| Abstract Scope |
Oxygen vacancies (Ov) play a pivotal role in altering the crystal structure, electronic structure, and chemical properties of oxides, expanding their applications in, for example, catalysis, energy storage, and hydrogen production. In this study, we synthesized binary, ternary, quaternary, and quinary metal oxides within the MgO-family. Through XRD, XPS, and TGA, we investigated the presence and concentration of Ov, discovering that Ov formation is closely linked to the type of metals involved. Our theoretical calculations corroborate these experimental findings. We further demonstrated the application of Ov-rich quinary oxides in lithium-ion batteries, where they exhibited excellent rate capability and long-term stability, confirming their potential use in Li-ion batteries. By employing consistent synthesis, characterization methods, and simulation models for oxides based on the MgO family, we can significantly enhance the understanding of Ov formation, thereby advancing the development of oxides with controlled Ov. |