Temperature-Induced Precipitation of V2O5 in Vanadium Flow Batteries—Revisited

Emil Holm Kirk; Filippo Fenini; Sara Noriega Oreiro; Anders Bentien

doi:10.3390/batteries7040087

Temperature-Induced Precipitation of V₂O₅ in Vanadium Flow Batteries—Revisited

Emil Holm Kirk, Filippo Fenini, Sara Noriega Oreiro, Anders Bentien^*

^*Corresponding author for this work

Department of Biological and Chemical Engineering - Process and Materials Engineering

Research output: Contribution to journal/Conference contribution in journal/Contribution to newspaper › Journal article › Research › peer-review

Abstract

The maximum operation temperature of the vanadium solution in vanadium flow batteries is typically limited to 40 ^◦C to prevent the damaging thermal precipitation of V ₂O ₅. Therefore, the operation of batteries at high ambient temperatures is an important aspect to tackle for stationary storage. In the present work, a comprehensive study of the high temperature stability of redox solutions for vanadium flow batteries was performed. In particular, focus was placed on a comparison between batch and in operando precipitation experiments. It was found that, despite being a widely used method in the literature, caution should be taken when assessing the precipitation through capacity fade due to the large influence of external oxidation and cycling parameters, plausibly leading to an incorrect interpretation of the results. The in operando experiments consistently show a precipitation temperature almost 10–20 ^◦C higher than in the batch tests at a 100% state of charge for the same time lapse.

Original language	English
Article number	87
Journal	Batteries
Volume	7
Issue	4
Number of pages	12
ISSN	2313-0105
DOIs	https://doi.org/10.3390/batteries7040087
Publication status	Published - Dec 2021

Keywords

Batch studies
In operando studies
Temperature stability
V O precipitation external oxidation
Vanadium flow batteries

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title = "Temperature-Induced Precipitation of V2O5 in Vanadium Flow Batteries—Revisited",

abstract = "The maximum operation temperature of the vanadium solution in vanadium flow batteries is typically limited to 40 ◦C to prevent the damaging thermal precipitation of V 2O 5. Therefore, the operation of batteries at high ambient temperatures is an important aspect to tackle for stationary storage. In the present work, a comprehensive study of the high temperature stability of redox solutions for vanadium flow batteries was performed. In particular, focus was placed on a comparison between batch and in operando precipitation experiments. It was found that, despite being a widely used method in the literature, caution should be taken when assessing the precipitation through capacity fade due to the large influence of external oxidation and cycling parameters, plausibly leading to an incorrect interpretation of the results. The in operando experiments consistently show a precipitation temperature almost 10–20 ◦C higher than in the batch tests at a 100% state of charge for the same time lapse.",

keywords = "Batch studies, In operando studies, Temperature stability, V O precipitation external oxidation, Vanadium flow batteries",

author = "Kirk, {Emil Holm} and Filippo Fenini and {Noriega Oreiro}, Sara and Anders Bentien",

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AU - Kirk, Emil Holm

AU - Fenini, Filippo

AU - Noriega Oreiro, Sara

AU - Bentien, Anders

PY - 2021/12

Y1 - 2021/12

N2 - The maximum operation temperature of the vanadium solution in vanadium flow batteries is typically limited to 40 ◦C to prevent the damaging thermal precipitation of V 2O 5. Therefore, the operation of batteries at high ambient temperatures is an important aspect to tackle for stationary storage. In the present work, a comprehensive study of the high temperature stability of redox solutions for vanadium flow batteries was performed. In particular, focus was placed on a comparison between batch and in operando precipitation experiments. It was found that, despite being a widely used method in the literature, caution should be taken when assessing the precipitation through capacity fade due to the large influence of external oxidation and cycling parameters, plausibly leading to an incorrect interpretation of the results. The in operando experiments consistently show a precipitation temperature almost 10–20 ◦C higher than in the batch tests at a 100% state of charge for the same time lapse.

AB - The maximum operation temperature of the vanadium solution in vanadium flow batteries is typically limited to 40 ◦C to prevent the damaging thermal precipitation of V 2O 5. Therefore, the operation of batteries at high ambient temperatures is an important aspect to tackle for stationary storage. In the present work, a comprehensive study of the high temperature stability of redox solutions for vanadium flow batteries was performed. In particular, focus was placed on a comparison between batch and in operando precipitation experiments. It was found that, despite being a widely used method in the literature, caution should be taken when assessing the precipitation through capacity fade due to the large influence of external oxidation and cycling parameters, plausibly leading to an incorrect interpretation of the results. The in operando experiments consistently show a precipitation temperature almost 10–20 ◦C higher than in the batch tests at a 100% state of charge for the same time lapse.

KW - Batch studies

KW - In operando studies

KW - Temperature stability

KW - V O precipitation external oxidation

KW - Vanadium flow batteries

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U2 - 10.3390/batteries7040087

DO - 10.3390/batteries7040087

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JF - Batteries

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M1 - 87

ER -

Temperature-Induced Precipitation of V₂O₅ in Vanadium Flow Batteries—Revisited

Abstract

Keywords

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