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This year marks the 20th anniversary of the discovery of LaAlO3/SrTiO3 (LAO/STO) oxide heterointerfaces. Since their discovery, transition metal oxide (TMO) interfaces have emerged as a fascinating and fast‐growing area of research, offering a variety of unique and exotic physical properties which has provided a strong impetus for the rapid advances and actualization of oxide electronics. This review revisits the fundamental mechanisms accounting for the two‐dimensional (2D) conducting interfaces, and how new models proposed to better account for the unique interfacial effects. Recent breakthroughs in the theoretical and experimental domains of oxide interfaces are also discussed including the detection and investigation of 2D quasiparticle. Moving beyond the well‐known LAO/STO interface, this review delves into other systems where unconventional interfacial superconductivity, interfacial magnetism, and spin polarization are dealt with in greater detail. In terms of device applications, this review proceeds with a treatment on the recent developments in domains including field effect transistors and freestanding heterostructure membranes. By emphasizing the opportunities and challenges of integrating oxide interfaces with existing technologies, the review will end off with an outlook projecting the progress and the trajectory of this research domain in the years to come. [ABSTRACT FROM AUTHOR]

Manganese-based materials are considered as potential cathode materials for aqueous zinc-ion batteries due to the advantages of high voltage platform, non-toxic, and environmental protection. However, the rapid decline capacity due to the dissolution of manganese and the low conductivity restrict its further development. In this paper, Ni2+-doped ZnMn2O4 nanoparticles were prepared and used as cathode materials for aqueous zinc-ion batteries. The Ni2+-doping effectively improves its electrochemical performance. The Ni2+-doped ZnMn2O4 cathode shows a discharge-specific capacity of 175 mAh g−1 after an activation process at current density of 100 mA g−1. At a high current density of 1A g−1, the cathode displays a specific capacity of 120 mAh g−1, and the Coulombic efficiency of above 97% can be maintained throughout the cycles except for the first cycle, indicating a high reversibility of charging/discharging. The Ni2+-doping increases the conductivity and zinc-ion diffusion coefficient of the material electrode through destroying the periodic potential field generated by the material. It shows that the synergistic effect of manganese and transition metal ions provides a possible direction for the future development of cathode materials for aqueous zinc-ion batteries. [ABSTRACT FROM AUTHOR]