Double-shelled hollow spheres of Co–Mn mixed oxide are fabricated through a template-engaged strategy at low temperature. For hybrid supercapacitors, this annealed battery-type electrode demonstrates high capacitance and long calendar life. Click to show full abstract
Double-shelled hollow spheres of Co–Mn mixed oxide are fabricated through a template-engaged strategy at low temperature. For hybrid supercapacitors, this annealed battery-type electrode demonstrates high capacitance and long calendar life.
               
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