Alkali storage cell employing a spongelike metal substrate
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United States of America Patent
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Aug 24, 1999
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N/A
app pub date -
Jun 17, 1997
filing date -
Oct 17, 1995
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Abstract
A belt-shaped spongelike organic high polymer sheet is subjected to stretching forces in the longitudinal and lateral directions so as to transform the approximately spindle-shaped organic high polymer units which compose the organic high polymer sheet. After this, a metal is put into voids inside the organic high polymer sheet. Then, the organic high polymer is eliminated by baking it, and the metal is sintered. As a result, a spongelike metal substrate is completed whose carbon content is 0.5% by weight or less and whose metallic lattices have a longer length/shorter length ratio of 1.7 or below. The spongelike metal substrate is filled with electrode active material to form an electrode, which is combined with a counter electrode and a separator, and coiled in the direction of the longer lengths of the lattices to form a coiled electrode assembly. The electrode assembly is used to manufacture an alkali storage cell.
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