Modification of Key Materials Toward Advanced Aqueous Zinc‐Ion Pouch Batteries

ABSTRACT Aqueous zinc‐ion batteries (AZIBs) are attractive and promising energy storage systems due to their high safety, low cost, environmental friendliness, and easy assembly. Recently, aqueous zinc‐ion pouch batteries (AZIPBs) have achieved rapid development, with a lot of work reported in a short time. However, reviews about AZIPBs are still limited. So here we timely present a review about AZIPBs by focusing on the modification of key materials, including cathode materials, Zn metal anodes, electrolytes, binders, separators, etc. Some basic information such as advantages, challenges, modification strategies of AZIBs and battery structure, existing issues, failure mechanisms of AZIPBs are also summarized and analyzed. Moreover, we put forward some opinions and outlooks based on our research experiences and reference analysis. We find the research of AZIPBs is still in an early and laboratory stage, and related work is too simple. More work should be proceeded in the future in aspects like deep mechanism investigation, practical application evaluation, recycling technology, and utilization of intellectual technology. We hope this review can provide some inspiration for the following research on AZIPBs. This review can attract large attention of related researchers in the future.