Structure–Property Correlations in Aqueous Binary Na(+)/K(+)–CH(3)COO(–) Highly Concentrated Electrolytes

[Image: see text] Highly concentrated aqueous binary solutions of acetate salts are promising systems for different electrochemical applications, for example, energy storage devices. The very high solubility of CH(3)COOK allows us to obtain water-in-salt electrolyte concentrations, thus reducing ion...

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Autores principales: Khalid, Shahid, Pianta, Nicolò, Bonizzoni, Simone, Ferrara, Chiara, Lorenzi, Roberto, Paleari, Alberto, Johansson, Patrik, Mustarelli, Piercarlo, Ruffo, Riccardo
Formato: Online Artículo Texto
Lenguaje:English
Publicado: American Chemical Society 2023
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10226112/
https://www.ncbi.nlm.nih.gov/pubmed/37255926
http://dx.doi.org/10.1021/acs.jpcc.3c01017
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author Khalid, Shahid
Pianta, Nicolò
Bonizzoni, Simone
Ferrara, Chiara
Lorenzi, Roberto
Paleari, Alberto
Johansson, Patrik
Mustarelli, Piercarlo
Ruffo, Riccardo
author_facet Khalid, Shahid
Pianta, Nicolò
Bonizzoni, Simone
Ferrara, Chiara
Lorenzi, Roberto
Paleari, Alberto
Johansson, Patrik
Mustarelli, Piercarlo
Ruffo, Riccardo
author_sort Khalid, Shahid
collection PubMed
description [Image: see text] Highly concentrated aqueous binary solutions of acetate salts are promising systems for different electrochemical applications, for example, energy storage devices. The very high solubility of CH(3)COOK allows us to obtain water-in-salt electrolyte concentrations, thus reducing ion activity and extending the cathodic stability of an aqueous electrolyte. At the same time, the presence of Li(+) or Na(+) makes these solutions compatible with intercalation materials for the development of rechargeable alkaline-ion batteries. Although there is a growing interest in these systems, a fundamental understanding of their physicochemical properties is still lacking. Here, we report and discuss the physicochemical and electrochemical properties of a series of solutions based on 20 mol kg(–1) CH(3)COOK with different concentrations of CH(3)COONa. The most concentrated solution, 20 mol kg(–1) CH(3)COOK + 7 mol kg(–1) CH(3)COONa, gives the best compromise between transport properties and electrochemical stability, displaying a conductivity of 21.2 mS cm(–1) at 25 °C and a stability window of up to 3 V in “ideal” conditions, i.e., using a small surface area and highly electrocatalytic electrode in a flooded cell. Careful Raman spectroscopy analyses help to address the interaction network, the phase evolution with temperature, and the crystallization kinetics.
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spelling pubmed-102261122023-05-30 Structure–Property Correlations in Aqueous Binary Na(+)/K(+)–CH(3)COO(–) Highly Concentrated Electrolytes Khalid, Shahid Pianta, Nicolò Bonizzoni, Simone Ferrara, Chiara Lorenzi, Roberto Paleari, Alberto Johansson, Patrik Mustarelli, Piercarlo Ruffo, Riccardo J Phys Chem C Nanomater Interfaces [Image: see text] Highly concentrated aqueous binary solutions of acetate salts are promising systems for different electrochemical applications, for example, energy storage devices. The very high solubility of CH(3)COOK allows us to obtain water-in-salt electrolyte concentrations, thus reducing ion activity and extending the cathodic stability of an aqueous electrolyte. At the same time, the presence of Li(+) or Na(+) makes these solutions compatible with intercalation materials for the development of rechargeable alkaline-ion batteries. Although there is a growing interest in these systems, a fundamental understanding of their physicochemical properties is still lacking. Here, we report and discuss the physicochemical and electrochemical properties of a series of solutions based on 20 mol kg(–1) CH(3)COOK with different concentrations of CH(3)COONa. The most concentrated solution, 20 mol kg(–1) CH(3)COOK + 7 mol kg(–1) CH(3)COONa, gives the best compromise between transport properties and electrochemical stability, displaying a conductivity of 21.2 mS cm(–1) at 25 °C and a stability window of up to 3 V in “ideal” conditions, i.e., using a small surface area and highly electrocatalytic electrode in a flooded cell. Careful Raman spectroscopy analyses help to address the interaction network, the phase evolution with temperature, and the crystallization kinetics. American Chemical Society 2023-05-13 /pmc/articles/PMC10226112/ /pubmed/37255926 http://dx.doi.org/10.1021/acs.jpcc.3c01017 Text en © 2023 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 Khalid, Shahid
Pianta, Nicolò
Bonizzoni, Simone
Ferrara, Chiara
Lorenzi, Roberto
Paleari, Alberto
Johansson, Patrik
Mustarelli, Piercarlo
Ruffo, Riccardo
Structure–Property Correlations in Aqueous Binary Na(+)/K(+)–CH(3)COO(–) Highly Concentrated Electrolytes
title Structure–Property Correlations in Aqueous Binary Na(+)/K(+)–CH(3)COO(–) Highly Concentrated Electrolytes
title_full Structure–Property Correlations in Aqueous Binary Na(+)/K(+)–CH(3)COO(–) Highly Concentrated Electrolytes
title_fullStr Structure–Property Correlations in Aqueous Binary Na(+)/K(+)–CH(3)COO(–) Highly Concentrated Electrolytes
title_full_unstemmed Structure–Property Correlations in Aqueous Binary Na(+)/K(+)–CH(3)COO(–) Highly Concentrated Electrolytes
title_short Structure–Property Correlations in Aqueous Binary Na(+)/K(+)–CH(3)COO(–) Highly Concentrated Electrolytes
title_sort structure–property correlations in aqueous binary na(+)/k(+)–ch(3)coo(–) highly concentrated electrolytes
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10226112/
https://www.ncbi.nlm.nih.gov/pubmed/37255926
http://dx.doi.org/10.1021/acs.jpcc.3c01017
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