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- W4220939372 abstract "The electrochemical performance of carbon nanofiber (CNF) electrodes in vanadium redox flow batteries (VRFBs) is enhanced by optimizing the morphological and physical properties of low-cost electrospun CNFs. The surface area, porosity and electrical conductivity of CNFs are tailored by modifying the precursor composition, especially the sacrificing agent, Fe(acac)3, in the polymer precursor and carbonization temperature. A highly porous structure with a large surface area is generated by the catalytic growth of graphitic carbon spheres surrounding the iron nanoparticles which are removed by an acid etching process. The graphitic carbon layers formed at a high carbonization temperature improve the electrical conductivity of CNFs. The large surface area of 349 m2 g-1 together with the abundant mesopore-dominant structure leads to high wettability and high activity for redox reactions of the electrode, giving rise to enhanced electrochemical performance in VRFBs. It delivers an energy efficiency (EE) of 91.4% at a current density of 20 mA cm-2 and 79.3% at 100 mA cm-2, and maintains an average EE of 72.5% after 500 charge/discharge cycles at 100 mA cm-2." @default.
- W4220939372 created "2022-04-03" @default.
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- W4220939372 date "2022-01-01" @default.
- W4220939372 modified "2023-10-14" @default.
- W4220939372 title "Highly porous carbon nanofiber electrodes for vanadium redox flow batteries" @default.
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- W4220939372 doi "https://doi.org/10.1039/d1nr08376g" @default.
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