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Performance boost for primary magnesium cells using iron complexing agents as electrolyte additives

Aqueous Mg battery technology holds significant appeal, owing to the availability of raw materials, high power densities and the possibility of fast mechanical recharge. However, Mg batteries have so far been prone to decreased capacity due to self-corrosion of the anodes from the electrochemical re...

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Autores principales: Höche, Daniel, Lamaka, Sviatlana V., Vaghefinazari, Bahram, Braun, Tobias, Petrauskas, Rokas P., Fichtner, Maximilian, Zheludkevich, Mikhail L.
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Nature Publishing Group UK 2018
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5953936/
https://www.ncbi.nlm.nih.gov/pubmed/29765088
http://dx.doi.org/10.1038/s41598-018-25789-8
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author Höche, Daniel
Lamaka, Sviatlana V.
Vaghefinazari, Bahram
Braun, Tobias
Petrauskas, Rokas P.
Fichtner, Maximilian
Zheludkevich, Mikhail L.
author_facet Höche, Daniel
Lamaka, Sviatlana V.
Vaghefinazari, Bahram
Braun, Tobias
Petrauskas, Rokas P.
Fichtner, Maximilian
Zheludkevich, Mikhail L.
author_sort Höche, Daniel
collection PubMed
description Aqueous Mg battery technology holds significant appeal, owing to the availability of raw materials, high power densities and the possibility of fast mechanical recharge. However, Mg batteries have so far been prone to decreased capacity due to self-corrosion of the anodes from the electrochemical redeposition of impurities, such as Fe, which results in parasitic cathodically active sites on the discharging anode. This work demonstrates that by adding Fe(3+)-complexing agents like Tiron or salicylate to the aqueous electrolyte of an Mg battery, it was possible to prevent the redeposition of Fe impurities and subsequent self-corrosion of the anode surface, thereby boosting battery performance. To prevent detrimental fouling of anode surface by Mg(OH)(2), employed Fe(3+)-complexing agents must also form soluble complexes with Mg(2+) of moderate stability. The interplay of these requirements predetermines the improvement of operating voltage and utilization efficiency.
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spelling pubmed-59539362018-05-21 Performance boost for primary magnesium cells using iron complexing agents as electrolyte additives Höche, Daniel Lamaka, Sviatlana V. Vaghefinazari, Bahram Braun, Tobias Petrauskas, Rokas P. Fichtner, Maximilian Zheludkevich, Mikhail L. Sci Rep Article Aqueous Mg battery technology holds significant appeal, owing to the availability of raw materials, high power densities and the possibility of fast mechanical recharge. However, Mg batteries have so far been prone to decreased capacity due to self-corrosion of the anodes from the electrochemical redeposition of impurities, such as Fe, which results in parasitic cathodically active sites on the discharging anode. This work demonstrates that by adding Fe(3+)-complexing agents like Tiron or salicylate to the aqueous electrolyte of an Mg battery, it was possible to prevent the redeposition of Fe impurities and subsequent self-corrosion of the anode surface, thereby boosting battery performance. To prevent detrimental fouling of anode surface by Mg(OH)(2), employed Fe(3+)-complexing agents must also form soluble complexes with Mg(2+) of moderate stability. The interplay of these requirements predetermines the improvement of operating voltage and utilization efficiency. Nature Publishing Group UK 2018-05-15 /pmc/articles/PMC5953936/ /pubmed/29765088 http://dx.doi.org/10.1038/s41598-018-25789-8 Text en © The Author(s) 2018 Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/.
spellingShingle Article
Höche, Daniel
Lamaka, Sviatlana V.
Vaghefinazari, Bahram
Braun, Tobias
Petrauskas, Rokas P.
Fichtner, Maximilian
Zheludkevich, Mikhail L.
Performance boost for primary magnesium cells using iron complexing agents as electrolyte additives
title Performance boost for primary magnesium cells using iron complexing agents as electrolyte additives
title_full Performance boost for primary magnesium cells using iron complexing agents as electrolyte additives
title_fullStr Performance boost for primary magnesium cells using iron complexing agents as electrolyte additives
title_full_unstemmed Performance boost for primary magnesium cells using iron complexing agents as electrolyte additives
title_short Performance boost for primary magnesium cells using iron complexing agents as electrolyte additives
title_sort performance boost for primary magnesium cells using iron complexing agents as electrolyte additives
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5953936/
https://www.ncbi.nlm.nih.gov/pubmed/29765088
http://dx.doi.org/10.1038/s41598-018-25789-8
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