Arrhenius Variation of Precipitation Time for V<SUP>V</SUP> in Vanadium Flow Batteries

Daniela Oboroceanu; Nathan Quill; Catherine Lenihan; Deirdre Ni Eidhin; Sergiu Albu; Robert P. Lynch; D. Noel Buckley

doi:10.1149/07518.0049ECST

Arrhenius Variation of Precipitation Time for V<SUP>V</SUP> in Vanadium Flow Batteries

Daniela Oboroceanu, Nathan Quill, Catherine Lenihan, Deirdre Ni Eidhin, Sergiu Albu, Robert P. Lynch, D. Noel Buckley

Department of Physics

Research output: Contribution to journal › Article › peer-review

Abstract

Both visual observation and light-scattering measurements were used to investigate the stability of typical vanadium flow battery (VFB) catholytes. V2O5 precipitates after an induction time that decreases with increasing temperature and concentration of Vv and increases with concentration of sulphate. This was observed at 30- 60°C for Vv and sulphate concentrations of 1.4-2.11 and 3.7-5.3 mol dm"3, respectively. Arrhenius plots of induction time show excellent linearity and the logarithm of induction time varies linearly with both sulphate and Vv concentration. An Arrhenius plot of induction times normalized to standard reference concentrations of sulphate and Vv for all solutions gave a good straight line. The activation energy estimated from the slope is E# = 1.79 eV. Combining the Arrhenius Equation and the observed variation with sulphate and Vv concentrations, an equation was derived which enables us to simulate the induction time for any catholyte solution at any temperature in the range investigated.

Original language	Undefined/Unknown
Pages (from-to)	49-63
Number of pages	15
Journal	ECS Transactions
Issue number	18
DOIs	https://doi.org/10.1149/07518.0049ECST
Publication status	Published - 2016

Access to Document

10.1149/07518.0049ECST

Cite this

@article{8a712476eb24406eb58ffda485fd89b5,

title = "Arrhenius Variation of Precipitation Time for VV in Vanadium Flow Batteries",

abstract = "Both visual observation and light-scattering measurements were used to investigate the stability of typical vanadium flow battery (VFB) catholytes. V2O5 precipitates after an induction time that decreases with increasing temperature and concentration of Vv and increases with concentration of sulphate. This was observed at 30- 60°C for Vv and sulphate concentrations of 1.4-2.11 and 3.7-5.3 mol dm{"}3, respectively. Arrhenius plots of induction time show excellent linearity and the logarithm of induction time varies linearly with both sulphate and Vv concentration. An Arrhenius plot of induction times normalized to standard reference concentrations of sulphate and Vv for all solutions gave a good straight line. The activation energy estimated from the slope is E# = 1.79 eV. Combining the Arrhenius Equation and the observed variation with sulphate and Vv concentrations, an equation was derived which enables us to simulate the induction time for any catholyte solution at any temperature in the range investigated.",

author = "Daniela Oboroceanu and Nathan Quill and Catherine Lenihan and Eidhin, {Deirdre Ni} and Sergiu Albu and Lynch, {Robert P.} and Buckley, {D. Noel}",

year = "2016",

doi = "10.1149/07518.0049ECST",

language = "Undefined/Unknown",

pages = "49--63",

journal = "ECS Transactions",

issn = "1938-5862",

number = "18",

}

TY - JOUR

T1 - Arrhenius Variation of Precipitation Time for VV in Vanadium Flow Batteries

AU - Oboroceanu, Daniela

AU - Quill, Nathan

AU - Lenihan, Catherine

AU - Eidhin, Deirdre Ni

AU - Albu, Sergiu

AU - Lynch, Robert P.

AU - Buckley, D. Noel

PY - 2016

Y1 - 2016

N2 - Both visual observation and light-scattering measurements were used to investigate the stability of typical vanadium flow battery (VFB) catholytes. V2O5 precipitates after an induction time that decreases with increasing temperature and concentration of Vv and increases with concentration of sulphate. This was observed at 30- 60°C for Vv and sulphate concentrations of 1.4-2.11 and 3.7-5.3 mol dm"3, respectively. Arrhenius plots of induction time show excellent linearity and the logarithm of induction time varies linearly with both sulphate and Vv concentration. An Arrhenius plot of induction times normalized to standard reference concentrations of sulphate and Vv for all solutions gave a good straight line. The activation energy estimated from the slope is E# = 1.79 eV. Combining the Arrhenius Equation and the observed variation with sulphate and Vv concentrations, an equation was derived which enables us to simulate the induction time for any catholyte solution at any temperature in the range investigated.

AB - Both visual observation and light-scattering measurements were used to investigate the stability of typical vanadium flow battery (VFB) catholytes. V2O5 precipitates after an induction time that decreases with increasing temperature and concentration of Vv and increases with concentration of sulphate. This was observed at 30- 60°C for Vv and sulphate concentrations of 1.4-2.11 and 3.7-5.3 mol dm"3, respectively. Arrhenius plots of induction time show excellent linearity and the logarithm of induction time varies linearly with both sulphate and Vv concentration. An Arrhenius plot of induction times normalized to standard reference concentrations of sulphate and Vv for all solutions gave a good straight line. The activation energy estimated from the slope is E# = 1.79 eV. Combining the Arrhenius Equation and the observed variation with sulphate and Vv concentrations, an equation was derived which enables us to simulate the induction time for any catholyte solution at any temperature in the range investigated.

UR - https://publons.com/wos-op/publon/39561112/

U2 - 10.1149/07518.0049ECST

DO - 10.1149/07518.0049ECST

M3 - Article

SN - 1938-5862

SP - 49

EP - 63

JO - ECS Transactions

JF - ECS Transactions

IS - 18

ER -

Arrhenius Variation of Precipitation Time for V<SUP>V</SUP> in Vanadium Flow Batteries

Abstract

Access to Document

Other files and links

Cite this