Polymer-Ceramic Composite Gel Polymer Electrolyte for High-Electrochemical-Performance Lithium-Ion Batteries

Abstract

In this study, poly(vinylidene fluoride-co-hexafluoropropylene) (PVdF-HFP)-based gel polymer electrolyte incorporating nano-size Al2O3 ceramic particle was prepared by electrospinning. The gel polymer electrolyte (GPE) incorporated with Al2O3 ceramic particle showed higher ionic conductivity of 9.5x10(-2) S cm(-1) than pure PVdF-HFP GPE without ceramic particle and improved the electrochemical stability up to 5.2 V. The GPEs were assembled with LiNi1/3 Mn1/3Co1/3O2 (NMC) cathode for electrochemical test. The GPE batteries at 0.1 C-rate delivered 168.2 mAh g(-1) for pure GPE and 189.6 mAh g(-1) for hybrid GPE, respectively. Therefore, the incorporation of high dielectric constant ceramic particle will be good strategy to enhance the stability and electrochemical properties of lithium ion gel polymer batteries.