Abstract
A thin film solid-state lithium secondary cell, Li/Li3.6Si0.6P0.4O4/TiS2, has been studied and cell performance evaluated. The electrolyte thin film developed was amorphous, ionic conductivity was 5×10−6 (ohm cm)−1 and its Li+ transference number was 1.0. The cathode film was composed of small and narrow plate-like TiS2 crystals intersecting each other, and had a preferred orientation of the crystallographic c-axis parallel to the substrate plane. The apparent chemical diffusion coefficient of Li+ in TiS2 film was 1.1×10−11 cm2/s. The open circuit voltage of the cell was about 2.5 V, and the short circuit current was 1.3 mA/cm2. It was also demonstrated that the cell was discharged about 2000 times.
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