Yang, Cheol-Min Kim, Bo-Hye 2024-01-19T20:04:54Z 2024-01-19T20:04:54Z 2021-09-02 2019-04-05 0925-8388 https://pubs.kist.re.kr/handle/201004/120111 MnO2- and boron-incorporated polyacrylonitrile (PAN)/pitch-based carbon nanofiber (PPBMn) composites for electrochemical supercapacitors are successfully fabricated by one-step electrospinning using a combined solution of MnCl2, B2O3, PAN, and pitch. The surface morphologies, microstructures, surface chemical states, and texture properties of the PPBMn composites are investigated and the effect of the MnCl2 content on the electrochemical performance in aqueous electrolytes is also examined. The PPBMn composites exhibit a high specific surface area with mesoporous structure, and boron and MnO2 functional groups as electroactive sites. Enriched boron and MnO2 functional groups provide low internal resistance of charge diffusion by better wettability of electrolyte ions into the pores and also accommodate more charges, leading to high gravimetric capacitance and energy density, and enhanced cycling stability. Therefore, the PPBMn series exhibits superior electrochemical performance through the combined functions of their double-layer capacitance and pseudo-capacitive character through the high porosity, higher attractive force by the surface chemical activity and the wettability between the electrode and electrolyte. (C) 2018 Elsevier B.V. All rights reserved. English ELSEVIER SCIENCE SA ACTIVATED CARBON MESOPOROUS CARBON PERFORMANCE GRAPHENE CAPACITANCE NANOPARTICLES COMPOSITES NANOTUBES GRAPHITE WEBS Incorporation of MnO2 into boron-enriched electrospun carbon nanofiber for electrochemical supercapacitors Article 10.1016/j.jallcom.2018.11.347 1 JOURNAL OF ALLOYS AND COMPOUNDS, v.780, pp.428 - 434 JOURNAL OF ALLOYS AND COMPOUNDS 780 428 434 scie scopus 000456789000052 2-s2.0-85057789384 Chemistry, Physical Materials Science, Multidisciplinary Metallurgy & Metallurgical Engineering Chemistry Materials Science Metallurgy & Metallurgical Engineering Article ACTIVATED CARBON MESOPOROUS CARBON PERFORMANCE GRAPHENE CAPACITANCE NANOPARTICLES COMPOSITES NANOTUBES GRAPHITE WEBS MnO2 Boron-enriched carbon nanofiber Porosity Electrochemical performance