“Widespread energy storage for the grid will require batteries with low cost and high safety. Intercalation cathodes are typically limited to the transfer of only one electron per transition metal atom or less, negatively impacting cost and energy density. In this work, we report on the rechargeable alkaline MnO2 cathode, which cycles reversibly from the Mn(IV) to Mn(II) state, providing two electrons of capacity per Mn atom.”

Find the paper and full list of authors in Joule.