Abstract. High surface area mesoporous manganese dioxide (MnO2) with a-phase crystalline structure has been synthesized by the reduction of potassium permanganate with ethylene glycol under acidic conditions. Nitrogen sorption analyses show that MnO2 synthesized under acidic conditions exhibits a type IV isotherm, indicating a mesoporous character. Electrochemical performances of MnO2 sampl…
Abstract. Utilizing the dual functions of activated carbon (AC) both as a conductive agent and an active substance of a positive electrode, a hybrid supercapacitor (AC-MnO2&AC) with a composite of manganese dioxide (MnO2) and activated carbon as the positive electrode (MnO2&AC) and AC as the negative electrode is fabricated, which integrates approximate symmetric and asymmetric behaviors in…