Fig. 6: Thin-film solid-state battery with an ultrathin aLLZO electrolyte.

a Cross-section SEM image of the battery stack. b Charge–discharge curves at different C rates (1C = 22 µA cm−2). c Discharge capacity and Coulombic efficiency of the battery at different C rates. d Long-term cycling of the battery over 500 cycles at 10C (0.2 mA cm−2).