Electrochemical Performance of Oligo(EDOT)/crosslinked PVA/SiO<sub>2</sub> Composite based Solid Polymer Electrolyte
발표자
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초록
내용
Currently, lithium secondary batteries are being used as energy source for electric vehicles and energy storage systems. However, the characteristics of lithium secondary batteries currently being commercialized do not fully satisfy the requirements for high energy density and safety. In order to meet these requirements. To commercialize a solid electrolyte, it is an important task to compensate the low ionic conductivity and high interfacial resistance with electrodes compared to organic liquid electrolytes. In this study, oligo(3,4-ethylenedioxythiophene) (oligo(EDOT)) was added to poly(vinyl alcohol) (PVA), a polymer matrix with high ionic conductivity and good adhesion to electrodes due to its sticky property. It lowers the interfacial resistance with the polythiophene (PTh)-based electrode. By adding a porous silicon dioxide (SiO2) filler, the lithium salt dissociation ability was increased. In addition, the composite electrolyte was supplemented through crosslinking to improve charge/discharge characteristics.