High performance zinc anode for battery applications
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United States of America Patent
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Jul 14, 1998
Grant Date -
N/A
app pub date -
May 9, 1996
filing date -
May 9, 1996
priority date (Note) -
Expired
status (Latency Note)
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Abstract
An improved zinc anode for use in a high density rechargeable alkaline battery is disclosed. A process for making the zinc electrode comprises electrolytic loading of the zinc active material from a slightly acidic zinc nitrate solution into a substrate of nickel, copper or silver. The substrate comprises a sintered plaque having very fine pores, a high surface area, and 80-85 percent total initial porosity. The residual porosity after zinc loading is approximately 25-30%. The electrode of the present invention exhibits reduced zinc mobility, shape change and distortion, and demonstrates reduced dendrite buildup during cycling of the battery. The disclosed battery is useful for applications requiring high energy density and multiple charge capability.
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