CaF2 solid‐state electrolytes prepared by vapor pressure exposure and solid synthesis for defect and ionic conductivity tuning. Issue 1 (23rd July 2019)

• Record Type: Journal Article
• Authors: Molaiyan, Palanivel; Witter, Raiker
• Is Part Of: Material design & processing communications. Volume 2:Issue 1(2020)
• Page Start: n/a
• Page End: n/a
• Publication Date: 2019-07-23
• Subjects: CaF2 -- solid‐state electrolyte -- ionic conductivity -- humidity treatment -- vapor pressure treatment -- high‐energy ball‐milling; Materials -- Research -- Periodicals; Materials -- Design -- Periodicals; Materials -- Research; Materials -- Design; Electronic journals; Periodicals; 620.11
• DOI: 10.1002/mdp2.76
• Languages: English
• ISSNs: 2577-5476

Abstract

Abstract: CaF2 nano‐crystalline materials were synthesized by applying vapor pressure (RH 74 %) treatment and high‐energy ball‐milling. The resulting fluoride electrolytes were examined by X‐ray diffraction (XRD), Scanning Electron Microscopy (SEM) and Nuclear Magnetic Resonance (NMR) studies revealing cubic structure with a crystallite size of 13 nm of particles with a typical size of 65 nm. The ionic conductivity was observed by Electrochemical Impedance Spectroscopy (EIS) which provided a maximum of 4.6·10 −6 S·cm −1 at room temperature. Comparing with previous results obtained at higher relative humidity, this parameter can be used for tuning defects and ionic conductivity providing a path to optimize conditions for electrochemical applications.