SOLID-STATE CATHODE MATERIALS FOR LITHIUM BATTERIES - EFFECT OF SYNTHESIS TEMPERATURE ON THE PHYSICAL AND ELECTROCHEMICAL PROPERTIES OF SILVER VANADIUM-OXIDE
Ra. Leising et Es. Takeuchi, SOLID-STATE CATHODE MATERIALS FOR LITHIUM BATTERIES - EFFECT OF SYNTHESIS TEMPERATURE ON THE PHYSICAL AND ELECTROCHEMICAL PROPERTIES OF SILVER VANADIUM-OXIDE, Chemistry of materials, 5(5), 1993, pp. 738-742
Silver vanadium oxide (SVO, AgV2O5.5) was synthesized for use as a cat
hode material in lithium/SVO batteries. The material was prepared via
a solid-state thermal reaction of silver nitrate and vanadium pentoxid
e in the presence of air. The surface morphology of the final product
was found to be dependent on the temperature of synthesis of the mater
ial, as evidenced by SEM analysis of the samples. SVO synthesized at 3
20 and 375-degrees-C displayed irregularly shaped particles, while mat
erial prepared at 450-degrees-C was needlelike. SVO synthesized at 540
-degrees-C appeared to be a mixture of large crystalline plates and ir
regular particles. All of the samples were analyzed by DSC, chemical a
nalysis, X-ray powder diffraction, resistivity measurements, and const
ant-resistance discharge of Li/SVO test cells. The experimental capaci
ties of the lower temperature materials (320, 375-degrees-C) were simi
lar to that found for SVO prepared at 450-degrees-C. A significant dec
rease in delivered capacity was noted when the SVO prepared at 540-deg
rees-C was used as a cathode material.