In-situ localized pH, pNa and dissolved O2 measurements during charge-discharge of mixed Ni–Co hydroxide electrodes
ADÁN-MÁS, Alberto
Centro de Quimica Estrutural [CQE]
Institut de Chimie de la Matière Condensée de Bordeaux [ICMCB]
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Centro de Quimica Estrutural [CQE]
Institut de Chimie de la Matière Condensée de Bordeaux [ICMCB]
ADÁN-MÁS, Alberto
Centro de Quimica Estrutural [CQE]
Institut de Chimie de la Matière Condensée de Bordeaux [ICMCB]
Centro de Quimica Estrutural [CQE]
Institut de Chimie de la Matière Condensée de Bordeaux [ICMCB]
GUERLOU-DEMOURGUES, Liliane
Réseau sur le stockage électrochimique de l'énergie [RS2E]
Institut de Chimie de la Matière Condensée de Bordeaux [ICMCB]
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Réseau sur le stockage électrochimique de l'énergie [RS2E]
Institut de Chimie de la Matière Condensée de Bordeaux [ICMCB]
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en
Article de revue
Este ítem está publicado en
Journal of The Electrochemical Society. 2020, vol. 167, n° 8, p. 080511
Electrochemical Society
Resumen en inglés
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 ...Leer más >
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 O2 during cyclic voltammetry. Local pH and pNa distributions were recorded using micro-potentiometric sensors with liquid membrane, while dissolved O2 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.< Leer menos
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