“…However, there are rare studies concerning solid state electrolytes based on clay materials [4]- [8], such as: poly(vinylidene fluoride-hexafluoropropylene)/organo-montmorillonite nanocomposite as a polymer electrolyte [4], poly(ethylene oxide)/intercalated clay as a polymer electrolyte [5], organophilic vermiculite/poly(methylmethacrylate)/1-butyl-3-methylimidazolium hexafluorophosphate composite as a gel polymer electrolyte [6], poly(vinylidene fluoride) based nanocomposite porous polymer as a polymer electrolyte in lithium ion batteries [7] and poly(vinylidene fluoride)-clay nanocomposite as a gel polymer electrolyte for Li-ion batteries [8], etc. Otherwise, applications of kaolin-type clay in electronic devices have not been reported.…”