Supercapacitive Performance of Ordered Mesoporous Carbon (CMK-۳) in Neutral Aqueous Electrolyte

Ordered Mesoporous Carbon (OMC) represents an interesting material for electric double layer capacitors which has the high surface area, easily accessed ordered pore channels and lower production cost. In this work, CMK-۳ as promising OMC has been fabricated using the ordered mesoporous silica SBA-۱۵ as a template. The structure and morphology of CMK-۳ are characterized by X-ray diffraction, nitrogen adsorption/desorption, and scanning electron microscopy. CMK-۳ is sprayed on the surface of highly conductive three-dimensional nickel foam and characterized as an electrode for electric double layer capacitors. When this electrode is soaked in a neutral aqueous electrolyte solution, reaches a specific capacitance as high as ۲۸۵ and ۱۶۷ F/g, at a current density of ۱۰ and ۳۴ A/g, respectively. CMK-۳ shows excellent long-term stability with >۹۰% capacitance retention after ۱۰۰۰۰ cycles, as well as high power (۳۷ kW/kg) and energy density (۹۸ Wh/kg).

کلیدواژه ها:

Mesoporous carbon ، Supercapacitor ، Neutral aqueous electrolyte ، High power ، Symmetric