Intercalation pseudocapacitance mechanism realizes high-performance cathode for aqueous potassium ion batteries.

Aqueous potassium-ion batteries have garnered significant interest due to their eco-friendly characteristics and affordability. However, The suboptimal lifetime and restricted energy density of electrode materials present considerable obstacles to the advancement of aqueous potassium ion batteries. In this paper, we report a Ce doped MnO material (Ce-MnO).