کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
7738194 | 1497982 | 2014 | 5 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
PbO2-modified graphite felt as the positive electrode for an all-vanadium redox flow battery
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
شیمی
الکتروشیمی
پیش نمایش صفحه اول مقاله
![عکس صفحه اول مقاله: PbO2-modified graphite felt as the positive electrode for an all-vanadium redox flow battery PbO2-modified graphite felt as the positive electrode for an all-vanadium redox flow battery](/preview/png/7738194.png)
چکیده انگلیسی
A novel approach for enhancing the electrochemical performance of graphite felt electrodes by employing non-precious metal oxides is designed for an all-vanadium redox flow battery (VRFB). Lead dioxide (PbO2) is prepared through pulse electrodeposition method and characterized by X-ray diffraction (XRD) and scanning electron microscopy (SEM). The electrochemical performance of the prepared electrode is evaluated through cyclic voltammetry (CV) and electrochemical impedance spectroscopy (EIS). Results show that PbO2 exhibits excellent electro-catalytic activity and reactive velocity to vanadium redox couples. The coulombic efficiency (CE), voltage efficiency (VE), and energy efficiency (EE) of the vanadium redox flow battery with as-prepared electrodes at 70Â mAÂ cmâ2 are 99.5%, 82.4%, and 82.0%, respectively; these values are much higher than those of a cell assembled with bare graphite felt electrodes. The outstanding electro-catalytic activity and mechanical stability of PbO2 are advantageous in facilitating the redox reaction of vanadium ions, leading to the efficient operation of a vanadium redox flow battery.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Power Sources - Volume 250, 15 March 2014, Pages 274-278
Journal: Journal of Power Sources - Volume 250, 15 March 2014, Pages 274-278
نویسندگان
Xiaoxin Wu, Hongfeng Xu, Lu Lu, Hong Zhao, Jie Fu, Yang Shen, Pengcheng Xu, Yiming Dong,