Aging Studies of Vanadium Redox Flow Batteries

Noack, Jens; Vorhauser, Lorenz; Pinkwart, Karsten; Tuebke, Jens

doi:10.1149/1.3589916

Cited by 17 publications

(13 citation statements)

References 7 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The in situ monitoring of the impedances of VRFBs has been performed to obtain information about changes in polarization resistance associated with electrode modification, degradation of materials, and optimization of the operating parameters, etc. [118][119][120][121][122][123][124][125][126][127][128]. The measurement of full cell impedance is performed by connecting the terminals of the signal analyzer to the terminals of the cell.…”

Section: Electrochemical Impedance Spectroscopy (Eis)mentioning

confidence: 99%

“…In the case of half-cell measurement, the terminals of the signal analyzer are connected to one of the cell terminals and to the reference electrode. Noack et al [125] conducted the EIS study to investigate the influence on impedance due to changes in the compression of the graphite felt, cell temperature, overcharging, membrane damage, etc.…”

Section: Electrochemical Impedance Spectroscopy (Eis)mentioning

confidence: 99%

See 1 more Smart Citation

In-Situ Tools Used in Vanadium Redox Flow Battery Research—Review

Ghimire¹,

Bhattarai²,

Lim

et al. 2021

Batteries

View full text Add to dashboard Cite

Progress in renewable energy production has directed interest in advanced developments of energy storage systems. The all-vanadium redox flow battery (VRFB) is one of the attractive technologies for large scale energy storage due to its design versatility and scalability, longevity, good round-trip efficiencies, stable capacity and safety. Despite these advantages, the deployment of the vanadium battery has been limited due to vanadium and cell material costs, as well as supply issues. Improving stack power density can lower the cost per kW power output and therefore, intensive research and development is currently ongoing to improve cell performance by increasing electrode activity, reducing cell resistance, improving membrane selectivity and ionic conductivity, etc. In order to evaluate the cell performance arising from this intensive R&D, numerous physical, electrochemical and chemical techniques are employed, which are mostly carried out ex situ, particularly on cell characterizations. However, this approach is unable to provide in-depth insights into the changes within the cell during operation. Therefore, in situ diagnostic tools have been developed to acquire information relating to the design, operating parameters and cell materials during VRFB operation. This paper reviews in situ diagnostic tools used to realize an in-depth insight into the VRFBs. A systematic review of the previous research in the field is presented with the advantages and limitations of each technique being discussed, along with the recommendations to guide researchers to identify the most appropriate technique for specific investigations.

show abstract

Section: Electrochemical Impedance Spectroscopy (Eis)mentioning

confidence: 99%

Section: Electrochemical Impedance Spectroscopy (Eis)mentioning

confidence: 99%

In-Situ Tools Used in Vanadium Redox Flow Battery Research—Review

Ghimire¹,

Bhattarai²,

Lim

et al. 2021

Batteries

View full text Add to dashboard Cite

show abstract

“…A Warburg-like element relative to the boundary layer surrounding carbon fibers Z , WBL whose expression is given in (44).…”

Section: Socmentioning

confidence: 99%

Unravelling the Contribution of Kinetics and Mass Transport Phenomena to Impedance Spectra in Vanadium Redox Flow Batteries: Development and Validation of a 1D Physics-Based Analytical Model

Vivona

Messaggi

Baricci

et al. 2020

J. Electrochem. Soc.

View full text Add to dashboard Cite

Vanadium redox flow battery technology can support the spread of energy storage in stationary applications and allow higher penetration of renewables in the electric grid. Currently, its market competitiveness is hindered by low power density, which stems from complex interplay between kinetic and mass transport losses. The quantitative interpretation of experimental observations should rely on physics-based models, which allow a consistent comparison of different operative conditions. In this work, a fast analytical physics-based 1D model of the impedance of vanadium flow battery is presented and validated with respect to experimental data. The model, made available online at http://mrtfuelcell.polimi.it, employs a macro-homogeneous approach and considers losses due to kinetics, reactant distribution within the electrode (Sigracet® SGL 39 AA carbon paper), convection in flow channel and vanadium transport to electrode surface. Additionally, analytical expressions of contributions to impedance of single physical phenomena are derived through an asymptotical analysis. The results show that, at negative electrode, transport of ions to active surface is the limiting phenomenon at lower flow rates, while at higher flow rates depletion of reactants within electrode becomes critical together with charge transfer processes. At positive electrode, the main contribution to performance loss is the vanadium transport to electrode surface.

show abstract

“…A charge-discharge cell test was performed in a 40 cm 2 cell, which was assembled using a Fumasep FAP-450 anion exchange membrane (FuMa-Tech GmbH, Bietigheim-Bissingen, Germany) as a separator, GFA6 graphite felt (SGL Group, Meitingen, Germany) and FU 4369 graphite bipolar plates (Schunk Kohlenstofftechnik GmbH, Heuchelheim, Germany) were used as electrode and current collector materials, respectively (for details of the cell design, see Noack et al [27]). The felts were pre-treated for one hour at 400 • C in an oven before the cell assembly.…”

Section: Cell Testmentioning

confidence: 99%

Vanadium Electrolyte for All-Vanadium Redox-Flow Batteries: The Effect of the Counter Ion

et al. 2019

Self Cite

View full text Add to dashboard Cite

In this study, 1.6 M vanadium electrolytes in the oxidation forms V(III) and V(V) were prepared from V(IV) in sulfuric (4.7 M total sulphate), V(IV) in hydrochloric (6.1 M total chloride) acids, as well as from 1:1 mol mixture of V(III) and V(IV) (denoted as V3.5+) in hydrochloric (7.6 M total chloride) acid. These electrolyte solutions were investigated in terms of performance in vanadium redox flow battery (VRFB). The half-wave potentials of the V(III)/V(II) and V(V)/V(IV) couples, determined by cyclic voltammetry, and the electronic spectra of V(III) and V(IV) electrolyte samples, are discussed to reveal the effect of electrolyte matrix on charge-discharge behavior of a 40 cm2 cell operated with 1.6 M V3.5+ electrolytes in sulfuric and hydrochloric acids. Provided that the total vanadium concentration and the conductivity of electrolytes are comparable for both acids, respective energy efficiencies of 77% and 72–75% were attained at a current density of 50 mA∙cm−2. All electrolytes in the oxidation state V(V) were examined for chemical stability at room temperature and +45 °C by titrimetric determination of the molar ratio V(V):V(IV) and total vanadium concentration.

show abstract

Aging Studies of Vanadium Redox Flow Batteries

Cited by 17 publications

References 7 publications

In-Situ Tools Used in Vanadium Redox Flow Battery Research—Review

In-Situ Tools Used in Vanadium Redox Flow Battery Research—Review

Unravelling the Contribution of Kinetics and Mass Transport Phenomena to Impedance Spectra in Vanadium Redox Flow Batteries: Development and Validation of a 1D Physics-Based Analytical Model

Vanadium Electrolyte for All-Vanadium Redox-Flow Batteries: The Effect of the Counter Ion

Contact Info

Product

Resources

About