RT info:eu-repo/semantics/article
T1 Revisiting the cycling stability of ferrocyanide in alkaline media for redox flow batteries
A1 Páez, Teresa
A1 Martínez Cuezva, Alberto
A1 Palma, Jesús
A1 Ventosa Arbaizar, Edgar
K1 Redox flow batteries
K1 Electrochemistry
K1 Stability
K1 Ferrocyanide
K1 Alkaline media
K1 Química analítica
K1 Chemistry, Analytic
AB In the quest for searching for new redox-flow battery chemistries, cycling stability must be carefully evaluated since it is one of the most important parameters of new active species. However, it is challenging to elucidate the intrinsic stability during operation of a redox flow battery. The symmetrical flow battery cell is a powerful tool that helps to unambiguously determine the cycling stability. Herein, trustworthiness of this technique is critically re-evaluated. Potassium ferrocyanide in alkaline media is used as a case study since i) it is the best performing species for the catholyte of alkaline flow batteries in terms of reversibility, solubility, costs and environmental compatibility and ii) the cycling stability of this species is still under strong debate. Potassium ferrocyanide is found to be stable at pH 14 upon electrochemical cycling when the oxygen evolution reaction is prevented, which should encourage researchers to resume the use of this species. The results also reveal that care should be taken when interpreting results from this powerful technique to avoid misleading conclusions.
PB Elsevier
SN 0378-7753
YR 2020
FD 2020-09
LK http://hdl.handle.net/10259/5824
UL http://hdl.handle.net/10259/5824
LA spa
NO Spanish Government (MINECO) through the Research Challenges Programme (Grant RTI2018-099228-A-I00) as well as the Comunidad de Madrid through the Talent Attraction Programme (2017-T1/AMB-5190). A. M.-C. thanks Ministerio de Ciencia, Innovación y Universidades and MINECO for the financial support (CTQ2017-87231-P and RYC-2017-22700). E.V. thanks the MINECO for the financial support (RYC2018-026086-I)
DS Repositorio Institucional de la Universidad de Burgos
RD 19-abr-2024