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The role of ethylene carbonate (EC) and tetramethylene sulfone (SL) in the dissolution of transition metals from lithium-ion cathodes

Transition metal (TM) dissolution is a direct consequence of cathode–electrolyte interaction, having implications not only for the loss of redox-active material from the cathode but also for the alteration of solid electrolyte interphase (SEI) composition and stability at the counter electrode. It h...

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Autores principales: Tesfamhret, Yonas, Liu, Haidong, Berg, Erik J., Younesi, Reza
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/PMC10331795/
https://www.ncbi.nlm.nih.gov/pubmed/37435367
http://dx.doi.org/10.1039/d3ra02535g
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author Tesfamhret, Yonas
Liu, Haidong
Berg, Erik J.
Younesi, Reza
author_facet Tesfamhret, Yonas
Liu, Haidong
Berg, Erik J.
Younesi, Reza
author_sort Tesfamhret, Yonas
collection PubMed
description Transition metal (TM) dissolution is a direct consequence of cathode–electrolyte interaction, having implications not only for the loss of redox-active material from the cathode but also for the alteration of solid electrolyte interphase (SEI) composition and stability at the counter electrode. It has widely been reported that the limited anodic stability of typical carbonate-based electrolytes, specifically ethylene carbonate (EC)-based electrolytes, makes high-voltage cathode performance problematic. Hence, the more anodically stable tetramethylene sulfone (SL) has herein been utilized as a co-solvent and a substitute for EC in combination with diethyl carbonate (DEC) to investigate the TM dissolution behavior of LiN(0.8)C(0.17)Al(0.03) (NCA) and LiMn(2)O(4) (LMO). EC|DEC and SL|DEC solvents in combination with either LiPF(6) or LiBOB salts have been evaluated, with LFP as a counter electrode to eliminate the influence of low potential anodes. Oxidative degradation of EC is shown to propagate HF generation, which is conversely reflected by an increased TM dissolution. Therefore, TM dissolution is accelerated by the acidification of the electrolyte. Although replacing EC with the anodically stable SL reduces HF generation and effectively mitigates TM dissolution, SL containing electrolytes are demonstrated to be less capable of supporting Li-ion transport and thus show lower cycling stability.
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spelling pubmed-103317952023-07-11 The role of ethylene carbonate (EC) and tetramethylene sulfone (SL) in the dissolution of transition metals from lithium-ion cathodes Tesfamhret, Yonas Liu, Haidong Berg, Erik J. Younesi, Reza RSC Adv Chemistry Transition metal (TM) dissolution is a direct consequence of cathode–electrolyte interaction, having implications not only for the loss of redox-active material from the cathode but also for the alteration of solid electrolyte interphase (SEI) composition and stability at the counter electrode. It has widely been reported that the limited anodic stability of typical carbonate-based electrolytes, specifically ethylene carbonate (EC)-based electrolytes, makes high-voltage cathode performance problematic. Hence, the more anodically stable tetramethylene sulfone (SL) has herein been utilized as a co-solvent and a substitute for EC in combination with diethyl carbonate (DEC) to investigate the TM dissolution behavior of LiN(0.8)C(0.17)Al(0.03) (NCA) and LiMn(2)O(4) (LMO). EC|DEC and SL|DEC solvents in combination with either LiPF(6) or LiBOB salts have been evaluated, with LFP as a counter electrode to eliminate the influence of low potential anodes. Oxidative degradation of EC is shown to propagate HF generation, which is conversely reflected by an increased TM dissolution. Therefore, TM dissolution is accelerated by the acidification of the electrolyte. Although replacing EC with the anodically stable SL reduces HF generation and effectively mitigates TM dissolution, SL containing electrolytes are demonstrated to be less capable of supporting Li-ion transport and thus show lower cycling stability. The Royal Society of Chemistry 2023-07-10 /pmc/articles/PMC10331795/ /pubmed/37435367 http://dx.doi.org/10.1039/d3ra02535g Text en This journal is © The Royal Society of Chemistry https://creativecommons.org/licenses/by/3.0/
spellingShingle Chemistry
Tesfamhret, Yonas
Liu, Haidong
Berg, Erik J.
Younesi, Reza
The role of ethylene carbonate (EC) and tetramethylene sulfone (SL) in the dissolution of transition metals from lithium-ion cathodes
title The role of ethylene carbonate (EC) and tetramethylene sulfone (SL) in the dissolution of transition metals from lithium-ion cathodes
title_full The role of ethylene carbonate (EC) and tetramethylene sulfone (SL) in the dissolution of transition metals from lithium-ion cathodes
title_fullStr The role of ethylene carbonate (EC) and tetramethylene sulfone (SL) in the dissolution of transition metals from lithium-ion cathodes
title_full_unstemmed The role of ethylene carbonate (EC) and tetramethylene sulfone (SL) in the dissolution of transition metals from lithium-ion cathodes
title_short The role of ethylene carbonate (EC) and tetramethylene sulfone (SL) in the dissolution of transition metals from lithium-ion cathodes
title_sort role of ethylene carbonate (ec) and tetramethylene sulfone (sl) in the dissolution of transition metals from lithium-ion cathodes
topic Chemistry
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10331795/
https://www.ncbi.nlm.nih.gov/pubmed/37435367
http://dx.doi.org/10.1039/d3ra02535g
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