Suppression of Jahn-Teller distortion in Layered Mn-Based Oxide Cathode with Li Substitution toward Achieving Stable K-Storage

Li-substitution suppressed the Jahn–Teller distortion, restraining unfavorable phase transition in KMO, and decreases the diffusion energy barrier of K + , promoting the diffusion of K + , which provides excellent K-storage activity in KLMO electrodes.