from left to right are the constant current charge-discharge curves of materials a) CoFe2O4, b) CoFe2O4@AC 10%, and c) CoFe2O4@Cell 10% synthesized by the co-precipitation method.
Please help me answer why at low currents of 0.5 A/g and 1 A/g, the voltage does not reach the upper limit of the voltage window?
Thank you