Communication—Lithium Bis(fluorosulfonyl)imide (LiFSI) as a Promising Salt to Suppress Solid Electrolyte Interphase Degradation at Elevated Temperatures
| Autor: | Ji Heon Ryu, Seung M. Oh, Haebeen Kim, Jongjung Kim |
|---|---|
| Rok vydání: | 2020 |
| Předmět: |
Materials science
Renewable Energy Sustainability and the Environment 020209 energy Thermal decomposition chemistry.chemical_element 02 engineering and technology Electrolyte Lithium hexafluorophosphate Condensed Matter Physics Silicon monoxide Surfaces Coatings and Films Electronic Optical and Magnetic Materials chemistry.chemical_compound chemistry Chemical engineering 0202 electrical engineering electronic engineering information engineering Materials Chemistry Electrochemistry Interphase Thermal stability Phosphorus pentafluoride Lithium |
| Zdroj: | Journal of The Electrochemical Society. 167:080529 |
| ISSN: | 1945-7111 |
| DOI: | 10.1149/1945-7111/ab8fd5 |
| Popis: | This study demonstrates that lithium/silicon monoxide (SiO) cell degradation can be avoided when lithium bis(fluorosulfonyl)imide (LiFSI) is utilized as an electrolyte salt. In our previous work, the solid electrolyte interphase (SEI) was damaged at elevated temperatures by the attack of the Lewis acidic phosphorus pentafluoride (PF5), which is the thermal decomposition product of lithium hexafluorophosphate (LiPF6). This leads to growth of film thickness and cell polarization, causing severe cell failure. However, when LiPF6 is replaced with LiFSI, the SEI degradation is significantly suppressed, resulting in decreased cell polarization and improved cell performance, due to the high thermal stability of LiFSI. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|