Zinc-Air Batteries provides a comprehensive understanding of the history and development of Zn-air batteries, with a systematic overview of components, design, and device innovation, along with recent advances in the field, especially with regards to the cathode catalyst design made by cutting-edge materials, engineering processes, and technologies. In particular, design principles regarding the key components of Zn-air batteries, ranging from air cathode, to zinc anode, and to electrolyte, are emphasized. Furthermore, industrial developments of Zn-air batteries are discussed and emerging new designs of Zn-air batteries are also introduced. The authors argue that designing advanced Zn-air battery technologies is important to the realization of efficient energy storage and conversion-and, going further, eventually holds the key to a sustainable energy future and a carbon-neutral goal. Edited and contributed to by leading professionals and researchers in the field, Zinc-Air Batteries also contains information regarding: Design of oxygen reduction catalysts in primary zinc-air batteries, including precious metals, single-atoms, carbons, and transition metal oxides; Design of bifunctional oxygen catalysts in rechargeable zinc-air batteries, covering specific oxygen redox reactions and catalyst candidates; Design of three-dimensional air cathode in zinc-air batteries, covering loading of carbon-based and transition metal catalysts, plus design of the three-phase interface; Design of electrolyte for zinc-air batteries, including liquid electrolytes (e.g., alkaline) and gel polymer electrolytes (e.g., PVA hydrogel).