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Cathode materials of sodium‐based batteries with high specific capacity and fast charge–discharge mode, as well as ultralong reversible cycles at wide applied temperatures, are essential for future development of advanced energy storage system. Developing transition metal selenides with intercalation features provides a new strategy for realizing the above cathode materials. Herein, this work reports...
Rechargeable aprotic lithium (Li)‐oxygen battery (LOB) is a potential next‐generation energy storage technology because of its high theoretical specific energy. However, the role of redox mediator on the oxide electrochemistry remains unclear. This is partly due to the intrinsic complexity of the battery chemistry and the lack of in‐depth studies of oxygen electrodes at the atomic level by reliable...