Enhancing Mg²⁺ and Mg²⁺/Li⁺ Storage by Introducing Active Defect Sites and Edge Surfaces in MoSe₂

Recently, Mg‐ion batteries (MIBs) and Mg−Li hybrid ion batteries (MLIBs) are deemed as potential energy‐storage devices. However, due to the insufficient storage sites of Mg 2 + in the cathode, MIBs show a low reversible capacity. For MLIBs, the property is also seriously restricted due to the main Li + intercalation reaction and less Mg 2+ intercalation reaction. Herein, ultrathin MoSe 2 nanosheets with enriched atomic defects and exposed edge...