Capillary Electrophoresis as Analysis Technique for Battery Electrolytes: (i) Monitoring Stability of Anions in Ionic Liquids and (ii) Determination of Organophosphate-Based Decomposition Products in LiPF6-Based Lithium Ion Battery Electrolytes
In this work, a method for capillary electrophoresis (CE) hyphenated to a high-resolution mass spectrometer was presented for monitoring the stability of anions in ionic liquids (ILs) and in commonly used lithium ion battery (LIB) electrolytes. The investigated ILs were 1-methyl-1-propylpyrrolidiniu...
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MDPI AG
2017-09-01
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| Online Access: | https://www.mdpi.com/2297-8739/4/3/26 |
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| author | Marcelina Pyschik Martin Winter Sascha Nowak |
| author_facet | Marcelina Pyschik Martin Winter Sascha Nowak |
| author_sort | Marcelina Pyschik |
| collection | DOAJ |
| description | In this work, a method for capillary electrophoresis (CE) hyphenated to a high-resolution mass spectrometer was presented for monitoring the stability of anions in ionic liquids (ILs) and in commonly used lithium ion battery (LIB) electrolytes. The investigated ILs were 1-methyl-1-propylpyrrolidinium bis(trifluoromethanesulfonyl)imide (PYR13TFSI) and 1-methyl-1-propylpyrrolidinium bis(fluorosulfonyl)imide (PYR13FSI). The method development was conducted by adjusting the following parameters: buffer compositions, buffer concentrations, and the pH value. Also the temperature and the voltage applied on the capillary were optimized. The ILs were aged at room temperature and at 60 °C for 16 months each. At both temperatures, no anionic decomposition products of the FSI− and TFSI− anions were detected. Accordingly, the FSI− and TFSI− anions were thermally stable at these conditions. This method was also applied for the investigation of LIB electrolyte samples, which were aged at 60 °C for one month. The LP30 (50/50 wt. % dimethyl carbonate/ethylene carbonate and 1 M lithium hexafluorophosphate) electrolyte was mixed with the additive 1,3-propane sultone (PS) and with one of the following organophosphates (OP): dimethyl phosphate (DMP), diethyl phosphate (DEP), and triethyl phosphate (TEP), to investigate the influence of these compounds on the formation of OPs. |
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| language | English |
| last_indexed | 2024-04-13T09:00:11Z |
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| spelling | doaj.art-b07745c13ca842eb868dad824364588d2022-12-22T02:53:09ZengMDPI AGSeparations2297-87392017-09-01432610.3390/separations4030026separations4030026Capillary Electrophoresis as Analysis Technique for Battery Electrolytes: (i) Monitoring Stability of Anions in Ionic Liquids and (ii) Determination of Organophosphate-Based Decomposition Products in LiPF6-Based Lithium Ion Battery ElectrolytesMarcelina Pyschik0Martin Winter1Sascha Nowak2MEET Battery Research Center, Institute of Physical Chemistry, University of Muenster, Corrensstraße 46, 48149 Muenster, Germany; marcelina.pyschik@uni-muenster.deMEET Battery Research Center, Institute of Physical Chemistry, University of Muenster, Corrensstraße 46, 48149 Muenster, Germany; marcelina.pyschik@uni-muenster.deMEET Battery Research Center, Institute of Physical Chemistry, University of Muenster, Corrensstraße 46, 48149 Muenster, Germany; marcelina.pyschik@uni-muenster.deIn this work, a method for capillary electrophoresis (CE) hyphenated to a high-resolution mass spectrometer was presented for monitoring the stability of anions in ionic liquids (ILs) and in commonly used lithium ion battery (LIB) electrolytes. The investigated ILs were 1-methyl-1-propylpyrrolidinium bis(trifluoromethanesulfonyl)imide (PYR13TFSI) and 1-methyl-1-propylpyrrolidinium bis(fluorosulfonyl)imide (PYR13FSI). The method development was conducted by adjusting the following parameters: buffer compositions, buffer concentrations, and the pH value. Also the temperature and the voltage applied on the capillary were optimized. The ILs were aged at room temperature and at 60 °C for 16 months each. At both temperatures, no anionic decomposition products of the FSI− and TFSI− anions were detected. Accordingly, the FSI− and TFSI− anions were thermally stable at these conditions. This method was also applied for the investigation of LIB electrolyte samples, which were aged at 60 °C for one month. The LP30 (50/50 wt. % dimethyl carbonate/ethylene carbonate and 1 M lithium hexafluorophosphate) electrolyte was mixed with the additive 1,3-propane sultone (PS) and with one of the following organophosphates (OP): dimethyl phosphate (DMP), diethyl phosphate (DEP), and triethyl phosphate (TEP), to investigate the influence of these compounds on the formation of OPs.https://www.mdpi.com/2297-8739/4/3/26ionic liquidscapillary electrophoresisquadrupole time-of-flight mass spectrometerthermal stability studylithium ion battery electrolyte |
| spellingShingle | Marcelina Pyschik Martin Winter Sascha Nowak Capillary Electrophoresis as Analysis Technique for Battery Electrolytes: (i) Monitoring Stability of Anions in Ionic Liquids and (ii) Determination of Organophosphate-Based Decomposition Products in LiPF6-Based Lithium Ion Battery Electrolytes Separations ionic liquids capillary electrophoresis quadrupole time-of-flight mass spectrometer thermal stability study lithium ion battery electrolyte |
| title | Capillary Electrophoresis as Analysis Technique for Battery Electrolytes: (i) Monitoring Stability of Anions in Ionic Liquids and (ii) Determination of Organophosphate-Based Decomposition Products in LiPF6-Based Lithium Ion Battery Electrolytes |
| title_full | Capillary Electrophoresis as Analysis Technique for Battery Electrolytes: (i) Monitoring Stability of Anions in Ionic Liquids and (ii) Determination of Organophosphate-Based Decomposition Products in LiPF6-Based Lithium Ion Battery Electrolytes |
| title_fullStr | Capillary Electrophoresis as Analysis Technique for Battery Electrolytes: (i) Monitoring Stability of Anions in Ionic Liquids and (ii) Determination of Organophosphate-Based Decomposition Products in LiPF6-Based Lithium Ion Battery Electrolytes |
| title_full_unstemmed | Capillary Electrophoresis as Analysis Technique for Battery Electrolytes: (i) Monitoring Stability of Anions in Ionic Liquids and (ii) Determination of Organophosphate-Based Decomposition Products in LiPF6-Based Lithium Ion Battery Electrolytes |
| title_short | Capillary Electrophoresis as Analysis Technique for Battery Electrolytes: (i) Monitoring Stability of Anions in Ionic Liquids and (ii) Determination of Organophosphate-Based Decomposition Products in LiPF6-Based Lithium Ion Battery Electrolytes |
| title_sort | capillary electrophoresis as analysis technique for battery electrolytes i monitoring stability of anions in ionic liquids and ii determination of organophosphate based decomposition products in lipf6 based lithium ion battery electrolytes |
| topic | ionic liquids capillary electrophoresis quadrupole time-of-flight mass spectrometer thermal stability study lithium ion battery electrolyte |
| url | https://www.mdpi.com/2297-8739/4/3/26 |
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