Abstract
Significant ultraviolet (UV) technology was used to create a new composite polymer electrolyte (CPE) membrane composed of poly (vinylidene fluoride-hexafluoropropylene) (PVDF-HFP), benzophenone (Bp), and varying amounts of highly ion-conducting Li6.4La3Zr1.4Ta0.6O12 (LLZTO) particles. In lithium metal batteries, the CPE membranes demonstrated improved mechanical properties as well as superior electrochemical performances. CPE-15wt% LLZTO typically demonstrated the highest ionic conductivity (σ = 3.7 × 10−3 S/cm) at room temperature, a high Li-transference (t+ = 0.79), and a wider electrochemical stability window (ESW) above 5 V, as well as good mechanical strength (8.2 MPa). More importantly, the CPE-15wt% LLZTO membrane inhibits Li dendrite expansion in Li symmetric cells and exhibits long-term cyclic stability with a current density of 3 mA/cm2 over 1150 h for Li/CPE-15wt% LLZTO/Li. The current study demonstrates that a UV-irradiated CPE membrane can be a promising electrolyte for next-generation lithium-metallic batteries.
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Gu, Y., Liu, H. PVDF-HFP/LLZTO composite electrolytes with UV cure for solid-state lithium rechargeable batteries. J Solid State Electrochem 27, 2671–2679 (2023). https://doi.org/10.1007/s10008-023-05570-2
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DOI: https://doi.org/10.1007/s10008-023-05570-2