Oxygen-functionalized g-C3N4 layers anchored with Ni(OH)2 nanoparticles assembled onto Ni foam as binder-free outstanding electrode for supercapacitors
Autor: | Shengcai Wu, Lu Zhang, Yongfu Long, Xian Luo, Benjun Xu |
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Rok vydání: | 2020 |
Předmět: |
Materials science
Nanoparticle chemistry.chemical_element 02 engineering and technology Electrolyte 010402 general chemistry Electrochemistry 01 natural sciences chemistry.chemical_compound symbols.namesake Materials Chemistry Mechanical Engineering Metals and Alloys Graphitic carbon nitride 021001 nanoscience & nanotechnology Condensed Matter Physics 0104 chemical sciences Electronic Optical and Magnetic Materials Nickel chemistry Chemical engineering Mechanics of Materials Electrode symbols Hydroxide 0210 nano-technology Raman spectroscopy |
Zdroj: | Synthetic Metals. 270:116601 |
ISSN: | 0379-6779 |
DOI: | 10.1016/j.synthmet.2020.116601 |
Popis: | In this paper, a facile co-electrophoretic/electrodeposition method is reported to simple embedding a binder-free composite of porous oxygen-functionalized graphitic carbon nitride (O@g-C3N4)/nickel hydroxide nanoparticles (Ni(OH)2 NPs) into porous nickel-foam (NF) support. The prepared samples are analyzed using FT-IR, Raman, XRD, TGA/DSC, FE-SEM and TEM techniques. The analyses results proved formation of mixed α/β-Ni(OH)2 NPs onto the surface of O@g-C3N4 layers electrophoretically embedded onto NF support. The electrochemical charge storing ability of the fabricated O@g-C3N4/Ni(OH)2/NF electrode was evaluated in KOH electrolyte, and its specific capacity value was calculated to be as high as 967 C g−1, which was higher than those of pristine Ni(OH)2/NF and O@g-C3N4/NF electrodes (i.e. 754.8 C g‒1 and 287 C g‒1, respectively). Furthermore, O@g-C3N4/Ni(OH)2/NF exhibited an outstanding cycling stability of 94.4% after 5000 cycles at 3 A g‒1, which was higher than the long-term stability delivered by Ni(OH)2/NF electrode (i.e. 77.5% at 3 A g‒1). EIS data revealed that the fabricated O@g-C3N4/Ni(OH)2/NF hybrid electrode had lower internal resistance and smaller charge transfer resistance confirming its higher charge transfer rate and better electrical conductivity in comparison to pristine Ni(OH)2/NF electrode. |
Databáze: | OpenAIRE |
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