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Resistivity-Temperature Behavior of Intrinsically Conducting Bis(3-methoxysalicylideniminato)nickel Polymer

Materials with a positive temperature coefficient have many applications, including overcharge and over-temperature protection in lithium-ion (Li-ion) batteries. The thermoresistive properties of an electrically conductive polymer, based on a Ni(salen)-type backbone, known as polyNiMeOSalen, were ev...

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Autores principales: Beletskii, Evgenii, Ershov, Valentin, Danilov, Stepan, Lukyanov, Daniil, Alekseeva, Elena, Levin, Oleg
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2020
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7762270/
https://www.ncbi.nlm.nih.gov/pubmed/33291328
http://dx.doi.org/10.3390/polym12122925
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author Beletskii, Evgenii
Ershov, Valentin
Danilov, Stepan
Lukyanov, Daniil
Alekseeva, Elena
Levin, Oleg
author_facet Beletskii, Evgenii
Ershov, Valentin
Danilov, Stepan
Lukyanov, Daniil
Alekseeva, Elena
Levin, Oleg
author_sort Beletskii, Evgenii
collection PubMed
description Materials with a positive temperature coefficient have many applications, including overcharge and over-temperature protection in lithium-ion (Li-ion) batteries. The thermoresistive properties of an electrically conductive polymer, based on a Ni(salen)-type backbone, known as polyNiMeOSalen, were evaluated by means of in situ resistivity measurements. It was found that the polymer was conductive at temperatures below 220 °C; however, the polymer increased in resistivity by three orders of magnitude upon reaching 250 °C. Thermogravimetric results combined with elemental analyses revealed that the switch from the insulation stage to the conductive stage resulted from thermally dedoping the polymer. Electrochemical studies demonstrated that a polymer retains its electroactivity when it is heated and can be recovered to a conductive state through oxidation via electrochemical doping in an electrolyte solution.
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spelling pubmed-77622702020-12-26 Resistivity-Temperature Behavior of Intrinsically Conducting Bis(3-methoxysalicylideniminato)nickel Polymer Beletskii, Evgenii Ershov, Valentin Danilov, Stepan Lukyanov, Daniil Alekseeva, Elena Levin, Oleg Polymers (Basel) Article Materials with a positive temperature coefficient have many applications, including overcharge and over-temperature protection in lithium-ion (Li-ion) batteries. The thermoresistive properties of an electrically conductive polymer, based on a Ni(salen)-type backbone, known as polyNiMeOSalen, were evaluated by means of in situ resistivity measurements. It was found that the polymer was conductive at temperatures below 220 °C; however, the polymer increased in resistivity by three orders of magnitude upon reaching 250 °C. Thermogravimetric results combined with elemental analyses revealed that the switch from the insulation stage to the conductive stage resulted from thermally dedoping the polymer. Electrochemical studies demonstrated that a polymer retains its electroactivity when it is heated and can be recovered to a conductive state through oxidation via electrochemical doping in an electrolyte solution. MDPI 2020-12-06 /pmc/articles/PMC7762270/ /pubmed/33291328 http://dx.doi.org/10.3390/polym12122925 Text en © 2020 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/).
spellingShingle Article
Beletskii, Evgenii
Ershov, Valentin
Danilov, Stepan
Lukyanov, Daniil
Alekseeva, Elena
Levin, Oleg
Resistivity-Temperature Behavior of Intrinsically Conducting Bis(3-methoxysalicylideniminato)nickel Polymer
title Resistivity-Temperature Behavior of Intrinsically Conducting Bis(3-methoxysalicylideniminato)nickel Polymer
title_full Resistivity-Temperature Behavior of Intrinsically Conducting Bis(3-methoxysalicylideniminato)nickel Polymer
title_fullStr Resistivity-Temperature Behavior of Intrinsically Conducting Bis(3-methoxysalicylideniminato)nickel Polymer
title_full_unstemmed Resistivity-Temperature Behavior of Intrinsically Conducting Bis(3-methoxysalicylideniminato)nickel Polymer
title_short Resistivity-Temperature Behavior of Intrinsically Conducting Bis(3-methoxysalicylideniminato)nickel Polymer
title_sort resistivity-temperature behavior of intrinsically conducting bis(3-methoxysalicylideniminato)nickel polymer
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7762270/
https://www.ncbi.nlm.nih.gov/pubmed/33291328
http://dx.doi.org/10.3390/polym12122925
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