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A novel calcium fluorinated alkoxyaluminate salt as a next step towards Ca metal anode rechargeable batteries

Ca metal anode rechargeable batteries are seen as a sustainable high-energy density and high-voltage alternative to the current Li-ion battery technology due to the low redox potential of Ca metal and abundance of Ca. Electrolytes are key enablers on the path towards next-generation battery systems....

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Autores principales: Pavčnik, Tjaša, Forero-Saboya, Juan D., Ponrouch, Alexandre, Robba, Ana, Dominko, Robert, Bitenc, Jan
Formato: Online Artículo Texto
Lenguaje:English
Publicado: The Royal Society of Chemistry 2023
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10335333/
https://www.ncbi.nlm.nih.gov/pubmed/37441279
http://dx.doi.org/10.1039/d3ta02084c
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author Pavčnik, Tjaša
Forero-Saboya, Juan D.
Ponrouch, Alexandre
Robba, Ana
Dominko, Robert
Bitenc, Jan
author_facet Pavčnik, Tjaša
Forero-Saboya, Juan D.
Ponrouch, Alexandre
Robba, Ana
Dominko, Robert
Bitenc, Jan
author_sort Pavčnik, Tjaša
collection PubMed
description Ca metal anode rechargeable batteries are seen as a sustainable high-energy density and high-voltage alternative to the current Li-ion battery technology due to the low redox potential of Ca metal and abundance of Ca. Electrolytes are key enablers on the path towards next-generation battery systems. Within this work, we synthesize a new calcium tetrakis(hexafluoroisopropyloxy) aluminate salt, Ca[Al(hfip)(4)](2), and benchmark it versus the state-of-the-art boron analogue Ca[B(hfip)(4)](2). The newly developed aluminate-based electrolyte exhibits improved performance in terms of conductivity, Ca plating/stripping efficiency, and oxidative stability as well as Ca battery cell performance. A marked improvement of 0.5 V higher oxidative stability can pave the path towards high-voltage Ca batteries. A critical issue of solvent quality during salt synthesis is identified as well as solvent decomposition at the Ca metal/electrolyte interface, which leads to passivation of the Ca metal anode. However, the new aluminate salt with preferable electrochemical properties over the existing boron analogue opens up a new area for future Ca battery research based on aluminium compounds.
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spelling pubmed-103353332023-07-12 A novel calcium fluorinated alkoxyaluminate salt as a next step towards Ca metal anode rechargeable batteries Pavčnik, Tjaša Forero-Saboya, Juan D. Ponrouch, Alexandre Robba, Ana Dominko, Robert Bitenc, Jan J Mater Chem A Mater Chemistry Ca metal anode rechargeable batteries are seen as a sustainable high-energy density and high-voltage alternative to the current Li-ion battery technology due to the low redox potential of Ca metal and abundance of Ca. Electrolytes are key enablers on the path towards next-generation battery systems. Within this work, we synthesize a new calcium tetrakis(hexafluoroisopropyloxy) aluminate salt, Ca[Al(hfip)(4)](2), and benchmark it versus the state-of-the-art boron analogue Ca[B(hfip)(4)](2). The newly developed aluminate-based electrolyte exhibits improved performance in terms of conductivity, Ca plating/stripping efficiency, and oxidative stability as well as Ca battery cell performance. A marked improvement of 0.5 V higher oxidative stability can pave the path towards high-voltage Ca batteries. A critical issue of solvent quality during salt synthesis is identified as well as solvent decomposition at the Ca metal/electrolyte interface, which leads to passivation of the Ca metal anode. However, the new aluminate salt with preferable electrochemical properties over the existing boron analogue opens up a new area for future Ca battery research based on aluminium compounds. The Royal Society of Chemistry 2023-05-23 /pmc/articles/PMC10335333/ /pubmed/37441279 http://dx.doi.org/10.1039/d3ta02084c Text en This journal is © The Royal Society of Chemistry https://creativecommons.org/licenses/by/3.0/
spellingShingle Chemistry
Pavčnik, Tjaša
Forero-Saboya, Juan D.
Ponrouch, Alexandre
Robba, Ana
Dominko, Robert
Bitenc, Jan
A novel calcium fluorinated alkoxyaluminate salt as a next step towards Ca metal anode rechargeable batteries
title A novel calcium fluorinated alkoxyaluminate salt as a next step towards Ca metal anode rechargeable batteries
title_full A novel calcium fluorinated alkoxyaluminate salt as a next step towards Ca metal anode rechargeable batteries
title_fullStr A novel calcium fluorinated alkoxyaluminate salt as a next step towards Ca metal anode rechargeable batteries
title_full_unstemmed A novel calcium fluorinated alkoxyaluminate salt as a next step towards Ca metal anode rechargeable batteries
title_short A novel calcium fluorinated alkoxyaluminate salt as a next step towards Ca metal anode rechargeable batteries
title_sort novel calcium fluorinated alkoxyaluminate salt as a next step towards ca metal anode rechargeable batteries
topic Chemistry
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10335333/
https://www.ncbi.nlm.nih.gov/pubmed/37441279
http://dx.doi.org/10.1039/d3ta02084c
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