Rechargeable solid electrolyte cells with a copper ion conductor,Rb4Cu16I7−δCl13+δ, and a titanium disulphide cathode

A rechargeable solid electrolyte cell has been developed using a high copper-ion-conductivity solid electrolyte, Rb₄Cu₁₆I_7–Cl₁₃₊, a copper anode, and an intercalation cathode, TiS₂. The open-circuit voltage was 0.59 V at 25° C. The cell yielded a current of several tens of microamperes at room temperature without appreciable polarization. The cell could be submitted to one hundred or more charge-discharge cycles without showing appreciable deterioration.