Effect of conducting salts in ionic liquid electrolytes for enhanced cyclability of sodium-ion batteries
The electrochemical performance of ionic liquid electrolytes containing different sodium salts dissolved in 1-butyl-1-methylpyrrolidinium bis(trifluoromethylsulfonyl)imide (BMPTFSI) evaluated in a half-cell configuration using spherical P2-Na0.6Co0.1Mn0.9O2+z (NCO) cathodes are reported. Among the v...
| Main Authors: | , , , , , , , , |
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| Format: | Journal Article |
| Language: | English |
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2020
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| Online Access: | https://hdl.handle.net/10356/140730 |
| _version_ | 1811691053473857536 |
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| author | Do, Minh Phuong Bucher, Nicolas Nagasubramanian, Arun Markovits, Iulius Tian, Bingbing Fischer, Pauline J. Loh, Kian Ping Kühn, Fritz E. Srinivasan, Madhavi |
| author2 | School of Materials Science and Engineering |
| author_facet | School of Materials Science and Engineering Do, Minh Phuong Bucher, Nicolas Nagasubramanian, Arun Markovits, Iulius Tian, Bingbing Fischer, Pauline J. Loh, Kian Ping Kühn, Fritz E. Srinivasan, Madhavi |
| author_sort | Do, Minh Phuong |
| collection | NTU |
| description | The electrochemical performance of ionic liquid electrolytes containing different sodium salts dissolved in 1-butyl-1-methylpyrrolidinium bis(trifluoromethylsulfonyl)imide (BMPTFSI) evaluated in a half-cell configuration using spherical P2-Na0.6Co0.1Mn0.9O2+z (NCO) cathodes are reported. Among the various electrolytes investigated, sodium bis(fluorosulfonyl)imide (NaFSI) (0.5 M) in BMPTFSI shows the best electrochemical performance with a significant improvement in cycling stability (90% capacity retention after 500 cycles at 50 mA g–1 in a half cell versus Na metal anode) compared with conventional NaClO4 (1 M) in ethylene carbonate/propylene carbonate electrolytes (39% retention after 500 cycles). Cyclic voltammetry (CV) studies reveal that ionic liquid electrolytes are stable up to 4.8 V versus Na/Na+. When NaFSI and NaTFSI are used as conducting salts, X-ray photoelectron spectroscopy results prove that the cathode electrolyte interface (CEI) is composed of components resulting from the decomposition of the TFSI anion and the deposition of the BMP cation. On the other hand, the CEI layer of the electrode cycled in an electrolyte containing NaClO4 in BMPTFSI follows a different pathway of TFSI decomposition and consists mainly of sodium fluoride. Similarly, plating studies were used to understand the stability of different ionic liquids in contact with metallic sodium. It was found that the excellent capacity retention for the electrolyte consisting of NaFSI salt is related to the formation of a stable CEI and solid electrolyte interphase layers. |
| first_indexed | 2024-10-01T06:13:46Z |
| format | Journal Article |
| id | ntu-10356/140730 |
| institution | Nanyang Technological University |
| language | English |
| last_indexed | 2024-10-01T06:13:46Z |
| publishDate | 2020 |
| record_format | dspace |
| spelling | ntu-10356/1407302023-07-14T15:56:39Z Effect of conducting salts in ionic liquid electrolytes for enhanced cyclability of sodium-ion batteries Do, Minh Phuong Bucher, Nicolas Nagasubramanian, Arun Markovits, Iulius Tian, Bingbing Fischer, Pauline J. Loh, Kian Ping Kühn, Fritz E. Srinivasan, Madhavi School of Materials Science and Engineering Engineering::Materials Ionic Liquid Sodium Ion Battery The electrochemical performance of ionic liquid electrolytes containing different sodium salts dissolved in 1-butyl-1-methylpyrrolidinium bis(trifluoromethylsulfonyl)imide (BMPTFSI) evaluated in a half-cell configuration using spherical P2-Na0.6Co0.1Mn0.9O2+z (NCO) cathodes are reported. Among the various electrolytes investigated, sodium bis(fluorosulfonyl)imide (NaFSI) (0.5 M) in BMPTFSI shows the best electrochemical performance with a significant improvement in cycling stability (90% capacity retention after 500 cycles at 50 mA g–1 in a half cell versus Na metal anode) compared with conventional NaClO4 (1 M) in ethylene carbonate/propylene carbonate electrolytes (39% retention after 500 cycles). Cyclic voltammetry (CV) studies reveal that ionic liquid electrolytes are stable up to 4.8 V versus Na/Na+. When NaFSI and NaTFSI are used as conducting salts, X-ray photoelectron spectroscopy results prove that the cathode electrolyte interface (CEI) is composed of components resulting from the decomposition of the TFSI anion and the deposition of the BMP cation. On the other hand, the CEI layer of the electrode cycled in an electrolyte containing NaClO4 in BMPTFSI follows a different pathway of TFSI decomposition and consists mainly of sodium fluoride. Similarly, plating studies were used to understand the stability of different ionic liquids in contact with metallic sodium. It was found that the excellent capacity retention for the electrolyte consisting of NaFSI salt is related to the formation of a stable CEI and solid electrolyte interphase layers. NRF (Natl Research Foundation, S’pore) Accepted version 2020-06-01T11:22:19Z 2020-06-01T11:22:19Z 2019 Journal Article Do, M. P., Bucher, N., Nagasubramanian, A., Markovits, I., Tian, B., Fischer, P. J., . . . Srinivasan, M. (2019). Effect of conducting salts in ionic liquid electrolytes for enhanced cyclability of sodium-ion batteries. ACS Applied Materials & Interfaces, 11(27), 23972-23981. doi:10.1021/acsami.9b03279 1944-8244 https://hdl.handle.net/10356/140730 10.1021/acsami.9b03279 31251014 2-s2.0-85069624499 27 11 23972 23981 en NRF2016NRF-NRF1001-22 ACS Applied Materials & Interfaces This document is the Accepted Manuscript version of a Published Work that appeared in final form in ACS Applied Materials & Interfaces, copyright © American Chemical Society after peer review and technical editing by the publisher. To access the final edited and published work see https://doi.org/10.1021/acsami.9b03279 application/pdf |
| spellingShingle | Engineering::Materials Ionic Liquid Sodium Ion Battery Do, Minh Phuong Bucher, Nicolas Nagasubramanian, Arun Markovits, Iulius Tian, Bingbing Fischer, Pauline J. Loh, Kian Ping Kühn, Fritz E. Srinivasan, Madhavi Effect of conducting salts in ionic liquid electrolytes for enhanced cyclability of sodium-ion batteries |
| title | Effect of conducting salts in ionic liquid electrolytes for enhanced cyclability of sodium-ion batteries |
| title_full | Effect of conducting salts in ionic liquid electrolytes for enhanced cyclability of sodium-ion batteries |
| title_fullStr | Effect of conducting salts in ionic liquid electrolytes for enhanced cyclability of sodium-ion batteries |
| title_full_unstemmed | Effect of conducting salts in ionic liquid electrolytes for enhanced cyclability of sodium-ion batteries |
| title_short | Effect of conducting salts in ionic liquid electrolytes for enhanced cyclability of sodium-ion batteries |
| title_sort | effect of conducting salts in ionic liquid electrolytes for enhanced cyclability of sodium ion batteries |
| topic | Engineering::Materials Ionic Liquid Sodium Ion Battery |
| url | https://hdl.handle.net/10356/140730 |
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