Effect of microstructure on the conductivity of a NASICON-type lithium ion conductor |
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| Authors: | Paul Johnson Nigel SammesNobuyuki Imanishi Yasuo TakedaOsamu Yamamoto |
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| Institution: | a Department of Metallurgical and Materials Engineering, Colorado School of Mines, 1500 Illinois St. Golden, Colorado 80401, USAb Department of Chemistry, Faculty of Engineering, Mie University, Tsu, Mie 514-8507, Japan |
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| Abstract: | Sintering temperature is used to control the microstructure of Li1 + x + yAlxTi2 − xSiyP3 − yO12 (x = 0.3, y = 0.2), a NASICON-type glass-ceramic. Scanning Electron Microscope imaging, X-Ray Diffraction, and Electrochemical Impedance Spectroscopy are employed to show that increase in sintering temperature increases conductivity while generating secondary crystalline phases. Total conductivity is as high as 3.81 × 10−4 S cm−1 for sintering temperatures above 1000 °C. Crystallization of dielectric phases places the optimal sintering temperature in the 900 °C to 1000 °C range. Thermal analysis of the glass precursor reveals the glass transition, and crystallization temperatures. |
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| Keywords: | Lithium Electrolyte Secondary battery Ionic conductivity |
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