Species transport mechanisms governing crossover and capacity loss in vanadium redox flow batteries

2021 ◽  
Author(s):  
Ertan Agar
Keyword(s):  
Transport Mechanisms ◽  
Species Transport ◽  
Redox Flow Batteries ◽  
Capacity Loss ◽  
Flow Batteries ◽  
Vanadium Redox

scholarly journals Online Spectroscopic Study on the Positive and the Negative Electrolytes in Vanadium Redox Flow Batteries

2013 ◽  
Vol 2013 ◽  
pp. 1-8 ◽  
Author(s):  
Le Liu ◽  
Jingyu Xi ◽  
Zenghua Wu ◽  
Wenguang Zhang ◽  
Haipeng Zhou ◽  
...  
Keyword(s):  
Chemical Reactions ◽  
Spectroscopic Analysis ◽  
State Of Charge ◽  
Online Detection ◽  
High Concentration ◽  
Chemical Reagents ◽  
Redox Flow Batteries ◽  
Capacity Loss ◽  
Flow Batteries ◽  
Vanadium Redox

Traditional spectroscopic analysis based on the Beer-Lambert law cannot analyze the analyte with high concentration and interference between different compositions, such as the electrolyte in vanadium redox flow batteries (VRBs). Here we propose a new method for online detection of such analytes. We demonstrate experimentally that, by comparing the transmittance spectrum of the analyte with the spectra in a preprepared database using our intensity-corrected correlation coefficient (ICCC) algorithm, parameters such as the state of charge (SOC) of both the positive and the negative electrolytes in the VRB can be online monitored. This method could monitor the level of the electrolytes imbalance in the VRB, which is useful for further rebalancing the electrolyte and restoring the capacity loss of the VRB. The method also has the potential to be used in the online detection of other chemical reactions, in which the chemical reagents have high concentration and interferences between different compositions.

Iron-vanadium redox flow batteries with polybenzimidazole membranes: High coulomb efficiency and low capacity loss

2019 ◽  
Vol 439 ◽  
pp. 227079 ◽  
Author(s):  
Wonmi Lee ◽  
Byeong Wan Kwon ◽  
Mina Jung ◽  
Dmytro Serhiichuk ◽  
Dirk Henkensmeier ◽  
...  
Keyword(s):  
Redox Flow Batteries ◽  
Capacity Loss ◽  
Flow Batteries ◽  
Coulomb Efficiency ◽  
Vanadium Redox

Thermo–chemical treatments based on NH3/O2 for improved graphite-based fiber electrodes in vanadium redox flow batteries

Carbon ◽  
2013 ◽  
Vol 60 ◽  
pp. 280-288 ◽  
Author(s):  
Cristina Flox ◽  
Javier Rubio-García ◽  
Marcel Skoumal ◽  
Teresa Andreu ◽  
Juan Ramón Morante
Keyword(s):  
Chemical Treatments ◽  
Redox Flow Batteries ◽  
Flow Batteries ◽  
Vanadium Redox

Locating Shunt Currents in a Multistack System of All-Vanadium Redox Flow Batteries

2021 ◽  
Author(s):  
Han-Wen Chou ◽  
Feng-Zhi Chang ◽  
Hwa-Jou Wei ◽  
Bhupendra Singh ◽  
Amornchai Arpornwichanop ◽  
...  
Keyword(s):  
Redox Flow Batteries ◽  
Flow Batteries ◽  
Vanadium Redox

scholarly journals Vanadium Redox Flow Batteries: A Review Oriented to Fluid-Dynamic Optimization

Energies ◽  
2020 ◽  
Vol 14 (1) ◽  
pp. 176
Author(s):  
Iñigo Aramendia ◽  
Unai Fernandez-Gamiz ◽  
Adrian Martinez-San-Vicente ◽  
Ekaitz Zulueta ◽  
Jose Manuel Lopez-Guede
Keyword(s):  
Large Scale ◽  
Numerical Models ◽  
Fluid Dynamic ◽  
Renewable Energy Sources ◽  
Vanadium Redox Flow Battery ◽  
Redox Flow Batteries ◽  
Design Flexibility ◽  
Flow Batteries ◽  
Exchange Membrane ◽  
Vanadium Redox

Large-scale energy storage systems (ESS) are nowadays growing in popularity due to the increase in the energy production by renewable energy sources, which in general have a random intermittent nature. Currently, several redox flow batteries have been presented as an alternative of the classical ESS; the scalability, design flexibility and long life cycle of the vanadium redox flow battery (VRFB) have made it to stand out. In a VRFB cell, which consists of two electrodes and an ion exchange membrane, the electrolyte flows through the electrodes where the electrochemical reactions take place. Computational Fluid Dynamics (CFD) simulations are a very powerful tool to develop feasible numerical models to enhance the performance and lifetime of VRFBs. This review aims to present and discuss the numerical models developed in this field and, particularly, to analyze different types of flow fields and patterns that can be found in the literature. The numerical studies presented in this review are a helpful tool to evaluate several key parameters important to optimize the energy systems based on redox flow technologies.

Chloride ions as an electrolyte additive for high performance vanadium redox flow batteries

2021 ◽  
Vol 289 ◽  
pp. 116690
Author(s):  
Z.H. Zhang ◽  
L. Wei ◽  
M.C. Wu ◽  
B.F. Bai ◽  
T.S. Zhao
Keyword(s):  
High Performance ◽  
Chloride Ions ◽  
Electrolyte Additive ◽  
Redox Flow Batteries ◽  
Flow Batteries ◽  
Vanadium Redox
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