Ion Transport and Polymeric Battery Studies on Hot-pressed Solid Polymer Electrolytes: (1-x) PEO: x KHCO3

摘要

Preparation and characterization of an ion conducting solid polymer electrolyte (SPE) membranes: (1-x) PEO: x KHCO3, where x = 0 < x < 50 wt. (%), are reported. SPE membranes were casted using a recently developed hot-press technique. The composition: 70PEO: 30KHCO3 with conductivity (σ) ～ 8.5 x 10~(-7) S.cm~(-1) was identified as highest conducting composition from the compositional dependent conductivity study and this has been referred to as the Optimum Conducting Composition (OCC). An enhancement in the room temperature conductivity of approximately two orders Of magnitude has been achieved in OCC as compared to pure polymer host PEO. Material characterizations were done with the help of XRD, Scanning Electron Micrograph (SEM) and TGA analysis. The basic ionic transport parameters viz. ionic conductivity ( σ), ionic mobility (μ), mobile ion concentration (n) and ionic transference number (t_(ion)) have been characterized using different experimental techniques. A solid-state polymeric batteries were fabricate using SPE OCC as an electrolyte and the cell-potential discharge characteristics were also studied at different load conditions at room temperature.