The Rechargeable Li x TiS2 / LiAlCl4 / Li1 − x CoO2 Solid‐State Cell

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Abstract
An all solid‐state cell employing lithium tetrachloroaluminate as the lithium ion conducting solid electrolyte and using lithium intercalating compounds, titanium disulfide , and lithium cobalt (III) oxide , as the electroactive materials in the ldquo;rocking chair” configuration is described. Thin films of were prepared by chemical vapor deposition onto aluminum substrates while thin films of on aluminum were prepared by organometallic decomposition and used as the negative and positive electrodes, respectively. On charge, was delithiated and the lithium ions were transported through the solid electrolyte to the electrode where they were intercalated and formed lithiated titanium disulfide . On discharge, the electrode processes are reversed. The cell was operated at 100°C and exhibited an open‐circuit potential of 2.1 V in the charged state. The cell showed excellent discharge characteristics at current densities up to 0.1 mA/cm2 and also showed only a slight loss of capacity over one hundred charge‐discharge cycles.

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