Review on the Physicl Properties of Polyethylene Oxide

Abstract

Solid polymeric electrolytes have become crucial today due to their stability and high conductivity. Recently, lithium ion-doped polymeric electrolytes have gained intense attention for their superior ability to create highly conductive electrolytes for batteries and energy storage. This innovative electrolyte type has displaced many traditional systems due to their flammability and bulkiness. Traditional liquid organic electrolytes pose risks due to their flammable and unstable nature. Solid-state composite electrolytes offer both mechanical stability and electrical conductivity by using solid polymeric matrices like polyethylene oxide and polyurethane reinforced with inert fillers like alumina and titanium dioxide. Polyethylene oxide (PEO)-based materials show promise as polymer hosts for high-energy-density lithium batteries due to their safety, cost-effectiveness, and compatibility with lithium salt. However, the linear PEO's insufficient ionic conductivity, stemming from high crystallinity in ethylene oxide chains, limits production at low temperatures. This review delves into lithium salt effects, matrix types, plasticizer and filler impact, and composite electrolyte mechanisms.