Flexible Aqueous Zinc‐Ion Batteries: From Materials to Applications

The rapid advancement of wearable electronics has imposed increasingly stringent requirements on power supplies, demanding high mechanical flexibility, robust energy density, inherent safety, and environmental sustainability. Flexible aqueous zinc‐ion batteries (FAZIBs) are regarded as a viable power solution for flexible devices and have achieved remarkable progress in this emerging field. This article reviews the latest research advances in FAZIBs for wearable electronics from the perspectives of materials, devices, and applications. First, we systematically summarize the design and optimization strategies of cathodic materials, anodic materials, and electrolytes, providing a comprehensive reference for subsequent material development. In the section on devices and applications, we elaborate on the characteristics of different battery configurations and their corresponding application scenarios, offering a systematic understanding of how device architecture and integration affect performance. Subsequently, this article outlines future research directions, including the development of highly stable cathodic and anodic materials, optimization of electrolyte composition and electrode/electrolyte interfaces, integration of high performance with mechanical flexibility in devices, and the advancement of industrial standardization. These insights aim to guide further research and facilitate the practical application of FAZIBs in wearable energy systems.