期刊
JOURNAL OF ELECTROANALYTICAL CHEMISTRY
卷 905, 期 -, 页码 -出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.jelechem.2021.115900
关键词
Lithium metal batteries; Carbonate molecule; Cycleability; Surface modification, electrolyte
资金
- National Research Foundation of Korea (NRF) - Korea government (MEST) [NRF2018M1A2A2063353]
- Ministry of Trade, Industry&Energy/Korea Evaluation Institute of Industrial Technology (MOTIE/KEIT) [20014638]
- Korea Evaluation Institute of Industrial Technology (KEIT) [20014638] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
The highly fluorinated carbonate molecule-based electrolyte DFDEC enhances the electrochemical performance of lithium metal batteries by forming a stable protective bilayer on the Li surface, leading to prolonged stable electroplating/stripping of Li metal and enhanced cycle performance.
A highly fluorinated carbonate molecule-based electrolyte is introduced to enhance the electrochemical performance of lithium metal batteries. The applied bis(2, 2, 2-trifluoroethyl) carbonate (DFDEC) demonstrates impressive performance enhancement by stable oligomeric/LiF-based bi-layered surface modification of Li metal. Li symmetric cell cycling shows prolonged stable electroplating/stripping of Li metal because of the formation of a stable protective bilayer on the Li surface. Furthermore, the negatively shifted HOMO energy level of DFDEC enhances the anodic stability in the high-voltage region on the high-nickel-containing positive electrode surface. Both sophisticated electrochemical characteristics of the DFDEC lead to the enhanced cycle performance of the lithium metal cell.
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