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Plating and Stripping of Calcium in an Alkyl Carbonate Electrolyte at Room Temperature

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journal contribution
posted on 31.10.2019, 19:04 by Saeid Biria, Shreyas Pathreeker, Hansheng Li, Ian D. Hosein
We report the plating and stripping of calcium metal at room temperature in a mixture of ethylene carbonate (EC) and propylene carbonate (PC) solvents using calcium tetrafluoroborate (Ca­(BF4)2) as the salt. Calcium is reversibly deposited and removed over several cycles, with associated plating–stripping efficiencies of >95%. Thin layers (∼20 μm) of crystalline calcium are present as the deposits, with a stable solid electrolyte interface (SEI) forming. This work opens opportunities to realize redox active Ca metal electrodes using commercially available alkyl carbonate solvents.