Chemistry: electrical current producing apparatus – product – and – Current producing cell – elements – subcombinations and... – Electrode
Reexamination Certificate
2011-04-26
2011-04-26
Crepeau, Jonathan (Department: 1725)
Chemistry: electrical current producing apparatus, product, and
Current producing cell, elements, subcombinations and...
Electrode
C429S231000, C429S229000, C205S300000, C205S305000
Reexamination Certificate
active
07931988
ABSTRACT:
An improved Ni—Zn cell with a negative electrode substrate plated with tin or tin and zinc during manufacturing has a reduced gassing rate. The copper or brass substrate is electrolytic cleaned, activated, electroplated with a matte surface to a defined thickness range, pasted with zinc oxide electrochemically active material, and baked. The defined plating thickness range of 40-80 μIn maximizes formation of an intermetallic compound Cu3Sn that helps to suppress the copper diffusion from under plating layer to the surface and eliminates formation of an intermetallic compound Cu6Sn5during baking to provide adequate corrosion resistance during battery operation.
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Barton Jeff
Feng Feng
Mohanta Samaresh
Muntasser Zeiad M.
Phillips Jeffrey
Crepeau Jonathan
Douyette Kenneth
Powergenix Systems, Inc.
Weaver Austin Villeneuve & Sampson LLP
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