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- W3028052891 abstract "Herein, we proposed a facile strategy for preparing well-distributed Sb-doped SnO2 nanoparticles on carbon paper (CP) via electrodeposition and in-situ oxidation as bifunctional electrodes for vanadium redox flow batteries. SnO2 and Sb-doped SnO2 modified carbon paper (CP-SnO2 and CP-SnO2/Sb) was respectively obtained by electrodepositing metals (Sn and Sn/Sb) nanoparticles, followed by a conversion to metal oxides with in-situ oxidation. CP-SnO2 exhibited better electrochemical performance toward V3+/V2+ and VO2+/VO2+ redox reactions than CP. This is because SnO2 increases active sites and hydrophilicity, which accelerates electrochemical kinetic and mass transfer for vanadium redox reactions. CP-SnO2/Sb had better electrochemical activity than CP-SnO2, because smaller Sb-doped SnO2 nanoparticles more effectively disperse through carbon fibers, producing more active sites. Furthermore, Sb doping improved conductivity of SnO2. Briefly, CP-SnO2/Sb exhibited excellent hydrophilicity, abundant active sites, and good conductivity, resulting in superior electrochemical activity. We next employed CP-SnO2/Sb as bifunctional electrodes in cell. The cell using CP-SnO2/Sb had better cycling stability and more capacity retention during a 50-cycle charge–discharge test at 50 mA cm−2. CP-SnO2/Sb reduced the electrochemical polarization of cell at higher current density. Overall, the cell using CP-SnO2/Sb showed a 9% increase in energy efficiency compared to pristine cell (64.5%) at 150 mA cm−2." @default.
- W3028052891 created "2020-05-29" @default.
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- W3028052891 date "2020-10-01" @default.
- W3028052891 modified "2023-09-30" @default.
- W3028052891 title "Sb-doped SnO2 nanoparticle-modified carbon paper as a superior electrode for a vanadium redox flow battery" @default.
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- W3028052891 doi "https://doi.org/10.1016/j.apsusc.2020.146685" @default.
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