an electrode material is created by forming a thin conformal coating of metal oxide on a highly porous carbon meta - structure . the highly porous carbon meta - structure performs a role in the synthesis of the oxide coating and in providing a three - dimensional , electronically conductive substrate supporting the thin coating of metal oxide . the metal oxide includes one or more metal oxides . the electrode material , a process for producing said electrode material , an electrochemical capacitor and an electrochemical secondary battery using said electrode material is disclosed .