Controlling the Molar Ratios of Cation to Anion of Precursors for High Performance Capacitive Properties of MnO2 Hybridized Carbon-Based Materials Electrode

Controlling the cation to anion (Mn2+/MnO4−) molar ratios of precursors was used obtain a highly performance capacitive properties nanostructural MnO2 hybridized carbon-based materials on nickel foam (NF) through successive ionic layer adsorption and reaction technology. SEM, XRD, BET, XPS analyses are utilized investigate influence cation/anion as-obtained electrode materials. At lower ratio 1, prepared manganese oxide deposited NF with obvious δ-MnO2 phase. The average pore size distribution BET analysis is about 4.6 nm, specific surface area 155.7 m2 g−1, exhibiting mesoporous structure. However, when higher than 5, film produced by exhibits γ-MnO2 crystal capacitance δ-MnO2/NF 280 F g−1 at 1 A in M Na2SO4 aqueous electrolyte solution. In addition, reduced graphene (rGO) mixed multi-wall carbon nanotube (MWCNT) added synthesize γ-MnO2/rGO-MWCNT/NF electrode, which has high 377.4 under charge/discharge current density g−1.