Influence of Organic Additives for Zinc-Air Batteries on Cathode Stability and Performance
In this work, a theoretically predicted electrolyte composition comprising 6 M potassium hydroxide (KOH), 2 M citric acid, 1 M glycine, and 0.5 M zinc oxide is tested in terms of electrochemical performance, cathode stability, and electrolyte stability. It is shown that dissolved metal ions from the...
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Electrochemical Society, Inc.
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ftdlr:oai:elib.dlr.de:142334 2023-05-15T15:52:42+02:00 Influence of Organic Additives for Zinc-Air Batteries on Cathode Stability and Performance Kube, Alexander Wagner, Norbert Friedrich, K. Andreas 2021-05-19 application/pdf https://elib.dlr.de/142334/ https://elib.dlr.de/142334/1/Kube_2021_J._Electrochem._Soc._168_050531.pdf https://iopscience.iop.org/article/10.1149/1945-7111/abff63 en eng Electrochemical Society, Inc. https://elib.dlr.de/142334/1/Kube_2021_J._Electrochem._Soc._168_050531.pdf Kube, Alexander und Wagner, Norbert und Friedrich, K. Andreas (2021) Influence of Organic Additives for Zinc-Air Batteries on Cathode Stability and Performance. Journal of The Electrochemical Society, 168 (050531). Electrochemical Society, Inc. doi:10.1149/1945-7111/abff63 <https://doi.org/10.1149/1945-7111/abff63>. ISSN 0013-4651. info:eu-repo/semantics/closedAccess Elektrochemische Energietechnik Zeitschriftenbeitrag PeerReviewed info:eu-repo/semantics/article 2021 ftdlr https://doi.org/10.1149/1945-7111/abff63 2022-05-29T23:12:50Z In this work, a theoretically predicted electrolyte composition comprising 6 M potassium hydroxide (KOH), 2 M citric acid, 1 M glycine, and 0.5 M zinc oxide is tested in terms of electrochemical performance, cathode stability, and electrolyte stability. It is shown that dissolved metal ions from the cathode reacted with the introduced organic additives, reduced the cathode stability, and blocked metal oxidation reactions. This was due to a Kolbe-like decomposition reaction that occurred because of the presence of potassium citrate, which formed because of the reaction of KOH and citric acid. Furthermore, intermediate products of this decomposition reaction appeared to block the cathode's surface, hindering oxygen (O2) evolution and reducing the overall cell performance. The decomposition of potassium citrate starts above 1.7 V Zn. Additionally, it is shown that tribase citric acid behaves similarly to a dibase carbonic acid. Both decrease the onset potential for the O2 reduction reaction from 0.9 V vs reversible hydrogen electrode (RHE) for pure 6 M KOH to 0.6 V vs RHE for KOH with these organic acids. Article in Journal/Newspaper Carbonic acid German Aerospace Center: elib - DLR electronic library Journal of The Electrochemical Society 168 5 050531 |
institution |
Open Polar |
collection |
German Aerospace Center: elib - DLR electronic library |
op_collection_id |
ftdlr |
language |
English |
topic |
Elektrochemische Energietechnik |
spellingShingle |
Elektrochemische Energietechnik Kube, Alexander Wagner, Norbert Friedrich, K. Andreas Influence of Organic Additives for Zinc-Air Batteries on Cathode Stability and Performance |
topic_facet |
Elektrochemische Energietechnik |
description |
In this work, a theoretically predicted electrolyte composition comprising 6 M potassium hydroxide (KOH), 2 M citric acid, 1 M glycine, and 0.5 M zinc oxide is tested in terms of electrochemical performance, cathode stability, and electrolyte stability. It is shown that dissolved metal ions from the cathode reacted with the introduced organic additives, reduced the cathode stability, and blocked metal oxidation reactions. This was due to a Kolbe-like decomposition reaction that occurred because of the presence of potassium citrate, which formed because of the reaction of KOH and citric acid. Furthermore, intermediate products of this decomposition reaction appeared to block the cathode's surface, hindering oxygen (O2) evolution and reducing the overall cell performance. The decomposition of potassium citrate starts above 1.7 V Zn. Additionally, it is shown that tribase citric acid behaves similarly to a dibase carbonic acid. Both decrease the onset potential for the O2 reduction reaction from 0.9 V vs reversible hydrogen electrode (RHE) for pure 6 M KOH to 0.6 V vs RHE for KOH with these organic acids. |
format |
Article in Journal/Newspaper |
author |
Kube, Alexander Wagner, Norbert Friedrich, K. Andreas |
author_facet |
Kube, Alexander Wagner, Norbert Friedrich, K. Andreas |
author_sort |
Kube, Alexander |
title |
Influence of Organic Additives for Zinc-Air Batteries on Cathode Stability and Performance |
title_short |
Influence of Organic Additives for Zinc-Air Batteries on Cathode Stability and Performance |
title_full |
Influence of Organic Additives for Zinc-Air Batteries on Cathode Stability and Performance |
title_fullStr |
Influence of Organic Additives for Zinc-Air Batteries on Cathode Stability and Performance |
title_full_unstemmed |
Influence of Organic Additives for Zinc-Air Batteries on Cathode Stability and Performance |
title_sort |
influence of organic additives for zinc-air batteries on cathode stability and performance |
publisher |
Electrochemical Society, Inc. |
publishDate |
2021 |
url |
https://elib.dlr.de/142334/ https://elib.dlr.de/142334/1/Kube_2021_J._Electrochem._Soc._168_050531.pdf https://iopscience.iop.org/article/10.1149/1945-7111/abff63 |
genre |
Carbonic acid |
genre_facet |
Carbonic acid |
op_relation |
https://elib.dlr.de/142334/1/Kube_2021_J._Electrochem._Soc._168_050531.pdf Kube, Alexander und Wagner, Norbert und Friedrich, K. Andreas (2021) Influence of Organic Additives for Zinc-Air Batteries on Cathode Stability and Performance. Journal of The Electrochemical Society, 168 (050531). Electrochemical Society, Inc. doi:10.1149/1945-7111/abff63 <https://doi.org/10.1149/1945-7111/abff63>. ISSN 0013-4651. |
op_rights |
info:eu-repo/semantics/closedAccess |
op_doi |
https://doi.org/10.1149/1945-7111/abff63 |
container_title |
Journal of The Electrochemical Society |
container_volume |
168 |
container_issue |
5 |
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050531 |
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1766387810709798912 |