Investigation of Hydroxylated Carbon Felt Electrode in Vanadium Redox Flow Battery by Using Optimized Supporting Electrolyte

سال انتشار: 1395
نوع سند: مقاله ژورنالی
زبان: انگلیسی
مشاهده: 122

فایل این مقاله در 6 صفحه با فرمت PDF قابل دریافت می باشد

استخراج به نرم افزارهای پژوهشی:

لینک ثابت به این مقاله:

شناسه ملی سند علمی:

JR_JREE-3-4_007

تاریخ نمایه سازی: 10 آبان 1402

چکیده مقاله:

Traditional vanadium batteries use pure sulfuric acid as electrolyte, but H۲SO۴ does not absorb enough vanadium ions to make the electrolyte an efficient energy source. This study investigates the effect of hydroxylation process on electrochemical and operational properties of carbon felt electrode in VOSO۴ solution with an optimized supporting electrolyte (a mixture of six parts HCl and ۲.۵ parts H۲SO۴). Carbon felt electrode was hydroxylated with mixed acids of H۲SO۴ and HNO۳ in a stainless steel autoclave for ۶ h. Then thermal treatment of electrode was performed at ۴۰۰ oC for ۵h. Obtained results of cyclic voltammograms showed that when the carbon felt was hydroxylated, both oxidation and reduction peak currents were increased remarkably and the peak potential separation is decreased from ۳۵۶ mV to ۲۴۶ mV, suggesting that the electrochemical activity and the kinetic reversibility on HCF electrode were improved compared to the pristine one. According to results of electrochemical impedance spectra, charge transfer resistance (Rct) was calculated to be ۶۴۸ Ω for pristine carbon felt. The obtained Rct at hydroxylated electrode (۱۷۶ Ω) shows a decrease of about ۷۳ % in Rct. Charge-discharge profiles of two cells assembled with the pristine carbon felt (cell A), and hydroxylated carbon felt (cell B) showed that energy, voltage and coulombic efficiencies were significantly improved by using the hydroxylated electrodes inside the cell of vanadium redox flow battery.

کلیدواژه ها:

نویسندگان

Mohammad Zarei-Jelyani

Institute of Mechanics, Iranian Space Research Center, Shiraz, Iran

Mohsen Babaiee

Institute of Mechanics, Iranian Space Research Center, Shiraz, Iran

Abdolmajid Ghasemi

Institute of Mechanics, Iranian Space Research Center, Shiraz, Iran

Rahim Eqra

Institute of Mechanics, Iranian Space Research Center, Shiraz, Iran

مراجع و منابع این مقاله:

لیست زیر مراجع و منابع استفاده شده در این مقاله را نمایش می دهد. این مراجع به صورت کاملا ماشینی و بر اساس هوش مصنوعی استخراج شده اند و لذا ممکن است دارای اشکالاتی باشند که به مرور زمان دقت استخراج این محتوا افزایش می یابد. مراجعی که مقالات مربوط به آنها در سیویلیکا نمایه شده و پیدا شده اند، به خود مقاله لینک شده اند :
  • Parasuraman, A., Lim, T.M., Menictas, C. and Skyllas-Kazacos, M., "Review ...
  • Rahman, F. and Skyllas-Kazacos, M., "Vanadium redox battery: Positive half-cell ...
  • Roe, S., Menictas, C. and Skyllas-Kazacos, M., "A high energy ...
  • Liu, Q., Grim, G., Papandrew, A., Turhan, A., Zawodzinski, T. ...
  • Kabir, H., Gyan, I. O. and Cheng, I. F., "Electrochemical ...
  • Wang, W. and Wang, X., "Investigation of Ir-modified carbon felt ...
  • Liu, T., Li, X., Xu, C. and Zhang, H., "Activated ...
  • Sun, B. and Skyllas-Kazacos, M., "Modification of graphite electrode materials ...
  • Sun, B. and Skyllas-Kazacos, M., "Chemical modification of graphite electrode ...
  • Noack, J. and Tübke, J., "A comparison of materials and ...
  • Li, X.-g., Huang, K.-l., Liu, S.-Q., Ning, T. and Chen, ...
  • González, Z., Sánchez, A., Blanco, C., Granda, M., Menéndez, R. ...
  • Li, L., Kim, S., Wang, W., Vijayakumar, M., Nie, Z., ...
  • Yue, L., Li, W., Sun, F., Zhao, L. and Xing, ...
  • Bard, A.J. and Faulkner, L.R., "Fundamentals and applications", Electrochemical Methods, ...
  • Lefrou, C., Fabry, P. and Poignet, J.-C., "Electrochemistry: the basics, ...
  • Conway, B. and Jerkiewicz, G., "Nature of electrosorbed H and ...
  • نمایش کامل مراجع