Poly(vinylidene fluoride hexafluoropropylene) polymer electrolyte for paper based and flexible battery applications
Paper based batteries represent a new frontier in battery technology. However, low flexibility and poor ionic conductivity of solid electrolytes have been major impediments in achieving practical mechanically flexible batteries. This work discuss new highly ionic conductive polymer gel electrolytes for paper based battery applications. In this paper, we present a poly(vinylidene fluoride hexafluoropropylene) (PVDH HFP) porous membrane electrolyte enhanced with lithium bis(trifluoromethane sulphone)imide (LiTFSI) and lithium aluminum titanium phosphate (LATP) with an ionic conductivity of 2.1 x 10 3 S cm 1. Combining ceramic (LATP) with the gel structure of PVDF HFP and LiTFSI ionic liquid harnesses benefits of ceramic and gel electrolytes in providing flexible electrolytes with a high ionic conductivity. In a flexibility test experiment, bending the polymer electrolyte at 90deg for 20 times resulted in 14% decrease in ionic conductivity. Efforts to further improving the flexibility of the presented electro.