Investigation of electrolytes of the vanadium redox flow battery (VII): Prediction of the viscosity of mixed electrolyte solution (VOSO4 + H2SO4 + H2O) based on Eyring’s theory

Li, Xiangrong; Jiang, Chenglin; Qin, Ye; Liu, Jianguo; Yang, Jing; Xu, Qian; Yan, Chuanwei

doi:10.1016/j.jct.2019.02.020

Cited by 13 publications

(6 citation statements)

References 37 publications

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“…Controlling viscosity parameters is of great importance for the improvement of solution fluidity and the enhancement of electrochemical mass transfer [ 20 , 53 ]. In recent years, researchers from the Institute of Metal Research, Chinese Academy of Sciences, have focused on modeling the viscosity of electrolytes with different additives [ 91 , 92 , 93 ]. Li et al [ 92 ] first proposed a semi-empirical method to estimate the viscosities of ternary mixtures of VOSO 4 ·H 2 SO 4 ·H 2 O for an electrolyte without extra additives.…”

Section: Organic Additivesmentioning

confidence: 99%

A Review of Electrolyte Additives in Vanadium Redox Flow Batteries

Tian

Wang

et al. 2023

Materials

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Vanadium redox flow batteries (VRFBs) are promising candidates for large-scale energy storage, and the electrolyte plays a critical role in chemical–electrical energy conversion. However, the operating temperature of VRFBs is limited to 10–40 °C because of the stability of the electrolyte. To overcome this, various chemical species are added, but the progress and mechanism have not been summarized and discussed yet. This review summarizes research progress on electrolyte additives that are used for different purposes or systems in the operation of VRFBs, including stabilizing agents (SAs) and electrochemical mass transfer enhancers (EMTEs). Additives in vanadium electrolytes that exhibit microscopic stabilizing mechanisms and electrochemical enhancing mechanisms, including complexation, electrostatic repulsion, growth inhibition, and modifying electrodes, are also discussed, including inorganic, organic, and complex. In the end, the prospects and challenges associated with the side effects of additives in VRFBs are presented, aiming to provide a theoretical and comprehensive reference for researchers to design a higher-performance electrolyte for VRFBs.

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Section: Organic Additivesmentioning

confidence: 99%

A Review of Electrolyte Additives in Vanadium Redox Flow Batteries

Tian

Wang

et al. 2023

Materials

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“…The viscosity of the solution was also regressed by the application of the model, according to the functional form of the excess Gibbs energy and Eyring’s absolute reaction rate theory. − where η is the dynamic viscosity of the solution, V represents the molar volume of the solution, h is Planck’s constant ( h = 6.62607015 × 10 –34 ; J·s), and N A is Avogadro’s constant ( N A = 6.02214076 × 10 23 ; mol –1 ), Δ G * is the molar Gibbs energy change of activation for the flow process, R is the universal gas constant, and T is the absolute temperature.…”

Section: Theoriesmentioning

confidence: 99%

Densities and Viscosities of Binary and Ternary Solutions of Triethylenetetramine, 2-Amino-2-methyl-1-propanol, and Water for Carbon Dioxide Capture

et al. 2021

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The densities and viscosities of three solutions, namely, two binary solutions [triethylenetetramine (TETA) + H2O and TETA + 2-amino-2-methyl-1-propanol (AMP)] and one ternary solution (TETA + AMP + H2O) were measured at atmospheric pressure and in the temperature range of 303.15 to 343.15 K. Their viscometric and volumetric characteristics, such as the excess molar volume (V E), partial molar volume (V̅ i ), excess partial molar volume (V̅ i E), partial molar volume at infinite dilution (V̅ i ∞), excess partial molar volume at infinite dilution (V̅ i E,∞), apparent molar volume (V φ.i ), viscosity deviation (Δη), molar Gibbs free energy (ΔG), molar entropy (ΔS), and molar enthalpy (ΔH), were calculated to determine the viscous flows of the solutions, and they could also explain the empirical results theoretically. The degrees of the decrease in viscosities and densities of the solutions were different. The variations in the properties were also analyzed through their intermolecular interactions and molecular structures. Additionally, Δη and V E were obtained by the Redlich–Kister model, for the binary solutions, and the Cibulka model, for the ternary solution. With the given standard deviations, σ ≤ 3.55, for the binary solutions, and σ = 3.98, for the ternary solution, the viscosity data were parameterized by the Eyring–non-random two-liquid model. The obtained thermodynamic properties were reliable and could be employed in the design and optimization of a CO2-capture process, utilizing the studied solutions.

