Lee, Do Geum Yang, Cheol-Min Kim, Bo-Hye 2024-01-20T02:01:52Z 2024-01-20T02:01:52Z 2021-09-01 2017-03-01 1572-6657 https://pubs.kist.re.kr/handle/201004/122967 Heteroatoms (B, N, O)-containing porous manganese oxide (MnO2)/carbon nanofiber (MnB-CNF) materials are prepared by one-step electrospinning method via polyacrylonitrile (PAN) and manganese(II) chloride (MnCl2) in dimethylformamide (DMF) solution containing different concentrations of B2O3. The MnB-CNF electrode exhibits optimized electrochemical behavior with a high energy density of 22.6 Whkg(-1) at a power density of 400 Wkg(-1) and a specific capacitance range of 210-160 Fg(-1) in the discharge current density range of 1.0 to 20 mAcm(-2) in aqueous KOH electrolyte. The higher electrochemical performance of MnB-CNF as a result of the electrochemical double-layer capacitor (EDLC), compared to regular Mn-CNF without B-based functional groups, is attributed to well-balanced meso-and micropores affecting the easy adsorption and transport of electrolyte ions, in addition to the pseudocapacitive redox reactions from MnO2, N, O, and extra numerous B in alkaline electrolytes. Thus, tailoring the pore structures with proper specific surface area, pore size, and number of heteroatoms is crucial for optimizing their electrochemical properties in the combined efforts to develop EDLCs and pseudocapacitance. (C) 2017 Elsevier B.V. All rights reserved. English ELSEVIER SCIENCE SA HIGH-PERFORMANCE SUPERCAPACITOR CAPACITIVE PERFORMANCE ACTIVATED CARBON ELECTRODE NANOTUBES NITROGEN HYBRIDS OXIDE FILM Enhanced electrochemical properties of boron functional groups on porous carbon nanofiber/MnO2 materials Article 10.1016/j.jelechem.2017.01.059 1 JOURNAL OF ELECTROANALYTICAL CHEMISTRY, v.788, pp.192 - 197 JOURNAL OF ELECTROANALYTICAL CHEMISTRY 788 192 197 scie scopus 000397361300026 2-s2.0-85013197065 Chemistry, Analytical Electrochemistry Chemistry Electrochemistry Article HIGH-PERFORMANCE SUPERCAPACITOR CAPACITIVE PERFORMANCE ACTIVATED CARBON ELECTRODE NANOTUBES NITROGEN HYBRIDS OXIDE FILM Heteroatoms Mno(2) Carbon nanofiber Electrical double -layer capacitor Pseudocapacitor