THE THERMODYNAMIC AND THERMOELECTRIC PROPERTIES OF LIXTIS2 AND LIXCO02

The partial thermodynamic functions for Li//xTi//1//. //0//3S//2 (0. 13 less than equivalent to x less than equivalent to 0. 97) and Li//0//. //9//5CoO//2 were obtained from emf-temperature measurements (T equals minus 30-20 degree C). The electronic component of the thermoelectric power was determined. From the sign of the (electronic) Seebeck coefficient it followed that Li//xTi//1//. //0//3S//2 is a n-type and Li//xCoO//2 a p-type electronic conductor. The influence of the amount of inserted lithium and temperature dependence on the Seebeck coefficient is discussed. A new method to determine the ionic heat of transport directly from the ionic Seebeck coefficient was developed. Also the thermodynamic, thermoelectric and kinetic data of Li//xTi//1//. //0//3S//2 are compared with those of Ag//xTiS//2.