The effects of temperature and membrane thickness on the performance of aqueous alkaline redox flow batteries using napthoquinone and ferrocyanide as redox couple

Lee, Wonmi; Park, Gyunho; Chang, Duck Rye; Kwon, Yongchai

doi:10.1007/s11814-020-0669-0

Cited by 27 publications

(26 citation statements)

References 81 publications

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“…According to Figure 8, there are several noticeable findings about the QRFB results. First, IR drop potential was reduced in QRFB full cell using N 2 plasma‐treated CF (Figure 8A), and this is a clear evidence that N 2 plasma‐treated CF enhances the electron transfer rate of TironA, while the improved the electron transfer rate reduces its charge transfer resistance 30,43‐47 . As mentioned earlier, this is due to both the excellent hydrophilicity and electrostatic interaction of N 2 plasma‐treated CF.…”

Section: Resultssupporting

confidence: 57%

The effect of plasma treated carbon felt on the performance of aqueous quinone‐based redox flow batteries

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Shin

Lee

et al. 2021

Intl J of Energy Research

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4,5-dihydroxybenzene-1,3-disulfonic acid (Tiron) and anthraquinone-2,-7-disulfonic acid (AQDS) are interesting redox couples for aqueous quinonebased redox flow batteries (QRFBs) because of their high solubility and good reaction reversibility in acidic condition. Tiron is rate-determining material due to its slow reaction kinetics. To improve that, Tiron is transformed into 2,4,5,6-tetrahydroxybenzene-1,3-disulfonic acid (TironA), which is effectively formed during the first cycle of QRFB. Once TironA is formed, a desirable two-electron redox reaction with stable and reproducible charge and discharge step of QRFB occurs, although the electron transfer of TironA is still lower than that of AQDS. To further facilitate that of TironA, oxygen (O 2 ) and nitrogen (N 2 ) plasma-treated carbon felt (CF) electrodes are suggested. Oxygen functional groups formed onto CF by O 2 plasma become the active sites for redox reaction of TironA. As the amount of oxygen functional groups formed increases, the redox reactivity of TironA is enhanced. In contrast, when N 2 plasma is used, pyrrolic N and quaternary N are mainly formed. With the formation, (i) hydrogen atoms within pyrrolic N act as proton donor and interact with oxygen groups of TironA and (ii) nitrogen cations within quaternary N interact with the negatively charged atoms of TironA by electrostatic interaction. Thus, both reaction kinetic of TironA and performance of QRFB increase.Regarding the performance of QRFB using N 2 plasma-treated CF, its energy efficiency (EE), discharging capacity, and state of charge are 62%, 17.3 AhrÁL À1 and 64.5% for 50 cycle, which correspond to excellent achievements.

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Section: Resultssupporting

confidence: 57%

The effect of plasma treated carbon felt on the performance of aqueous quinone‐based redox flow batteries

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Shin

Lee

et al. 2021

Intl J of Energy Research

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“…2,8 Despite these various advantages of solar energy, the intermittent power generation and resulting need for an electrical energy storage system have become essential hurdles to expand its use. 9,10 Thus, photoelectrochemical water splitting (PECWS) is receiving attention as the adaptable solution of the above drawbacks of solar cells since the intermittency, and energy-saving issues can be overcome by converting solar energy to chemical energy, such as green hydrogen. 11 However, the efficiency of PECWS has been known to be about 10%, which is relatively lower than that of the solar cell (over 25%), 12 and the public receptivity and inconvenience in the use of hydrogen gas remain controversial in the usability of PECWS employing the solar-hydrogen energy system.…”

Section: Introductionmentioning

confidence: 99%

High performance of the flow-type one-compartment hydrogen peroxide fuel cell using buckypaper and narrow fuel pathway under physiological conditions

Jeon

Chung

2022

Sustainable Energy Fuels

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“…Currently, aqueous redox flow batteries (ARFBs) as energy storage system (ESS) receive deep attention due to their advantages of large capacity and long cycle life, let alone the unique ability to decouple the energy and power sector. In ARFB, energy can be chemically stored by redox reactions of two liquid electrolytes containing the dissolved active materials divided by an ion‐exchange membrane 1‐5 . To fortify the viability of ARFB as standard ESS, it is required to discover its new redox couple.…”

Section: Introductionmentioning

confidence: 99%

“…In ARFB, energy can be chemically stored by redox reactions of two liquid electrolytes containing the dissolved active materials divided by an ion-exchange membrane. [1][2][3][4][5] To fortify the viability of ARFB as standard ESS, it is required to discover its new redox couple. For this purpose, metals have been considered so far.…”

Section: Introductionmentioning

confidence: 99%

Symmetric aqueous redox flow battery using hydroiodic acid and anthraquinone‐2, 7‐disulfonic acid as redox couple

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Lee

Kwon

2022

Intl J of Energy Research

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Summary Iodide and triiodide ions (I− and I3− ions) are interesting active redox materials for aqueous redox flow batteries (ARFBs) due to high solubility in various supporting electrolytes. However, under alkaline and neutral electrolytes, the redox reaction of I− and I3− ions is unstable due to undesirable potassium iodate produced during the reaction, whereas the reaction is stably operated under an acidic electrolyte state. As a redox couple, anthraquinone‐2,7‐disulfonic acid (AQDS) is considered due to excellent stability and high solubility, and perchloric acid is determined as an electrolyte because this suppresses another undesirable water‐splitting reaction. For providing abundant I− and I3− ions, hydroiodic acid (HI) is used because hydrogen ions contained in HI can act as a proton donor, increasing the conductivity in the solution leading to better kinetics of the redox reaction of I− and I3−. When asymmetric ARFB using this redox couple is operated, gradual decay in both capacity and efficiencies is observed. This is due to the crossover of I− ions to the AQDS side. To overcome the problem, symmetric ARFB using the mixture of HI and AQDS in both electrolytes is adopted, and with that, the crossover issue is solved because the ionic balance of electrolyte is well maintained by the use of symmetric electrolyte, while its energy efficiency and discharging capacity are excellent as 67.6% and 26.6 Ah L−1, respectively, with capacity retention of 99.99% for 100 cycles.

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The effects of temperature and membrane thickness on the performance of aqueous alkaline redox flow batteries using napthoquinone and ferrocyanide as redox couple

Cited by 27 publications

References 81 publications

The effect of plasma treated carbon felt on the performance of aqueous quinone‐based redox flow batteries

The effect of plasma treated carbon felt on the performance of aqueous quinone‐based redox flow batteries

High performance of the flow-type one-compartment hydrogen peroxide fuel cell using buckypaper and narrow fuel pathway under physiological conditions

Symmetric aqueous redox flow battery using hydroiodic acid and anthraquinone‐2, 7‐disulfonic acid as redox couple

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