Structural Insight into the Abnormal Capacity of a Co-Substituted Tunnel-Type Na0.44MnO2 Cathode for Sodium-Ion Batteries.

Tunnel-type (T-type) Na0.44MnO2 (NMO) is a promising cathode material for sodium ion batteries (SIBs) owing to its high rate performance and cycling stability compared to manganese based layered ox...