Studies on the development of mossy zinc electrodeposits from flowing alkaline electrolytes

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The initiation and characteristics of mossy zinc electrodeposits have been investigated. Batteries with zinc electrodes are candidates for electric vehicle applications; however, this electrode is prone to form non-compact deposits that contribute to capacity loss and battery failure. Moss is deposited when the current density is far from the limiting current. This morphology first appears only after the bulk deposit is approximately 1 {mu}m thick. In this investigation, the effects of flow rate (Re=0--4000), current density (0--50 mA/cm{sup 2}), concentration of the electroactive species (0.25 and 0.5 M), and the concentration of supporting electrolyte (3, 6, and 12 M) on ... continued below

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Pages: (172 p)

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Mc Vay, L. July 1, 1991.

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Description

The initiation and characteristics of mossy zinc electrodeposits have been investigated. Batteries with zinc electrodes are candidates for electric vehicle applications; however, this electrode is prone to form non-compact deposits that contribute to capacity loss and battery failure. Moss is deposited when the current density is far from the limiting current. This morphology first appears only after the bulk deposit is approximately 1 {mu}m thick. In this investigation, the effects of flow rate (Re=0--4000), current density (0--50 mA/cm{sup 2}), concentration of the electroactive species (0.25 and 0.5 M), and the concentration of supporting electrolyte (3, 6, and 12 M) on the initiation of moss were examined. The rotating concentric cylinder electrode was employed for most of the experiments; and a flow channel was used to study the development of morphology. After the experiment, the deposit was characterized using microscopic, x-ray diffraction, and profilometric techniques. 94 refs., 72 figs.

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Pages: (172 p)

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OSTI; NTIS; GPO Dep.

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  • Other Information: Theses (Ph.D.)

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  • Other: DE92000961
  • Report No.: LBL-30843
  • Grant Number: AC03-76SF00098
  • DOI: 10.2172/5299466 | External Link
  • Office of Scientific & Technical Information Report Number: 5299466
  • Archival Resource Key: ark:/67531/metadc1068605

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  • July 1, 1991

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  • Feb. 4, 2018, 10:51 a.m.

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  • March 1, 2018, 8:10 p.m.

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Mc Vay, L. Studies on the development of mossy zinc electrodeposits from flowing alkaline electrolytes, report, July 1, 1991; United States. (digital.library.unt.edu/ark:/67531/metadc1068605/: accessed April 21, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.