Preparation of <TEX>$Li_2O-ZrO_2-P_2O_5-SiO_2$</TEX> based Glassy Solid Electrolytes by Sol-Gel Process and Their Ionic Conduction

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J. Korean Ceram. Soc. > Volume 31(6); 1994 > Article

Journal of the Korean Ceramic Society 1994;31(6): 660.

솔-젤법에 의한 $Li_2O-ZrO_2-P_2O_5-SiO_2$계 유리 고체전해질의 제조와 그의 이온전도성

박강석, 김기원¹, 강은태

경상대학교 무기재료공학과
¹경상대학교 금속재료공학과

Preparation of $Li_2O-ZrO_2-P_2O_5-SiO_2$ based Glassy Solid Electrolytes by Sol-Gel Process and Their Ionic Conduction

ABSTRACT

Transparent, crack-free dried gel monoliths with a composition of LiZr1.5Si2P2O12.5 have been synthesized by the low temperature polymerization of the Sol-Gel technique using metal alkoxides as starting materials. After initial reaction (20~40 min), each metal alkoxide closely paralleled each other during the hydrolysis reactions. The safe drying conditions of gels with no creaks the control of the shrinkage rate. The gels converted into the glass by heat treatment at 75$0^{circ}C$. FTIR data indicated that the gels were phase separated into silicarich and phosphate-rich regions with the lithium. XRD results showed the formation of crystalline LiH2PO4. The gels dried at 15$0^{circ}C$ or fired at 75$0^{circ}C$ contained the residual water. The high ionic conductivity at room temperature for these gels was attributed to the motion of protons.