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Elaborating the Iodine/Polyiodide Equilibrium Effects in Nanoporous Carbon‐based Battery Electrode via Extreme Mass Asymmetry in Hybrid Cells
This article discusses the conversion of electrodeposited iodine to polyiodides within the nanopores of carbon electrodes that affect the performance of iodide electrolyte‐based electrochemical cells. Here, carbon electrodes have been polarized in aqueous sodium iodide electrolyte to store charge in...
Autores principales: | , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
John Wiley and Sons Inc.
2021
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8457216/ https://www.ncbi.nlm.nih.gov/pubmed/34595089 http://dx.doi.org/10.1002/celc.202100458 |
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author | Schranger, H. Khosravi, S. Fitzek, H. Abbas, Q. |
author_facet | Schranger, H. Khosravi, S. Fitzek, H. Abbas, Q. |
author_sort | Schranger, H. |
collection | PubMed |
description | This article discusses the conversion of electrodeposited iodine to polyiodides within the nanopores of carbon electrodes that affect the performance of iodide electrolyte‐based electrochemical cells. Here, carbon electrodes have been polarized in aqueous sodium iodide electrolyte to store charge in the form of solid iodine via highly reversible reaction (2I(−)⇌I(2)+2e(−)). The stored iodine within the pores interacts with free iodide ions present in the bulk electrolyte via comproportionation reactions leading to polyiodide (I(3) (−) and I(5) (−)) formations. By tuning the mass asymmetry of carbon electrodes in hybrid cells and using the in‐situ Raman spectroscopy on positive battery electrode, we show the influence of iodine/polyiodides equilibrium shifts on the self‐discharge and voltage rebounds during open circuit conditions. This study provides insights into the charging mechanisms of carbon electrodes for iodine‐based hybrid supercapacitors and battery systems. |
format | Online Article Text |
id | pubmed-8457216 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2021 |
publisher | John Wiley and Sons Inc. |
record_format | MEDLINE/PubMed |
spelling | pubmed-84572162021-09-28 Elaborating the Iodine/Polyiodide Equilibrium Effects in Nanoporous Carbon‐based Battery Electrode via Extreme Mass Asymmetry in Hybrid Cells Schranger, H. Khosravi, S. Fitzek, H. Abbas, Q. ChemElectroChem Articles This article discusses the conversion of electrodeposited iodine to polyiodides within the nanopores of carbon electrodes that affect the performance of iodide electrolyte‐based electrochemical cells. Here, carbon electrodes have been polarized in aqueous sodium iodide electrolyte to store charge in the form of solid iodine via highly reversible reaction (2I(−)⇌I(2)+2e(−)). The stored iodine within the pores interacts with free iodide ions present in the bulk electrolyte via comproportionation reactions leading to polyiodide (I(3) (−) and I(5) (−)) formations. By tuning the mass asymmetry of carbon electrodes in hybrid cells and using the in‐situ Raman spectroscopy on positive battery electrode, we show the influence of iodine/polyiodides equilibrium shifts on the self‐discharge and voltage rebounds during open circuit conditions. This study provides insights into the charging mechanisms of carbon electrodes for iodine‐based hybrid supercapacitors and battery systems. John Wiley and Sons Inc. 2021-08-18 2021-08-13 /pmc/articles/PMC8457216/ /pubmed/34595089 http://dx.doi.org/10.1002/celc.202100458 Text en © 2021 The Authors. ChemElectroChem published by Wiley-VCH GmbH https://creativecommons.org/licenses/by/4.0/This is an open access article under the terms of the http://creativecommons.org/licenses/by/4.0/ (https://creativecommons.org/licenses/by/4.0/) License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited. |
spellingShingle | Articles Schranger, H. Khosravi, S. Fitzek, H. Abbas, Q. Elaborating the Iodine/Polyiodide Equilibrium Effects in Nanoporous Carbon‐based Battery Electrode via Extreme Mass Asymmetry in Hybrid Cells |
title | Elaborating the Iodine/Polyiodide Equilibrium Effects in Nanoporous Carbon‐based Battery Electrode via Extreme Mass Asymmetry in Hybrid Cells |
title_full | Elaborating the Iodine/Polyiodide Equilibrium Effects in Nanoporous Carbon‐based Battery Electrode via Extreme Mass Asymmetry in Hybrid Cells |
title_fullStr | Elaborating the Iodine/Polyiodide Equilibrium Effects in Nanoporous Carbon‐based Battery Electrode via Extreme Mass Asymmetry in Hybrid Cells |
title_full_unstemmed | Elaborating the Iodine/Polyiodide Equilibrium Effects in Nanoporous Carbon‐based Battery Electrode via Extreme Mass Asymmetry in Hybrid Cells |
title_short | Elaborating the Iodine/Polyiodide Equilibrium Effects in Nanoporous Carbon‐based Battery Electrode via Extreme Mass Asymmetry in Hybrid Cells |
title_sort | elaborating the iodine/polyiodide equilibrium effects in nanoporous carbon‐based battery electrode via extreme mass asymmetry in hybrid cells |
topic | Articles |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8457216/ https://www.ncbi.nlm.nih.gov/pubmed/34595089 http://dx.doi.org/10.1002/celc.202100458 |
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