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Sodium Borates: Expanding the Electrolyte Selection for Sodium‐Ion Batteries

Sodium‐ion batteries (SIBs) are a promising grid‐level storage technology due to the abundance and low cost of sodium. The development of new electrolytes for SIBs is imperative since it impacts battery life and capacity. Currently, sodium hexafluorophosphate (NaPF(6)) is used as the benchmark salt,...

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Autores principales: Ould, Darren M. C., Menkin, Svetlana, Smith, Holly E., Riesgo‐Gonzalez, Victor, Jónsson, Erlendur, O'Keefe, Christopher A., Coowar, Fazlil, Barker, Jerry, Bond, Andrew D., Grey, Clare P., Wright, Dominic S.
Formato: Online Artículo Texto
Lenguaje:English
Publicado: John Wiley and Sons Inc. 2022
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9401571/
https://www.ncbi.nlm.nih.gov/pubmed/35415950
http://dx.doi.org/10.1002/anie.202202133
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author Ould, Darren M. C.
Menkin, Svetlana
Smith, Holly E.
Riesgo‐Gonzalez, Victor
Jónsson, Erlendur
O'Keefe, Christopher A.
Coowar, Fazlil
Barker, Jerry
Bond, Andrew D.
Grey, Clare P.
Wright, Dominic S.
author_facet Ould, Darren M. C.
Menkin, Svetlana
Smith, Holly E.
Riesgo‐Gonzalez, Victor
Jónsson, Erlendur
O'Keefe, Christopher A.
Coowar, Fazlil
Barker, Jerry
Bond, Andrew D.
Grey, Clare P.
Wright, Dominic S.
author_sort Ould, Darren M. C.
collection PubMed
description Sodium‐ion batteries (SIBs) are a promising grid‐level storage technology due to the abundance and low cost of sodium. The development of new electrolytes for SIBs is imperative since it impacts battery life and capacity. Currently, sodium hexafluorophosphate (NaPF(6)) is used as the benchmark salt, but is highly hygroscopic and generates toxic HF. This work describes the synthesis of a series of sodium borate salts, with electrochemical studies revealing that Na[B(hfip)(4)]⋅DME (hfip=hexafluoroisopropyloxy, O(i)Pr(F)) and Na[B(pp)(2)] (pp=perfluorinated pinacolato, O(2)C(2)(CF(3))(4)) have excellent electrochemical performance. The [B(pp)(2)](−) anion also exhibits a high tolerance to air and water. Both electrolytes give more stable electrode‐electrolyte interfaces than conventionally used NaPF(6), as demonstrated by impedance spectroscopy and cyclic voltammetry. Furthermore, they give greater cycling stability and comparable capacity to NaPF(6) for SIBs, as shown in commercial pouch cells.
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spelling pubmed-94015712022-08-26 Sodium Borates: Expanding the Electrolyte Selection for Sodium‐Ion Batteries Ould, Darren M. C. Menkin, Svetlana Smith, Holly E. Riesgo‐Gonzalez, Victor Jónsson, Erlendur O'Keefe, Christopher A. Coowar, Fazlil Barker, Jerry Bond, Andrew D. Grey, Clare P. Wright, Dominic S. Angew Chem Int Ed Engl Research Articles Sodium‐ion batteries (SIBs) are a promising grid‐level storage technology due to the abundance and low cost of sodium. The development of new electrolytes for SIBs is imperative since it impacts battery life and capacity. Currently, sodium hexafluorophosphate (NaPF(6)) is used as the benchmark salt, but is highly hygroscopic and generates toxic HF. This work describes the synthesis of a series of sodium borate salts, with electrochemical studies revealing that Na[B(hfip)(4)]⋅DME (hfip=hexafluoroisopropyloxy, O(i)Pr(F)) and Na[B(pp)(2)] (pp=perfluorinated pinacolato, O(2)C(2)(CF(3))(4)) have excellent electrochemical performance. The [B(pp)(2)](−) anion also exhibits a high tolerance to air and water. Both electrolytes give more stable electrode‐electrolyte interfaces than conventionally used NaPF(6), as demonstrated by impedance spectroscopy and cyclic voltammetry. Furthermore, they give greater cycling stability and comparable capacity to NaPF(6) for SIBs, as shown in commercial pouch cells. John Wiley and Sons Inc. 2022-05-03 2022-08-08 /pmc/articles/PMC9401571/ /pubmed/35415950 http://dx.doi.org/10.1002/anie.202202133 Text en © 2022 The Authors. Angewandte Chemie International Edition 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 Research Articles
Ould, Darren M. C.
Menkin, Svetlana
Smith, Holly E.
Riesgo‐Gonzalez, Victor
Jónsson, Erlendur
O'Keefe, Christopher A.
Coowar, Fazlil
Barker, Jerry
Bond, Andrew D.
Grey, Clare P.
Wright, Dominic S.
Sodium Borates: Expanding the Electrolyte Selection for Sodium‐Ion Batteries
title Sodium Borates: Expanding the Electrolyte Selection for Sodium‐Ion Batteries
title_full Sodium Borates: Expanding the Electrolyte Selection for Sodium‐Ion Batteries
title_fullStr Sodium Borates: Expanding the Electrolyte Selection for Sodium‐Ion Batteries
title_full_unstemmed Sodium Borates: Expanding the Electrolyte Selection for Sodium‐Ion Batteries
title_short Sodium Borates: Expanding the Electrolyte Selection for Sodium‐Ion Batteries
title_sort sodium borates: expanding the electrolyte selection for sodium‐ion batteries
topic Research Articles
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9401571/
https://www.ncbi.nlm.nih.gov/pubmed/35415950
http://dx.doi.org/10.1002/anie.202202133
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