| 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 |
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