Ethyl 2‐(2‐fluoroethoxy)ethyl carbonate as a new electrolyte additive for high‐voltage Li‐metal batteries
Abstract The combination of a high‐Ni LiNixMnyCo1−x−yO2 (NMC) cathode and Li metal anode is currently considered the most promising candidate for high‐energy‐density Li‐metal batteries. However, undesired parasitic reactions in LiPF6‐based carbonate electrolytes hinder their further application. Her...
| Main Authors: | , , , , , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
Wiley
2023-01-01
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| Series: | Battery Energy |
| Subjects: | |
| Online Access: | https://doi.org/10.1002/bte2.20220034 |
| _version_ | 1797949052890906624 |
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| author | Dahee Jin Changhee Park Jiwon Han Cyril B. Dzakpasu Eunsae Kim Jimin Oh Kwang Man Kim Sunggi Lee Yong Min Lee |
| author_facet | Dahee Jin Changhee Park Jiwon Han Cyril B. Dzakpasu Eunsae Kim Jimin Oh Kwang Man Kim Sunggi Lee Yong Min Lee |
| author_sort | Dahee Jin |
| collection | DOAJ |
| description | Abstract The combination of a high‐Ni LiNixMnyCo1−x−yO2 (NMC) cathode and Li metal anode is currently considered the most promising candidate for high‐energy‐density Li‐metal batteries. However, undesired parasitic reactions in LiPF6‐based carbonate electrolytes hinder their further application. Herein, we report a new fluorinated linear carbonate additive, ethyl 2‐(2‐fluoroethoxy)ethyl carbonate) (EFEEC), to a lithium bis(trifluoromethanesulfonyl) imide–lithium bis(oxalate)borate‐based dual‐salt electrolyte system which is compatible with high‐Ni NMC and Li metal electrodes. We showed that in our electrolyte with well‐controlled lowest unoccupied molecular orbital/highest unoccupied molecular orbital levels, robust and stable solid electrolyte interphases are formed on both the cathode and anode synergistically, which enables neat and dense lithium metal deposition as well as the structural stability of NMC622 operated under a 4.5 V cut‐off voltage. The use of the dual‐salt‐based electrolyte with the EFEEC additive improved cycle performance with high‐capacity retention (76.0% at 200 cycles) even when operated under high voltage. |
| first_indexed | 2024-04-10T21:53:14Z |
| format | Article |
| id | doaj.art-400b145a9b3347c5ae3acc4c2b7a36dc |
| institution | Directory Open Access Journal |
| issn | 2768-1696 |
| language | English |
| last_indexed | 2024-04-10T21:53:14Z |
| publishDate | 2023-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | Battery Energy |
| spelling | doaj.art-400b145a9b3347c5ae3acc4c2b7a36dc2023-01-18T11:27:03ZengWileyBattery Energy2768-16962023-01-0121n/an/a10.1002/bte2.20220034Ethyl 2‐(2‐fluoroethoxy)ethyl carbonate as a new electrolyte additive for high‐voltage Li‐metal batteriesDahee Jin0Changhee Park1Jiwon Han2Cyril B. Dzakpasu3Eunsae Kim4Jimin Oh5Kwang Man Kim6Sunggi Lee7Yong Min Lee8Department of Energy Science and Engineering Daegu Gyeongbuk Institute of Science and Technology (DGIST) Daegu Republic of KoreaDepartment of Physics and Chemistry Daegu Gyeongbuk Institute of Science and Technology (DGIST) Daegu Republic of KoreaDepartment of Energy Science and Engineering Daegu Gyeongbuk Institute of Science and Technology (DGIST) Daegu Republic of KoreaDepartment of Energy Science and Engineering Daegu Gyeongbuk Institute of Science and Technology (DGIST) Daegu Republic of KoreaDepartment of Energy Science and Engineering Daegu Gyeongbuk Institute of Science and Technology (DGIST) Daegu Republic of KoreaIntelligent Sensors Research Section Electronics and Telecommunications Research Institute (ETRI) Yuseong‐gu Daejeon South KoreaIntelligent Sensors Research Section Electronics and Telecommunications Research Institute (ETRI) Yuseong‐gu Daejeon South KoreaDepartment of Physics and Chemistry Daegu Gyeongbuk Institute of Science and Technology (DGIST) Daegu Republic of KoreaDepartment of Energy Science and Engineering Daegu Gyeongbuk Institute of Science and Technology (DGIST) Daegu Republic of KoreaAbstract The combination of a high‐Ni LiNixMnyCo1−x−yO2 (NMC) cathode and Li metal anode is currently considered the most promising candidate for high‐energy‐density Li‐metal batteries. However, undesired parasitic reactions in LiPF6‐based carbonate electrolytes hinder their further application. Herein, we report a new fluorinated linear carbonate additive, ethyl 2‐(2‐fluoroethoxy)ethyl carbonate) (EFEEC), to a lithium bis(trifluoromethanesulfonyl) imide–lithium bis(oxalate)borate‐based dual‐salt electrolyte system which is compatible with high‐Ni NMC and Li metal electrodes. We showed that in our electrolyte with well‐controlled lowest unoccupied molecular orbital/highest unoccupied molecular orbital levels, robust and stable solid electrolyte interphases are formed on both the cathode and anode synergistically, which enables neat and dense lithium metal deposition as well as the structural stability of NMC622 operated under a 4.5 V cut‐off voltage. The use of the dual‐salt‐based electrolyte with the EFEEC additive improved cycle performance with high‐capacity retention (76.0% at 200 cycles) even when operated under high voltage.https://doi.org/10.1002/bte2.20220034electrolyte additiveethyl 2‐(2‐fluoroethoxy)ethyl carbonatehigh‐voltage operationLi‐metal secondary batteriessolid electrolyte interphase |
| spellingShingle | Dahee Jin Changhee Park Jiwon Han Cyril B. Dzakpasu Eunsae Kim Jimin Oh Kwang Man Kim Sunggi Lee Yong Min Lee Ethyl 2‐(2‐fluoroethoxy)ethyl carbonate as a new electrolyte additive for high‐voltage Li‐metal batteries Battery Energy electrolyte additive ethyl 2‐(2‐fluoroethoxy)ethyl carbonate high‐voltage operation Li‐metal secondary batteries solid electrolyte interphase |
| title | Ethyl 2‐(2‐fluoroethoxy)ethyl carbonate as a new electrolyte additive for high‐voltage Li‐metal batteries |
| title_full | Ethyl 2‐(2‐fluoroethoxy)ethyl carbonate as a new electrolyte additive for high‐voltage Li‐metal batteries |
| title_fullStr | Ethyl 2‐(2‐fluoroethoxy)ethyl carbonate as a new electrolyte additive for high‐voltage Li‐metal batteries |
| title_full_unstemmed | Ethyl 2‐(2‐fluoroethoxy)ethyl carbonate as a new electrolyte additive for high‐voltage Li‐metal batteries |
| title_short | Ethyl 2‐(2‐fluoroethoxy)ethyl carbonate as a new electrolyte additive for high‐voltage Li‐metal batteries |
| title_sort | ethyl 2 2 fluoroethoxy ethyl carbonate as a new electrolyte additive for high voltage li metal batteries |
| topic | electrolyte additive ethyl 2‐(2‐fluoroethoxy)ethyl carbonate high‐voltage operation Li‐metal secondary batteries solid electrolyte interphase |
| url | https://doi.org/10.1002/bte2.20220034 |
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