On the Determination of Coulombic Efficiency for Vanadium Redox Flow Batteries: Cutoff Voltage Vs. State of Charge Limits

2013 ◽  
Keyword(s):  
Coulombic Efficiency ◽  
State Of Charge ◽  
Redox Flow Batteries ◽  
Flow Batteries ◽  
Cutoff Voltage ◽  
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.

State of charge monitoring for vanadium redox flow batteries by the transmission spectra of V(IV)/V(V) electrolytes

2012 ◽  
Vol 42 (12) ◽  
pp. 1025-1031 ◽  
Author(s):  
Le Liu ◽  
Jingyu Xi ◽  
Zenghua Wu ◽  
Wenguang Zhang ◽  
Haipeng Zhou ◽  
...  
Keyword(s):  
State Of Charge ◽  
Transmission Spectra ◽  
Redox Flow Batteries ◽  
Flow Batteries ◽  
Vanadium Redox

In Situ X-ray Near-Edge Absorption Spectroscopy Investigation of the State of Charge of All-Vanadium Redox Flow Batteries

2014 ◽  
Vol 6 (20) ◽  
pp. 17920-17925 ◽  
Author(s):  
Chuankun Jia ◽  
Qi Liu ◽  
Cheng-Jun Sun ◽  
Fan Yang ◽  
Yang Ren ◽  
...  
Keyword(s):  
Absorption Spectroscopy ◽  
The State ◽  
State Of Charge ◽  
X Ray ◽  
Edge Absorption ◽  
Redox Flow Batteries ◽  
Flow Batteries ◽  
Vanadium Redox

Determination of Overpotentials in All Vanadium Redox Flow Batteries

2014 ◽  
Vol 58 (37) ◽  
pp. 1-7 ◽  
Author(s):  
J. Langner ◽  
J. Melke ◽  
H. Ehrenberg ◽  
C. Roth
Keyword(s):  
Redox Flow Batteries ◽  
Flow Batteries ◽  
Vanadium Redox
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