Inorganic/organic composite fluorinated interphase layers for stabilizing ether-based electrolyte in high-voltage lithium metal batteries
Literature Information
Qimeng Ren, Qinglei Wang, Li Su, Guodong Liu, Yan Song, Xuehui Shangguan, Faqiang Li
Despite their superior reduction stability to Li metal compared with conventional carbonate electrolytes, ethers have been precluded from use in high-voltage batteries due to their limited oxidation stability (<4 V). Herein, this issue can be effectively addressed by the synergistic effect strategy based on dual salt and fluoroethylene carbonate (FEC) as a co-solvent, which forms a unique Li+ solvation structure with aggregated dual anions and induces more robust inorganic/organic composite fluorinated interphase layers. It is noted that this ether-based electrolyte presents an enlarged electrochemical window up to 4.6 V resulting from the enhanced oxidative stability by introducing FEC. Meanwhile, the interphase layers effectively improve the Li plating/stripping kinetics and interface stability. Besides, in situ FTIR, Raman spectra and theoretical calculations are used to confirm the solvation interactions. And the inorganic/organic composite fluorinated interphase layer component is verified by X-ray photoelectron spectroscopy (XPS) spectra. Using this ether-based electrolyte, the Li/Cu cells present colossal Li deposits with a high coulombic efficiency (≈98.95%). More significantly, the 4.4 V Li/LiCoO2 battery exhibits excellent cycling stability with a capacity retention of 80% over 300 cycles. This work offers a promising approach to enable ether-based electrolytes for high-voltage Li metal batteries (LMBs).
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Journal of Materials Chemistry A, B & C cover high quality studies across all fields of materials chemistry. The journals focus on those theoretical or experimental studies that report new understanding, applications, properties and synthesis of materials. The journals have a strong history of publishing quality reports of interest to interdisciplinary communities and providing an efficient and rigorous service through peer review and publication. The journals are led by an international team of Editors-in-Chief and Associate Editors who are all active researchers in their fields. Journal of Materials Chemistry A, B & C are separated by the intended application of the material studied. Broadly, applications in energy and sustainability are of interest to Journal of Materials Chemistry A, applications in biology and medicine are of interest to Journal of Materials Chemistry B, and applications in optical, magnetic and electronic devices are of interest to Journal of Materials Chemistry C. More than one Journal of Materials Chemistry journal may be suitable for certain fields and researchers are encouraged to submit their paper to the journal that they feel best fits for their particular article. Example topic areas within the scope of Journal of Materials Chemistry A are listed below. This list is neither exhaustive nor exclusive. Artificial photosynthesis Batteries Carbon dioxide conversion Catalysis Fuel cells Gas capture/separation/storage Green/sustainable materials Hydrogen generation Hydrogen storage Photocatalysis Photovoltaics Self-cleaning materials Self-healing materials Sensors Supercapacitors Thermoelectrics Water splitting Water treatment











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