency is S = ΔV/ΔT = 0.18 mV/K within the temperature range of 296–360 K. Investigation of the mechanism underlying the conversion of thermal energy into electric charge showed that the heat-controlled proton diffusion (the Soret effect) produces thermogalvanic redox reactions of hydrogen ions on the anode. The charge can be stored in an external capacitor for heat energy harvesting. These results advance our understanding of the molecular mechanisms underlying thermal energy conversion in the poly(4-vinyl pyridine)/pyridine gel. A device prototype, enabling thermal energy harvesting, successfully demonstrates a simple path toward the development of inexpensive, low-energy thermoelectric generators.
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spelling pubmed-97983932022-12-30 Polymer Gel with Tunable Conductive Properties: A Material for Thermal Energy Harvesting Vaganova, Evgenia Eliaz, Dror Leitus, Gregory Solomonov, Aleksei Dubnikova, Faina Feldman, Yishay Rosenhek-Goldian, Irit Cohen, Sidney R. Shimanovich, Ulyana ACS Omega [Image: see text] The spontaneous gelation of poly(4-vinyl pyridine)/pyridine solution produces materials with conductive properties that are suitable for various energy conversion technologies. The gel is a thermoelectric material with a conductivity of 2.2–5.0 × 10(–6) S m(–1) and dielectric constant ε = 11.3. On the molecular scale, the gel contains various types of hydrogen bonding, which are formed via self-protonation of the pyridine side chains. Our measurements and calculations revealed that the gelation process produces bias-dependent polymer complexes: quasi-symmetric, strongly hydrogen-bonded species, and weakly bound protonated structures. Under an applied DC bias, the gelled complexes differ in their capacitance/conductive characteristics. In this work, we exploited the bias-responsive characteristics of poly(4-vinyl pyridine) gelled complexes to develop a prototype of a thermal energy harvesting device. The measured device efficiency is S = ΔV/ΔT = 0.18 mV/K within the temperature range of 296–360 K. Investigation of the mechanism underlying the conversion of thermal energy into electric charge showed that the heat-controlled proton diffusion (the Soret effect) produces thermogalvanic redox reactions of hydrogen ions on the anode. The charge can be stored in an external capacitor for heat energy harvesting. These results advance our understanding of the molecular mechanisms underlying thermal energy conversion in the poly(4-vinyl pyridine)/pyridine gel. A device prototype, enabling thermal energy harvesting, successfully demonstrates a simple path toward the development of inexpensive, low-energy thermoelectric generators. American Chemical Society 2022-12-13 /pmc/articles/PMC9798393/ /pubmed/36591209 http://dx.doi.org/10.1021/acsomega.2c05301 Text en © 2022 The Authors. Published by American Chemical Society https://creativecommons.org/licenses/by/4.0/Permits the broadest form of re-use including for commercial purposes, provided that author attribution and integrity are maintained (https://creativecommons.org/licenses/by/4.0/).
spellingShingle Vaganova, Evgenia
Eliaz, Dror
Leitus, Gregory
Solomonov, Aleksei
Dubnikova, Faina
Feldman, Yishay
Rosenhek-Goldian, Irit
Cohen, Sidney R.
Shimanovich, Ulyana
Polymer Gel with Tunable Conductive Properties: A Material for Thermal Energy Harvesting
title Polymer Gel with Tunable Conductive Properties: A Material for Thermal Energy Harvesting
title_full Polymer Gel with Tunable Conductive Properties: A Material for Thermal Energy Harvesting
title_fullStr Polymer Gel with Tunable Conductive Properties: A Material for Thermal Energy Harvesting
title_full_unstemmed Polymer Gel with Tunable Conductive Properties: A Material for Thermal Energy Harvesting
title_short Polymer Gel with Tunable Conductive Properties: A Material for Thermal Energy Harvesting
title_sort polymer gel with tunable conductive properties: a material for thermal energy harvesting
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9798393/
https://www.ncbi.nlm.nih.gov/pubmed/36591209
http://dx.doi.org/10.1021/acsomega.2c05301
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