Acidic aqueous redox flow battery using 12-phosphotungstic acid and 2,4,5,6-tetrahydroxybenzene-1,3-disulfonic acid as redox couple

Agnesia Permatasari, Wonmi Lee, Yongchai Kwon

研究成果: ジャーナルへの寄稿学術誌査読

抄録

In this study, acidic aqueous redox flow battery (ARFB) using 12-phosphotungstic acid (PTA) and 1,2-benzoquinone-3,5-disulfonic acid (Tiron) as negative and positive active materials is suggested. As negative active material, PTA shows high solubility in an acidic state (0.4 M PTA is soluble in 1.0 M sulfuric acid [H2SO4]), negative reaction potential (−0.25 V vs Ag/AgCl), and is linked to four-electron reaction. Regarding positive active material, Tiron is chosen due to its high solubility in H2SO4 (1.5 M Tiron is soluble in 1 M H2SO4) and highly positive reaction potential (0.76 V vs Ag/AgCl) with two-electron related reactions. For preserving its redox reactivity, Tiron is initially transformed to its desirable 2,4,5,6-tetrahydroxybenzene-1,3-disulfonic acid (TironA). As a result, the cell potential of ARFB using PTA and TironA is 0.92 V, while their low viscosities reduce the possibility of precipitation. With this, its cycle stability is well preserved. Regarding the performance of ARFB using PTA and TironA, this maintains cycle stability for more than 170 cycles with capacity retention of 99% and high columbic and energy efficiencies of 99% and 70% at 60 mA cm−2.

本文言語英語
ページ(範囲)13013-13022
ページ数10
ジャーナルInternational Journal of Energy Research
46
9
DOI
出版ステータス出版済み - 7月 2022
外部発表はい

!!!All Science Journal Classification (ASJC) codes

  • 再生可能エネルギー、持続可能性、環境
  • 原子力エネルギーおよび原子力工学
  • 燃料技術
  • エネルギー工学および電力技術

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