B. Wang, Y. Wu, S. Zhuo, S. Zhu, Y. Chen, C. Jiang, C. Wang*, Synergistic effect of organic plasticizer and lepidolite filler on polymer electrolytes for all-solid high-voltage Li-metal batteries. J. Mater. Chem. A 2020, DOI: 10.1039/C9TA14239H

Abstract:  Composite polymer electrolytes (CPEs) can combine the advantages of both solid polymer electrolytes (SPEs) and inorganic solid electrolytes, and thereby have drawn a lot of attention due to the large demand of batteries with high energy density and safety. Among them, PEO is the most popular polymer as the matrix of CPEs, which, however, has a lot of shortages. PVDF can be considered as a potential matrix with wide electrochemical window, flame retardance and high thermal stability, which, on the other hand, always showed low ionic conductivity. Herein, we reported the PVDF-based CPEs, showing high ionic conductivity of 0.125 mS cm^-1 at room temperature and 1 mS cm^-1 at 120 °C, wide electrochemical window and marvelous fire resistance. The high ionic conductivity can be attributed to the synergistic effect of DMF plasticizer and 2D lepidolite filler. The PVDF-based CPEs therefore showed great potential in all-solid Li-metal batteries with high voltage output, high capacity, satisfactory rate capability and excellent electrochemical stability.