Co/Al Co-Substituted Layered Manganese-Based Oxide Cathode for Stable and High-Rate Potassium-Ion Batteries.

ABSTRACT: Manganese-based layered oxides are promising cathode materials for potassium-ion batteries (PIBs) due to their low cost and high theoretical energy density. However, the Jahn-Teller effect of Mn³⁺ and sluggish diffusion kinetics lead to rapid electrode deterioration and a poor rate performance, greatly limiting their practical application. Here, we report a Co/Al co-substitution strategy to construct a P3-type K_0.45Mn_0.7Co_0.2Al_0.1O₂ cathode material, where Co³⁺ and Al³⁺ ions occupy Mn³⁺ sites. This effectively suppresses the Jahn-Teller distortion and alleviates the severe phase transition during K⁺ intercalation/de-intercalation processes. In addition, the Co element contributes t

SUBMITTER: Li J 

PROVIDER: S-EPMC10972413 | biostudies-literature | 2024 Mar

REPOSITORIES: biostudies-literature