Prussian blue analogues (PBAs) have gained considerable attention as promising cathode materials for sodium-ion batteries (SIBs) due to their three-dimensional open framework structure, cost-effectiveness, and high theoretical capacity. Currently, fundamental research on and commercial exploration of PBAs in SIBs are making robust progress. This review summarizes recent advances and mainly highlights five key developments: (1) innovative synthesis methods, (2) compositional engineering, (3) advanced structural designs, (4) post-treatment and remediation techniques and (5) scalable synthesis. Finally, we present a forward-looking perspective on future research directions, emphasizing the importance of multidisciplinary approaches combining advanced characterization techniques and systematic engineering optimization to facilitate their commercialization for energy storage systems.
Sun et al. (2025) studied this question.