Zinc electrode shape change. 1; In situ monitoring
- Eindhoven University of Technology, 5600 MB Eindhoven (NL)
This paper reports on zinc electrode shape change, the redistribution of zinc material over the electrode during repeated cycling, identified as one of the main life-limiting factors for alkaline nickel oxide/zinc secondary batteries. To investigate this phenomenon in situ, a radiotracer, {sup 65}Zn, is incorporated in the battery and its movement monitored during repeated cycling of the battery. The changes in the distribution of {sup 65}Zn over the electrode during battery operation are attributed to the displacement of radioactive zincate ions via the battery electrolyte. It is shown that the spatial distribution of {sup 65}Zn offers a reliable indication for the zinc material distribution over the electrode, provided an electrode with uniformly specific radioactivity is used in the measurements. Radiotracer experiments using zinc electrodes containing 2 weight percent HgO as an additive and uniformly labeled with {sup 203}Hg, have revealed that during battery cycling no substantial net transport of mercury species occurs.
- OSTI ID:
- 6118115
- Journal Information:
- Journal of the Electrochemical Society; (United States), Journal Name: Journal of the Electrochemical Society; (United States) Vol. 138:1; ISSN 0013-4651; ISSN JESOA
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
250902* -- Energy Storage-- Batteries-- Performance & Testing
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400400 -- Electrochemistry
CHALCOGENIDES
CHEMISTRY
ELECTRIC BATTERIES
ELECTROCHEMICAL CELLS
ELECTROCHEMISTRY
ELECTRODES
ELEMENTS
ISOTOPE APPLICATIONS
METAL-METAL OXIDE BATTERIES
METALS
NICKEL COMPOUNDS
NICKEL OXIDES
NICKEL-ZINC BATTERIES
OXIDES
OXYGEN COMPOUNDS
PHASE STUDIES
SHAPE
TRACER TECHNIQUES
TRANSITION ELEMENT COMPOUNDS
ZINC