Ordered LiNi0.5Mn1.5O4 cathode in bis(fluorosulfonyl)imide-based ionic liquid electrolyte: importance of the cathode–electrolyte interphase
The high-voltage (4.7 V vs Li+/Li) spinel lithium nickel manganese oxide (LiNi0.5Mn1.5O4, LNMO) is a promising candidate for the next generation of lithium-ion batteries due to its high energy density, low cost, and low environmental impact. However, poor cycling performance at high cutoff potential...
| Main Authors: | , , , , , , , |
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| Format: | Journal article |
| Language: | English |
| Published: |
American Chemical Society
2021
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| _version_ | 1826281274056114176 |
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| author | Lee, HJ Brown, Z Zhao, Y Fawdon, J Song, W Lee, JH Ihli, J Pasta, M |
| author_facet | Lee, HJ Brown, Z Zhao, Y Fawdon, J Song, W Lee, JH Ihli, J Pasta, M |
| author_sort | Lee, HJ |
| collection | OXFORD |
| description | The high-voltage (4.7 V vs Li+/Li) spinel lithium nickel manganese oxide (LiNi0.5Mn1.5O4, LNMO) is a promising candidate for the next generation of lithium-ion batteries due to its high energy density, low cost, and low environmental impact. However, poor cycling performance at high cutoff potentials limits its commercialization. Herein, hollow-structured LNMO is synergistically paired with an ionic liquid electrolyte, 1 M lithium bis(fluorosulfonyl)imide (LiFSI) in N-propyl-N-methylpyrrolidinium bis(fluorosulfonyl)imide (Pyr1,3FSI), to achieve stable cycling performance and improve the rate capability. The optimized cathode–electrolyte system exhibits extended cycling performance (>85% capacity retention after 300 cycles) and high rate performance (106.2 mAh g–1 at 5C) even at an elevated temperature of 65 °C. X-ray photoelectron spectroscopy and spatially resolved X-ray fluorescence analyses confirm the formation of a robust, LiF-rich cathode–electrolyte interphase. This study presents a comprehensive design strategy to improve the electrochemical performance of high-voltage cathode materials. |
| first_indexed | 2024-03-07T00:26:20Z |
| format | Journal article |
| id | oxford-uuid:7e43b890-4d35-4909-8dbe-785cbbb72f34 |
| institution | University of Oxford |
| language | English |
| last_indexed | 2024-03-07T00:26:20Z |
| publishDate | 2021 |
| publisher | American Chemical Society |
| record_format | dspace |
| spelling | oxford-uuid:7e43b890-4d35-4909-8dbe-785cbbb72f342022-03-26T21:09:11ZOrdered LiNi0.5Mn1.5O4 cathode in bis(fluorosulfonyl)imide-based ionic liquid electrolyte: importance of the cathode–electrolyte interphaseJournal articlehttp://purl.org/coar/resource_type/c_dcae04bcuuid:7e43b890-4d35-4909-8dbe-785cbbb72f34EnglishSymplectic ElementsAmerican Chemical Society 2021Lee, HJBrown, ZZhao, YFawdon, JSong, WLee, JHIhli, JPasta, MThe high-voltage (4.7 V vs Li+/Li) spinel lithium nickel manganese oxide (LiNi0.5Mn1.5O4, LNMO) is a promising candidate for the next generation of lithium-ion batteries due to its high energy density, low cost, and low environmental impact. However, poor cycling performance at high cutoff potentials limits its commercialization. Herein, hollow-structured LNMO is synergistically paired with an ionic liquid electrolyte, 1 M lithium bis(fluorosulfonyl)imide (LiFSI) in N-propyl-N-methylpyrrolidinium bis(fluorosulfonyl)imide (Pyr1,3FSI), to achieve stable cycling performance and improve the rate capability. The optimized cathode–electrolyte system exhibits extended cycling performance (>85% capacity retention after 300 cycles) and high rate performance (106.2 mAh g–1 at 5C) even at an elevated temperature of 65 °C. X-ray photoelectron spectroscopy and spatially resolved X-ray fluorescence analyses confirm the formation of a robust, LiF-rich cathode–electrolyte interphase. This study presents a comprehensive design strategy to improve the electrochemical performance of high-voltage cathode materials. |
| spellingShingle | Lee, HJ Brown, Z Zhao, Y Fawdon, J Song, W Lee, JH Ihli, J Pasta, M Ordered LiNi0.5Mn1.5O4 cathode in bis(fluorosulfonyl)imide-based ionic liquid electrolyte: importance of the cathode–electrolyte interphase |
| title | Ordered LiNi0.5Mn1.5O4 cathode in bis(fluorosulfonyl)imide-based ionic liquid electrolyte: importance of the cathode–electrolyte interphase |
| title_full | Ordered LiNi0.5Mn1.5O4 cathode in bis(fluorosulfonyl)imide-based ionic liquid electrolyte: importance of the cathode–electrolyte interphase |
| title_fullStr | Ordered LiNi0.5Mn1.5O4 cathode in bis(fluorosulfonyl)imide-based ionic liquid electrolyte: importance of the cathode–electrolyte interphase |
| title_full_unstemmed | Ordered LiNi0.5Mn1.5O4 cathode in bis(fluorosulfonyl)imide-based ionic liquid electrolyte: importance of the cathode–electrolyte interphase |
| title_short | Ordered LiNi0.5Mn1.5O4 cathode in bis(fluorosulfonyl)imide-based ionic liquid electrolyte: importance of the cathode–electrolyte interphase |
| title_sort | ordered lini0 5mn1 5o4 cathode in bis fluorosulfonyl imide based ionic liquid electrolyte importance of the cathode electrolyte interphase |
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