Prussian white composite material, and preparation method therefor and use thereof

Abstract

A Prussian white composite material. The Prussian white composite material includes an inner core and a carbon coating layer that coats at least a portion of an outer surface of the inner core, where the inner core has a general formula of NaxMn1-yMy[Fe(CN)6]z, in the formula, M is selected from at least one of Fe, Co, Ni, Cu and Zn, x is greater than 1.5 and equal to or less than 2, y is greater than 0 and equal to or less than 0.3, and z is greater than 0.8 and equal to or less than 1. The Prussian white composite material of the present invention is free of crystal water (including interstitial water and coordinated water), has complete crystal lattices and good ionic conductivity and thermal stability, and is hardly decomposed at 500° C. A preparation method has the advantages of being simple in process, low in cost, short in period, low in energy consumption, suitable for industrial production and the like.

Dependencies are inferred from the claim text.