Open AccessEstimating the State-of-Charge of all-Vanadium Redox Flow Battery using a Divided, Open-circuit Potentiometric Cell
Author(s) -
Mohd Rusllim Mohamed,
Hamzah Ahmad,
Mazrul Nizam Abu Seman
Publication year - 2013
Publication title -
elektronika ir elektrotechnika
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.224
H-Index - 26
eISSN - 2029-5731
pISSN - 1392-1215
DOI - 10.5755/j01.eee.19.3.1623
Subject(s) - redox , flow battery , vanadium , potentiometric titration , electrolysis , chemistry , electrolyte , analytical chemistry (journal) , open circuit voltage , electrode , state of charge , reference electrode , nernst equation , electrolytic cell , battery (electricity) , inorganic chemistry , thermodynamics , electrical engineering , voltage , physics , chromatography , engineering , power (physics)
In this paper, mathematical modelling of oxidation-reduction redox potential for estimating the state-ofcharge of V-RFB is presented. The estimation is based on the Nernst equation, a mass balance, Faraday’s law of electrolysis, and 1st order kinetic equation. The 25-100 cm2 laboratories, unit cell V-RFB is chosen as a model reaction for electrolyte redox potential measurement. Preliminary experiment is carried out using a 100 cm2 laboratory unit but the estimated value produced is inaccurate. An alternative design of 25 cm2 laboratory, unit cell V-RFB using a divided, open-circuit potentiometric cell is used. The redox potential of V(III)/V(II) and V(IV)/V(V) is measured through combined Hg/Hg2SO4 reference electrode and carbon rod working electrode. The differences between the experimental and estimated values are highlighted