Advancing integrated high–energy metal–gas batteries

Metal–gas batteries emerge as a promising next–generation solution for energy storage in both portable and stationary applications. However, a significant challenge in their development is the need for integrated cathode materials capable of storing and catalyzing gaseous redox–active species, a requirement that is not yet well met under practical operating conditions. This review article addresses this gap by critically analyzing the current state of metal–gas battery research and highlighting the urgent need for integrated cathode materials. We provide a selective overview of pertinent gas storage materials and metal–gas battery technologies, emphasizing the potential for developing integrated cathode materials to advance next–generation metal–gas batteries. We anticipate that this review catalyzes extensive research in the field, propelling metal–gas batteries into a new era of development. This advancement is particularly crucial for portable applications such as transportation, where metal–gas batteries have the potential to significantly extend the travel range and efficiency.