Extended Data Fig. 7: Electrochemical performance of Ca metal anode in electrolytes with and without DMSO.
From: A rechargeable calcium–oxygen battery that operates at room temperature
a, Cyclic voltammogram of Ca plating/stripping in electrolyte with DMSO (EMIM-BF4/DMSO (50:50 vol%)). Scan rate, 100 mV/s. Inset, passed charge during plating/stripping from the cyclic voltammogram. b, Cyclic voltammogram of Ca plating/stripping in electrolyte without DMSO (EMIM-BF4). Scan rate, 100 mV/s. Inset, passed charge during plating/stripping. c, Cyclic voltammogram of Ca plating/stripping in electrolyte with DMSO (EMIM-BF4/DMSO (50:50 vol%)) in the presence of O2 shows similar reversibility compared with that without O2 (a). Scan rate, 100 mV/s. Inset, passed charge during plating/stripping from the cyclic voltammogram. d, Nyquist plots of the symmetric battery after the 1st, 50th, and 100th Ca plating/stripping cycles.
