High discharge rate electrodeposited zinc electrode for use in alkaline microbattery

Nor Hairin, Assayidatul Laila and Othman, Raihan and Ani, Mohd Hanafi and Saputra, Hens (2011) High discharge rate electrodeposited zinc electrode for use in alkaline microbattery. IIUM Engineering Journal, 12 (5). pp. 115-122. ISSN 1511-788X

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Abstract

High discharge rate zinc electrode is prepared using the electrodeposition process. The electrolytic bath consists of zinc chloride as the metal source and ammonium chloride as the supporting electrolyte. The concentration of the supporting electrolyte is varied from zero until 4 M, while the concentration of zinc chloride is fixed at 2 M. The aim is to produce a porous zinc coating with an enhanced and intimate interfacial area per unit volume. These characteristics shall contribute towards reduced ohmic losses, improved active material utilization, and subsequently producing high rate capacity electrochemical cell. Nitrogen physisorption at 77 K is used to measure the BET surface area and pore volume density of the zinc electrodeposits. The electrodeposited zinc electrodes are then fabricated into alkaline zinc-air microbattery measuring 1 cm2 area x ca. 305 μm thick. The use of inorganic MCM-41 membrane separator enables the fabrication of a compact cell design. The quality of the electrodeposited zinc electrodes is gauged directly from the electrochemical performance of zinc-air cell. Zinc electrodeposits prepared from electrolytic bath of 2 M NH4Cl produces the highest discharge capacity.

Item Type:	Article (Journal)
Additional Information:	2593/14628
Uncontrolled Keywords:	zinc electrodeposition; high discharge rate electrode; MCM-41 separator; zinc-air cell; alkaline microbattery
Subjects:	T Technology > TJ Mechanical engineering and machinery > TJ807 Renewable energy sources T Technology > TK Electrical engineering. Electronics Nuclear engineering > TK2896 Production of electricity by direct energy conversion T Technology > TP Chemical technology > TP250 Industrial electrochemistry
Kulliyyahs/Centres/Divisions/Institutes (Can select more than one option. Press CONTROL button):	Kulliyyah of Engineering > Department of Electrical and Computer Engineering Kulliyyah of Engineering > Department of Manufacturing and Materials Engineering Kulliyyah of Engineering > Department of Science
Depositing User:	Raihan Othman
Date Deposited:	12 Jan 2012 22:15
Last Modified:	01 Feb 2019 10:33
URI:	http://irep.iium.edu.my/id/eprint/14628

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