Characterization of LiClO₄-SiO₂ Composite Electrolyte Prepared by Modified Sol-Gel Method

Abstract:

(100-x) LiClO_4-xSiO₂ (x is mol %) solid composite electrolytes in various compositions were synthesized by modified sol-gel process with sintering at 200 °C. The electrical and structural properties of the composites were investigated. The ionic conductivity of the composites increased with mol % of the dispersoid and then decreased. The highest conductivity was obtained for x = 50 mol % with a value of 4.06 × 10^-7 S cm^-1 at room temperature. The enhancement in conductivity was more than two orders of magnitude when compared to the host material. The higher conductivity in the SiO₂ dispersed system was interpreted in terms of space charge layer and percolation theory. The temperature dependence of conductivity of all samples were Arrhenian in nature and exhibited a maximum of 10^-3 S cm^-1 at T = 140 °C for x = 50 mol %. XRD spectra showed presence of heterogeneous phase of LiClO₄-SiO₂ crystalline peaks.

• Periodical: Advanced Materials Research (Volumes 415-417)
• Pages: 442-445
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.415-417.442
• Online since: December 2011
• Authors: Hafizul Mat, Mohamed Nor Sabirin, Ri Hanum Yahaya Subban
• Keywords: Composite, LiClO₄, SiO₂, Solid Composite

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