Preparation of Porous Carbon-Manganese Dioxide Nanocomposite as a Supercapacitor Electrode

摘要

Activated porous carbons were prepared from paulownia flower by carbonization and subsequentalkali activation. Then MnO2-AC3 composite was synthesized by the electrochemical deposition ofmanganese oxide nanostructures on the surface of as-prepared activated porous carbons. The MnO2- AC3 electrode demonstrates outstanding capacitive behavior with low charge transfer resistance owingto the double layer charge storage and unique pore structure (coexistence of micropores, mesoporesand macropores) of activated porous carbons. The stability of MnO2-AC3 electrode was affirmed by1000 successive charge/discharge cycles. The remarkable capacitive behavior and excellent stabilitymake MnO2-AC3 promising material with potential application in supercapacitor.