Fig. 8

Galvanostatic charge–discharge profiles for (a) Pure CuFe2O4, (b) 1 mol% Eu-doped CuFe2O4, (c) 3 mol% Eu-doped CuFe2O4, (d) 5 mol% Eu-doped CuFe2O4.

Galvanostatic charge–discharge profiles for (a) Pure CuFe2O4, (b) 1 mol% Eu-doped CuFe2O4, (c) 3 mol% Eu-doped CuFe2O4, (d) 5 mol% Eu-doped CuFe2O4.