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Cryptomelane-type MnO2 (α-MnO2) was directly deposited on carbon fiber paper (CFP) by a simple electrochemical method and evaluated as the active material of binder-free electrodes for supercapacitors. The obtained α-MnO2@CFP electrode exhibits a higher capacitance and better rate capability than the ε-MnO2@CFP electrode prepared by the conventional electrochemical method. For the α-MnO2@CFP electrode,...
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