Cargando…

Impact of electrolyte decomposition products on the electrochemical performance of 4 V class K-ion batteries

In the pursuit of long-life K-ion batteries (KIBs), half-cell measurements using highly reactive K metal counter electrodes are a standard practice. However, there is increasing evidence of electrolyte decomposition by K metal impacting electrode performance. Herein, we systematically explored the K...

Descripción completa

Detalles Bibliográficos
Autores principales: Hosaka, Tomooki, Matsuyama, Tatsuo, Tatara, Ryoichi, Gossage, Zachary T., Komaba, Shinichi
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/PMC10445460/
https://www.ncbi.nlm.nih.gov/pubmed/37621426
http://dx.doi.org/10.1039/d3sc02111d
_version_ 1785094176204914688
author Hosaka, Tomooki
Matsuyama, Tatsuo
Tatara, Ryoichi
Gossage, Zachary T.
Komaba, Shinichi
author_facet Hosaka, Tomooki
Matsuyama, Tatsuo
Tatara, Ryoichi
Gossage, Zachary T.
Komaba, Shinichi
author_sort Hosaka, Tomooki
collection PubMed
description In the pursuit of long-life K-ion batteries (KIBs), half-cell measurements using highly reactive K metal counter electrodes are a standard practice. However, there is increasing evidence of electrolyte decomposition by K metal impacting electrode performance. Herein, we systematically explored the K metal-treated electrolytes KPF(6), KN(SO(2)F)(2) (KFSA), and their combination in ethylene carbonate/diethyl carbonate (EC/DEC), referred to as K-KPF(6), K-KFSA, and K-KPF(6):KFSA, respectively, after storage in contact with K metal. Through mass spectrometry analysis, we identified significant formation of carbonate ester-derived decomposition products such as oligocarbonates for K-KPF(6), while K-KFSA predominantly generates anions combining FSA(−) with the solvent structures. Using three-electrode cells, we delineated the positive effects of the K-KFSA and K-KPF(6):KFSA electrolytes on graphite negative electrode performance and the negative impact of oligocarbonates in K-KPF(6) on K(2)Mn[Fe(CN)(6)] positive electrodes. The interactions between the decomposition products and the electrodes were further evaluated using density functional theory calculations. Full cell measurements using K-KPF(6):KFSA showed an improved energy density and capacity retention of 78% after 500 cycles compared with an untreated electrolyte (72%). Hard X-ray photoelectron spectroscopy indicated the incorporation of the FSA-derived structures into the solid electrolyte interphase at graphite, which was not observed in K metal-free cells. Overall, this work indicates further complexities to consider in KIB measurements and suggests the potential application of decomposition products as electrolyte additives.
format Online
Article
Text
id pubmed-10445460
institution National Center for Biotechnology Information
language English
publishDate 2023
publisher The Royal Society of Chemistry
record_format MEDLINE/PubMed
spelling pubmed-104454602023-08-24 Impact of electrolyte decomposition products on the electrochemical performance of 4 V class K-ion batteries Hosaka, Tomooki Matsuyama, Tatsuo Tatara, Ryoichi Gossage, Zachary T. Komaba, Shinichi Chem Sci Chemistry In the pursuit of long-life K-ion batteries (KIBs), half-cell measurements using highly reactive K metal counter electrodes are a standard practice. However, there is increasing evidence of electrolyte decomposition by K metal impacting electrode performance. Herein, we systematically explored the K metal-treated electrolytes KPF(6), KN(SO(2)F)(2) (KFSA), and their combination in ethylene carbonate/diethyl carbonate (EC/DEC), referred to as K-KPF(6), K-KFSA, and K-KPF(6):KFSA, respectively, after storage in contact with K metal. Through mass spectrometry analysis, we identified significant formation of carbonate ester-derived decomposition products such as oligocarbonates for K-KPF(6), while K-KFSA predominantly generates anions combining FSA(−) with the solvent structures. Using three-electrode cells, we delineated the positive effects of the K-KFSA and K-KPF(6):KFSA electrolytes on graphite negative electrode performance and the negative impact of oligocarbonates in K-KPF(6) on K(2)Mn[Fe(CN)(6)] positive electrodes. The interactions between the decomposition products and the electrodes were further evaluated using density functional theory calculations. Full cell measurements using K-KPF(6):KFSA showed an improved energy density and capacity retention of 78% after 500 cycles compared with an untreated electrolyte (72%). Hard X-ray photoelectron spectroscopy indicated the incorporation of the FSA-derived structures into the solid electrolyte interphase at graphite, which was not observed in K metal-free cells. Overall, this work indicates further complexities to consider in KIB measurements and suggests the potential application of decomposition products as electrolyte additives. The Royal Society of Chemistry 2023-07-12 /pmc/articles/PMC10445460/ /pubmed/37621426 http://dx.doi.org/10.1039/d3sc02111d Text en This journal is © The Royal Society of Chemistry https://creativecommons.org/licenses/by-nc/3.0/
spellingShingle Chemistry
Hosaka, Tomooki
Matsuyama, Tatsuo
Tatara, Ryoichi
Gossage, Zachary T.
Komaba, Shinichi
Impact of electrolyte decomposition products on the electrochemical performance of 4 V class K-ion batteries
title Impact of electrolyte decomposition products on the electrochemical performance of 4 V class K-ion batteries
title_full Impact of electrolyte decomposition products on the electrochemical performance of 4 V class K-ion batteries
title_fullStr Impact of electrolyte decomposition products on the electrochemical performance of 4 V class K-ion batteries
title_full_unstemmed Impact of electrolyte decomposition products on the electrochemical performance of 4 V class K-ion batteries
title_short Impact of electrolyte decomposition products on the electrochemical performance of 4 V class K-ion batteries
title_sort impact of electrolyte decomposition products on the electrochemical performance of 4 v class k-ion batteries
topic Chemistry
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10445460/
https://www.ncbi.nlm.nih.gov/pubmed/37621426
http://dx.doi.org/10.1039/d3sc02111d
work_keys_str_mv AT hosakatomooki impactofelectrolytedecompositionproductsontheelectrochemicalperformanceof4vclasskionbatteries
AT matsuyamatatsuo impactofelectrolytedecompositionproductsontheelectrochemicalperformanceof4vclasskionbatteries
AT tatararyoichi impactofelectrolytedecompositionproductsontheelectrochemicalperformanceof4vclasskionbatteries
AT gossagezacharyt impactofelectrolytedecompositionproductsontheelectrochemicalperformanceof4vclasskionbatteries
AT komabashinichi impactofelectrolytedecompositionproductsontheelectrochemicalperformanceof4vclasskionbatteries