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

scholarly journals In situ bulk magnetization measurements reveal the state of charge of redox flow batteries

2022 ◽  
Author(s):  
Evan Wenbo Zhao ◽  
Edward J. K. Shellard ◽  
Peter A.A. Klusener ◽  
Clare P. Grey
Keyword(s):  
Magnetic Susceptibility ◽  
Nmr Spectroscopy ◽  
The State ◽  
State Of Charge ◽  
Magnetic Susceptibility Measurement ◽  
Online Measurement ◽  
Redox Flow Batteries ◽  
Bulk Magnetization ◽  
Flow Batteries

We report two methods, including NMR spectroscopy and direct magnetic susceptibility measurement, for in situ (strictly online) measurement of the state of charge of redox flow batteries. These methods are...

Photometrical Determination of the State-of-Charge in Vanadium Redox Flow Batteries Part I: In Combination with Potentiometric Titration

2019 ◽  
Vol 233 (12) ◽  
pp. 1683-1694 ◽  
Author(s):  
Jan Geiser ◽  
Harald Natter ◽  
Rolf Hempelmann ◽  
Bernd Morgenstern ◽  
Kaspar Hegetschweiler
Keyword(s):  
Potentiometric Titration ◽  
Nir Spectroscopy ◽  
The State ◽  
State Of Charge ◽  
Vanadium Redox Flow Battery ◽  
Absorption Coefficients ◽  
Vanadium Concentration ◽  
Redox Flow Batteries ◽  
Flow Batteries ◽  
Vanadium Redox

AbstractThe stepwise oxidation of vanadium ions in electrolytes, as used in all vanadium redox flow batteries (VRFB), is studied offline by a combination of potentiometric titration and simultaneous UV/Vis/NIR spectroscopy. Eight different total vanadium concentrations between 0.2 mol L−1 and 1.6 mol L−1 have been investigated. The analyte (titrand, V2+ solution) is the anolyte (V2+/V3+ side) of a fully charged laboratory vanadium redox flow battery (VRFB). Absorption maxima are observed at λ = 850 nm for V2+ and at λ = 400 nm for V3+, the corresponding absorption coefficients are determined. In the former case an extrapolation procedure is necessary because during transfer from the VRFB to the titration cell, oxidation to V3+ by ambient oxygen cannot completely be avoided. Based on the knowledge of the absorption coefficients, via simultaneous photometry of V2+ and V3+, the state-of-charge of the anolyte of a VRFB can be determined. In the catholyte (V4+/V5+ side) of a VRFB the formation of an intermediate mixed valence VIV–VV complex at large vanadium concentration prevents a simple photometric SOC determination.

Real-time monitoring of the state of charge (SOC) in vanadium redox-flow batteries using UV–Vis spectroscopy in operando mode

2020 ◽  
Vol 27 ◽  
pp. 101066 ◽  
Author(s):  
Kyung-Hee Shin ◽  
Chang-Soo Jin ◽  
Jae-Young So ◽  
Se-Kook Park ◽  
Dong-Ha Kim ◽  
...  
Keyword(s):  
Real Time ◽  
The State ◽  
State Of Charge ◽  
Real Time Monitoring ◽  
Redox Flow Batteries ◽  
Vis Spectroscopy ◽  
Flow Batteries ◽  
In Operando ◽  
Vanadium Redox

Monitoring the State of Charge of Operating Vanadium Redox Flow Batteries

2019 ◽  
Vol 41 (23) ◽  
pp. 1-9 ◽  
Author(s):  
Zhijiang Tang ◽  
Douglas S. Aaron ◽  
Alexander B. Papandrew ◽  
Thomas A. Zawodzinski
Keyword(s):  
The State ◽  
State Of Charge ◽  
Redox Flow Batteries ◽  
Flow Batteries ◽  
Vanadium Redox

Revealing the structural transformation of rutile RuO2via in situ X-ray absorption spectroscopy during the oxygen evolution reaction

2019 ◽  
Vol 48 (21) ◽  
pp. 7122-7129 ◽  
Author(s):  
Chia-Jui Chang ◽  
You-Chiuan Chu ◽  
Hao-Yu Yan ◽  
Yen-Fa Liao ◽  
Hao Ming Chen
Keyword(s):  
Oxygen Evolution ◽  
Structural Transformation ◽  
Absorption Spectroscopy ◽  
Oxygen Evolution Reaction ◽  
The State ◽  
X Ray ◽  
Alkaline Conditions ◽  
X Ray Absorption ◽  
State Of Art

The state-of-art RuO2 catalyst for the oxygen evolution reaction (OER) is measured by using in situ X-ray absorption spectroscopy (XAS) to elucidate the structural transformation during catalyzing the reaction in acidic and alkaline conditions.

Monitoring the State-of-Charge in All-Iron Aqueous Redox Flow Batteries

2018 ◽  
Vol 165 (13) ◽  
pp. A3164-A3168 ◽  
Author(s):  
Noemí Aguiló-Aguayo ◽  
Thomas Bechtold
Keyword(s):  
The State ◽  
State Of Charge ◽  
Redox Flow Batteries ◽  
Flow Batteries
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