Layer-by-layer self-assembly of manganese oxide nanosheets/polyethylenimine multilayer films as electrodes for supercapacitors

Preparation and capacitance property of MnO2-pillared Ni2+–Fe3+ layered double hydroxides nanocomposite

“…These cyclic voltammetric curves are relatively rectangular in shapes and exhibit near mirror-image current response on voltage reversal, indicating an obvious supercapacitive behavior for the obtained materials. Meanwhile, these curves show no peaks, indicating that the electrode capacitor is charged and discharged at a pseudoconstant rate over the complete voltammetric cycle [46,47]. The CV curve for sample MnO 2 -LDHs electrode is distorted (Fig.…”

Fabrication of MnO2-pillared layered manganese oxide through an exfoliation/reassembling and oxidation process

“…The CV curves of three samples obtained in a Na 2 SO 4 (1.0 mol L −1 ) solution at a sweep rate of 5 mV s −1 show relatively rectangular mirror images with respect to the zero-current line, indicating an obvious capacitive behavior for the obtained materials. Meanwhile, these curves show no peaks, indicating that the electrode capacitor is charged and discharged at a pseudoconstant rate over the complete voltammetric cycle [29,30]. The CV curves of samples MnO 2 -BirMO and MnO 2 -BirMO (200 • C) electrodes are distorted ( Fig.…”

Carbon nanotube/MnO2 composites synthesized by microwave-assisted method for supercapacitors with high power and energy densities

“…Conducting polymers are famous for their high flexibility, but have poor cyclability [9,10]. As for the transition-metal oxides, over the past decades, manganese oxides have received considerable attention for supercapacitors due to its low cost, abundance, high theoretical specific capacitance (∼1100 F g −1 ) and good environmental compatibility [5,[11][12][13][14][15]. Zolfaghari et al prepared nanostructured MnO 2 by a sonochemical method from an aqueous solution of potassium bromate and manganese sulfate and the maximum specific capacitance was 344 F g −1 at a scan rate of 5 mV s −1 in 0.5 mol L −1 Na 2 SO 4 aqueous solution [16].…”