Enhanced electrochemical performance in an aluminium doped δ-MnO 2 supercapacitor cathode: experimental and theoretical investigations

Experimental analysis and theoretical calculation methods have been applied to gain a deep understanding of the electrochemical performance of the δ-Al 0.06 MnO 2 system. Al doping could weaken the surface energy and hinder the side reaction or structure transformation, leading to a better cycling and rate performance of δ-MnO 2 .