Microporous poly(vinylidene fluoride - trifluoroethylene) / zeolite membranes for lithium-ion battery applications

摘要

Membrane technology are at the base of several technologies including filtration, sensing and energy applications [1]. For lithium-ion battery application, the electrochemical cell is constituted by the cathode, anode and a separator membrane. In this application, the separator membrane is usually called solid polymer electrolyte (SPE) [2, 3]. The main parameters determining the performance of SPE are thickness, permeability, porosity/pore size, wettability, electrolyte absorption and retention, chemical, dimensional and thermal stability [4, 5]. For the SPE, the lithium salt is placed in the membrane through incorporation of an electrolyte solution or directly in the membrane in the form of composite [6, 7]. Large advances in SPE technologies are obtained by the incorporation of suitable fillers into the host polymer for improving mechanical strength, thermal stability and ionic conductivities [8]. Among these fillers are oxide ceramic, zeolites, ferroelectric material, carbon, etc [9].