کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1294711 | 973633 | 2008 | 11 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Study of the electro-oxidation of CoO and Co(OH)2 at 90 °C in alkaline medium
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
شیمی
الکتروشیمی
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
Cobalt is usually post-added as CoO or Co(OH)2 to nickel hydroxide at the positive electrode (nickel oxide electrode) of alkaline batteries, to form a conductive network. In the present work, we focus on the transformation of CoO and Co(OH)2 phases when oxidized at 90 °C. The Co3O4 phase is the majority product of such a reaction, with CoOOH as a secondary product. It is shown that the Co3O4 phase results from the reaction of the CoOOH phase, formed by electrochemical oxidation of Co(OH)2, with Co2+ species in the electrolyte, which is made possible by temperature. This process requires a global migration of the cobalt phases towards the current collector.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Power Sources - Volume 179, Issue 2, 1 May 2008, Pages 837–847
Journal: Journal of Power Sources - Volume 179, Issue 2, 1 May 2008, Pages 837–847
نویسندگان
Frédéric Tronel, Liliane Guerlou-Demourgues, Lionel Goubault, Patrick Bernard, Claude Delmas,