Recent advances in material chemistry for zinc enabled redox flow batteries

Zhao, Qing‐Yuan; Yin, Guang‐Yuan; Liu, Yi‐Feng; Tang, Ruiren; Wu, Xiongwei; Zeng, Xian‐Xiang

doi:10.1002/cnl2.43

Cited by 15 publications

(8 citation statements)

References 130 publications

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“…This is still far from the ideal range, even with a maximal pH in the inner filling solution (pH 13). For this reason, a Zn/ZnCl 2 electrode was used as a reference electrode to raise the voltage to a value compatible with the desired working range from 0.5 to 1.5 V. The standard reduction potential of a single Zn 2+ /Zn element is −0.76 V . From the Nernst equation, a concentration of zinc ions of 100 mM should give a reduction potential of −0.82 V. Replacing the Ag/AgCl electrode (exhibiting a standard reduction potential of E 0 = 0.22 V) raises the potential by over 1 V. This increased the cell voltage to a range from 0.84 to 1.42 V with an inner solution pH of 7 (Figure b), corresponding to the ideal range to effectively drive the pixel array.…”

Section: Resultsmentioning

confidence: 99%

Distance-Based Self-Powered Signal Transduction of Ion-Selective Electrodes to an Electronic Paper Display Array

Qileng,

Wu,

Liu

et al. 2023

Anal. Chem.

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In this article, we report on the first distance-based readout self-powered potentiometric sensor. The approach is considered more user-friendly for detection by the naked eye and is less prone to optical interferences compared with a direct observation of the pixel darkening. pH-selective electrodes were chosen as a model system to demonstrate the principle in which seven bar-shaped pixels connected in series on one e-paper share one common ground. By connecting each of the pixels serially to capacitors of different capacitances, the fraction of the measurement cell voltage loaded onto the pixels becomes controllable. Consequently, the pixels give different gray values when powered by the same ion-selective electrode (ISE). As a result, the pH information on the sample is visualized as a distance-based signal and the dependence between the capacitance and 1/K (the reciprocal slope in the relationship between absorbance and pH) was constructed. In the current system, a 1 μF capacitance difference changes the value of 1/K by 4.18. With the current setup, the pH accuracy is about 0.5 when comparing the e-paper output to a color card.

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Section: Resultsmentioning

confidence: 99%

Distance-Based Self-Powered Signal Transduction of Ion-Selective Electrodes to an Electronic Paper Display Array

Qileng,

Wu,

Liu

et al. 2023

Anal. Chem.

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“…A pH-neutral zinc-iron flow battery (ZIRFB) [20] with Zn/ Zn 2 + pair and [Fe(CN) 6 ] 4À /3À pair serving respectively as the negative and positive redox couple was constructed to test full ARFB performance. Under neutral conditions, [21] zinc ions exist in the solvated Zn 2 + form, which could cross the cation exchange membrane, leading to the formation of solid ZnHCF (the zinc form of Prussian blue). This situation could lead to an obvious capacity loss in the system.…”

Section: Full Arfb Performance With Zn/ LI 4 [Fe(cn) 6 ] Cell At Ph-n...mentioning

confidence: 99%

Lithium Ferrocyanide Catholyte for High‐Energy and Low‐cost Aqueous Redox Flow Batteries**

Yao

Liu

et al. 2023

Angewandte Chemie

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Aqueous redox flow batteries (ARFBs) are a promising technology for grid-scale energy storage, however, their commercial success relies on redox-active materials (RAM) with high electron storage capacity and cost competitiveness. Herein, a redox-active material lithium ferrocyanide (Li 4 [Fe(CN) 6 ]) is designed. Li + ions not only greatly boost the solubility of [Fe(CN) 6 ] 4À to 2.32 M at room temperature due to weak intermolecular interactions, but also improves the electrochemical performance of [Fe(CN) 6 ] 4À /3À . By coupling with Zn, ZIRFBs were built, and the capacity of the batteries was as high as 61.64 Ah L À 1 (pH-neutral) and 56.28 Ah L À 1 (alkaline) at a [Fe(CN) 6 ] 4À concentration of 2.30 M and 2.10 M. These represent unprecedentedly high [Fe-(CN) 6 ] 4À concentrations and battery energy densities reported to date. Moreover, benefiting from the low cost of Li 4 [Fe(CN) 6 ], the overall chemical cost of alkaline ZIRFB is as low as $11 per kWh, which is one-twentieth that of the state-of-the-art VFB ($211.54 per kWh). This work breaks through the limitations of traditional electrolyte composition optimization and will strongly promote the development of economical [Fe(CN) 6 ] 4À /3Àbased RFBs in the future.

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“…With this in mind, there is a worldwide effort to rationally integrate sustainable green energy resources (solar, wind, tidal power, etc.) into large‐scale smart grids through inexpensive and eco‐friendly energy storage technologies, breaking intermittent, regional and seasonal constraints 4–8 . Among a wide range of energy storage technologies, rechargeable secondary batteries are superior to other technologies in energy storage systems (EESs) on the market based on their environmental benignity and superior conversion efficiency.…”

Section: Introductionmentioning

confidence: 99%

“…into large-scale smart grids through inexpensive and ecofriendly energy storage technologies, breaking intermittent, regional and seasonal constraints. [4][5][6][7][8] Among a wide range of energy storage technologies, rechargeable secondary batteries are superior to other technologies in energy storage systems (EESs) on the market based on their environmental benignity and superior conversion efficiency. In particular, lithium-ion batteries (LIBs) have been successfully commercialized for powering portable electronics and transportation applications in recent years.…”

Section: Introductionmentioning

confidence: 99%

Layered oxide cathodes for sodium‐ion batteries: From air stability, interface chemistry to phase transition

Liu

Han

Peng

et al. 2023

InfoMat

Self Cite

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Sodium-ion batteries (SIBs) are considered as a low-cost complementary or alternative system to prestigious lithium-ion batteries (LIBs) because of their similar working principle to LIBs, cost-effectiveness, and sustainable availability of sodium resources, especially in large-scale energy storage systems (EESs).Among various cathode candidates for SIBs, Na-based layered transition metal oxides have received extensive attention for their relatively large specific capacity, high operating potential, facile synthesis, and environmental benignity.However, there are a series of fatal issues in terms of poor air stability, unstable cathode/electrolyte interphase, and irreversible phase transition that lead to unsatisfactory battery performance from the perspective of preparation to application, outside to inside of layered oxide cathodes, which severely limit their practical application. This work is meant to review these critical problems associated with layered oxide cathodes to understand their fundamental roots and degradation mechanisms, and to provide a comprehensive summary of mainstream modification strategies including chemical substitution, surface modification, structure modulation, and so forth, concentrating on how to improve air stability, reduce interfacial side reaction, and suppress phase transition for realizing high structural reversibility, fast Na + kinetics, and superior comprehensive electrochemical performance. The advantages and

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Recent advances in material chemistry for zinc enabled redox flow batteries

Cited by 15 publications

References 130 publications

Distance-Based Self-Powered Signal Transduction of Ion-Selective Electrodes to an Electronic Paper Display Array

Distance-Based Self-Powered Signal Transduction of Ion-Selective Electrodes to an Electronic Paper Display Array

Lithium Ferrocyanide Catholyte for High‐Energy and Low‐cost Aqueous Redox Flow Batteries**

Layered oxide cathodes for sodium‐ion batteries: From air stability, interface chemistry to phase transition

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