CHARACTERIZATION OF TIS2 COMPOSITE CATHODES WITH SOLID POLYMER ELECTROLYTE

A TiS2 composite cathode for Lithium polymer battery was developed. We investigated the a.c. impedance response as a function of temperature and charge/discharge cycling process and charge/discharge characteris tics of TiS2 composite/solid polymer electrolyte/Li cells. The passiva tion layer resistance of the Li/solid polymer electrolyte interface at 25 degrees C was 292 Omega cm(2). The total resistance of the TiS2 bu lk and the TiS2/solid polymer electrolyte interfaces was 96 Omega cm(2 ). The cell resistance significantly decreased at 60 degrees C. The di scharge capacity of the TiS2 composite cathode with 40 wt.% solid poly mer eletrolyte was 173 and 146 mAh/g based on TiS2 at cycle nos. 1 and 20 at 25 degrees C, respectively. The utilization TiS2 at the dischar ge processes nos. 1 and 20 at 25 degrees C were 72 and 61%, respective ly TIS2 composite cathode with 40 wt.4% solid polymer electrolyte show ed better capacity with cycling. (C) 1997 Published by Elsevier Scienc e S.A.