Ultra-stable Mn-based Prussian Blue Compound Effectively Suppresses Jahn-Teller Distortion as Superior Cathode Material for Sodium-ion Batteries

By regulating the nucleation rate of the coprecipitation reaction, cubic NaMHCF was successfully prepared, which can effectively inhibit the Jahn–Teller effect and can work normally as the cathode of SIB even in low-temperature environments.