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The MnO 2 electrodeposited on the surface of the carbon nanofiber mats (MnO 2 -LCNFM) were prepared from electrospun lignin-g-PAN copolymer via heat treatments and subsequent MnO 2 electrodeposition method. The resulting MnO 2 -LCNFM was evaluateed for its potential use in a supercapicitor electrode. The increase of MnO 2 electric deposition time was revealed to increase diameter of carbon nanofibers as well as MnO 2 content on the surface of carbon nanofiber mats as confirmed by scanning electon microscope (SEM) analysis. The electrochemical properties of MnO 2 -LCNFM electrodes are evaluated through cyclic voltammetry test. It was shown that MnO 2 -LCNFM electrode exhibited good electrochemical performance with specific capacitance of 168.0 mF⋅cm -2 . The MnO 2 -LCNFM supercapacitor successfully fabricated using the gel electrolyte (H 3 PO 4 /Polyvinyl alcohol) showed to have the capacitance efficiency of ∼90%, and stable behavior during 1,000 charging/discharging cycles.