The Mn ₂ O ₃ @ZnMn ₂ O ₄ /C hollow microspheres were synthesized by room-temperature stirring and then annealing under air atmosphere. Benefiting from the unique structure, its application in AZIBs as cathode exhibits excellent electrochemical performance.

Tri-modal microstructure is often the target microstructure of titanium alloy components. In this study, the parameters, such as volume fraction, size of primary equiaxed α (α_p), secondary lamellar α (α_s) and thin α plates (α_t) in tri-modal microstructure of Ti-6Al-2Zr-1Mo-1V alloy are adjusted by double heat treatment procedures. The properties of these constituent phases and their effect on the macro-properties are then investigated. The results show that the hardness of primary α (α_p) varies slightly with heat treatment routes. The hardness of α plates region including α_s and α_t increases with increasing α_t volume fraction and not with decreasing thickness of α_s and α_t. Using volume average of the thickness of α_s and α_t as effective thickness (t_eff), the hardness of α plates region and t_eff follow the Hall-Petch relationship. Meanwhile, as α_t volume fraction increases, colony structure of α_s is gradually destroyed, which makes each α_s have large deformation degree by multiple directions slip. When volume fraction ratio of α_p, α_s and α_t is about 1:1:1, α_p and α_s can undergo relatively large deformation and α_t can contribute relatively large strength to the alloy and therefore the alloy has both good strength and ductility.