Emerging calcium batteries
This review depicts the present landscape in the field of calcium batteries, presenting a critical analysis of the state-of-the-art and estimating performance indicators to foresee the development of this technology. The practical realization of rechargeable Ca batteries still relies on the identification of suitable electrode and electrolytes. Despite reversible calcium plating-stripping being recently demonstrated, efforts are still needed to improve kinetics and efficiency and to allow a wider range of electrolyte formulations.