The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Nov. 06, 2007
Filed:
Nov. 01, 2004
Xiaoge Gregory Zhang, Toronto, CA;
Xiaoge Gregory Zhang, Toronto, CA;
Teck Cominco Metals Ltd., Vancouver, BC, CA;
Abstract
A solid porous zinc electrode for use in alkaline-zinc batteries, zinc-air batteries and fuel cells is provided which comprises specific zinc filaments, fibers, threads or strands compressed into a physically-stable wooly mass to form the electrode with a controlled geometrical shape and porosity distribution. Differential densification incorporates ribs, borders, grids or tabs for good structural integrity, mechanical strength, electrochemical behavior, and electrical conductivity. Pressing in a mold or rolling of a compressed sheet can also provide an anode with a large anode/cathode interface area and a complex geometry. The filaments of controlled dimension and composition are preferably made by spin forming from molten zinc alloys. Such anodes are not susceptible to breakage, have a long storage life and can be used in high rate discharge applications.