Composites of Prussian blue analogues and carbon black and cathode active materials for potassium ion secondary batteries

摘要

Problem to be solved: to provide a cathode material capable of obtaining a low resistance and a high capacity potassium ion secondary battery.(a1za2wk1 - (Z + 2W)) XMN [Fe (CN) 6] y nH2OIn the equation, A1 is at least one selected from the group consisting of NH4, Li and Na, A2 is at least one selected from the group consisting of Mg, Ca and Sr, X is 1 to 2, y is 0.8 to 1, n is 0 to 3, and Z is 0 to W is 0 to 0.1, and Z + 2W is 0 to 0.2.The amount of carbon black, which is a composite of the pristine blue analogue and carbon black, is shown in A Prussian blue analogue carbon black compound characterized by 0.1 to 10 parts by weight or less.No selection