Publication Type Journal Article
Title In-Situ Localized pH, pNa and Dissolved O-2 Measurements During Charge-Discharge of Mixed Ni-Co Hydroxide Electrodes
Authors Alberto Adan-Mas Maryna Taryba T. M. Silva Liliane Guerlou-Demourgues Maria F. Montemor
Groups CSSE
Journal JOURNAL OF THE ELECTROCHEMICAL SOCIETY
Year 2020
Month April
Volume 167
Number 8
Pages
Abstract This work reports, for the first time, the use of ion-selective localized electrochemical techniques to elucidate the charge-discharge mechanism of nickel-cobalt hydroxide electrodes for electrochemical energy storage. The charge-discharge mechanism of electrodeposited nickel-cobalt hydroxide electrodes was studied in Na2SO4 0.05 M by localized in situ measurements of pH, pNa and dissolved O-2 during cyclic voltammetry. Local pH and pNa distributions were recorded using micro-potentiometric sensors with liquid membrane, while dissolved O-2 was monitored using a fiber-optic microsensor. These original results highlight how localized potentiometry can provide new insights to better understand the charge mechanism of metal (hydr)oxide electrodes by directly measuring the concentrations/activities of relevant species at the electrode-electrolyte interface during charge-discharge. (C) 2020 The Author(s). Published on behalf of The Electrochemical Society by IOP Publishing Limited.
DOI http://dx.doi.org/10.1149/1945-7111/ab8924
ISBN
Publisher
Book Title
ISSN 0013-4651
EISSN 1945-7111
Conference Name
Bibtex ID ISI:000529103900001
Observations
Back to Publications List