Prussian blue analogues (PBAs) have emerged as promising cathode materials for next-generation potassium-ion (PIBs) and sodium-ion batteries (SIBs) owing to their simple synthesis, low cost, structural robustness, and well-balanced electrochemical properties. Despite these advantages, several intrinsic challenges continue to limit their practical implementation. This review provides a concise roadmap connecting material-level fundamentals with key lab-scale optimization strategies, and highlights the factors that most critically influence the real-world viability of PBAs. Beyond targeting high performance, we evaluate the practicality of different approaches, with particular attention to particle size, crystal water, and safety considerations. The discussion aims to guide researchers in advancing PBAs toward scalable non-aqueous energy-storage systems and in supporting the broader development of sustainable battery technologies.
Mei et al. (Tue,) studied this question.