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“…To advance overall performance of the all vanadium redox flow battery, much effort has been made to enhance the electrode properties of the VRFB by utilizing sulfonation treatment, functional groups that include chlorine atoms and nitrogen atoms, as well as TiO 2 nanoparticles . Besides, properties of the electrolyte and the membrane are also improved by the researchers . For the given assembly materials and electrolyte, performance of the battery can be enhanced by optimizing its structures as well as the operating conditions that play an important role in the species transport of the VRFBs …”

Section: Introductionmentioning

confidence: 99%

“…14 Besides, properties of the electrolyte and the membrane are also improved by the researchers. [15][16][17] For the given assembly materials and electrolyte, performance of the battery can be enhanced by optimizing its structures as well as the operating conditions 5,6,[18][19][20][21][22][23][24][25] that play an important role in the species transport of the VRFBs. 26 In the VRFB, one disadvantageous characteristic is the vanadium transport across the membrane, ie, vanadium crossover.…”

Section: Introductionmentioning

confidence: 99%

An optimal electrolyte addition strategy for improving performance of a vanadium redox flow battery

Yang

Deng

et al. 2020

Int J Energy Res

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Summary In this paper, the influences of multistep electrolyte addition strategy on discharge capacity decay of an all vanadium redox flow battery during long cycles were investigated by utilizing a 2‐D, transient mathematical model involving diffusion, convection, and migration mechanisms across the membrane as well as the contact resistance in the battery. Results show that with various multistep electrolyte addition strategies, the discharge capacity decay of the battery can be diminished. An optimal multistep electrolyte addition strategy is presented, which is corresponding to adding 1.04 mol L−1 V3+ electrolyte to a negative tank while adding 1.04 mol L−1 VO2+ electrolyte to a positive tank. Results show that capacity decay of the battery can be debased by 10.8%, which is due to increased vanadium ions in the negative side and the decreased state‐of‐charge (SOC) imbalance between two half‐cells. This study will propose a practical method for mitigating the discharge capacity decay of the battery during operation.

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Investigation of electrolytes of the vanadium redox flow battery (VII): Prediction of the viscosity of mixed electrolyte solution (VOSO4 + H2SO4 + H2O) based on Eyring’s theory

Cited by 13 publications

References 37 publications

A Review of Electrolyte Additives in Vanadium Redox Flow Batteries

A Review of Electrolyte Additives in Vanadium Redox Flow Batteries

Densities and Viscosities of Binary and Ternary Solutions of Triethylenetetramine, 2-Amino-2-methyl-1-propanol, and Water for Carbon Dioxide Capture

An optimal electrolyte addition strategy for improving performance of a vanadium redox flow battery

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Investigation of electrolytes of the vanadium redox flow battery (VII): Prediction of the viscosity of mixed electrolyte solution (VOSO4 + H2SO4 + H2O) based on Eyring’s theory

Cited by 13 publications

References 37 publications

A Review of Electrolyte Additives in Vanadium Redox Flow Batteries

A Review of Electrolyte Additives in Vanadium Redox Flow Batteries

Densities and Viscosities of Binary and Ternary Solutions of Triethylenetetramine, 2-Amino-2-methyl-1-propanol, and Water for Carbon Dioxide Capture

An optimal electrolyte addition strategy for improving performance of a vanadium redox flow battery

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Investigation of electrolytes of the vanadium redox flow battery (VII): Prediction of the viscosity of mixed electrolyte solution (VOSO4 + H2SO4 + H2O) based on Eyring’s theory