Turning carbon-ZnMnO powder in primary battery waste to be an effective active material for long cycling life supercapacitors: In situ gas analysis.

A simple and chemical-free recycled carbon-ZnMnO powder (composite) from the spent Zn-carbon batteries is proposed as an effective active material for the supercapacitor. This approach may amplify the economic and environmental benefits of the recycling process. We also synthesized the spherical MnO nanoparticles by the calcination followed by the chemical treatment.

mass change and gas analysis of 3D manganese oxide/graphene aerogel for supercapacitors.

Manganese oxide nanoparticles decorated on 3D reduced graphene oxide aerogels (3D MnO /rGO) for neutral electrochemical capacitors were successfully produced by a rapid microwave reduction process within 20 s. The symmetric electrochemical capacitor of 3D MnO /rGO (Mn 3.0 at%) storing charges both electric double layer capacitance (EDLC) and pseudocapacitance mechanisms exhibits a specific capacitance of 240 F g as compared with 190 F g of that using the bare 3D rGO at 0.

Effect of intercalated alkali ions in layered manganese oxide nanosheets as neutral electrochemical capacitors.

New insight into the influence of Li+, Na+, and K+ cations between adjacent layers of birnessite-type manganese oxides (MnOx) towards the intercalation/deintercalation charge storage mechanism as a neutral electrochemical capacitor (1 M Na2SO4) is demonstrated. These structural cations play a major role in both the kinetic electron transfer in a faradaic redox reaction and the accessibility of the compensating electrolyte ions. Li-MnOx shows the highest Mn utilization of 51% followed by Na-MnOx (40%) and K-MnOx (31%), respectively.