Co-substitution in a Prussian blue analog with a hollow heterostructure for ultrahigh capacity and rate capability aqueous Zn2+ batteries

Nickel and manganese co-substitution in a hollow Prussian blue nanocubes has been successfully carried out via utilizing a high-concentration polymer template, with an ultrahigh capacity of 138.4 mA h g −1 at 0.05 A g −1 in an aqueous zinc-ion battery.