Full Exploitation of Charge Compensation of O3‐type Cathode Toward High Energy Sodium‐Ion Batteries by High Entropy Strategy

O3-type cathodes with sufficient Na content are considered as promising candidates for sodium-ion batteries (SIBs). However, these cathodes suffer from insufficient utilization of the active elements, restraining the delivered capacity. In this work, a high entropy strategy is applied to a typical O3 cathode NaLi