Carboxymethylcellulose or salt thereof for electrodes of nonaqueous electrolyte secondary battery and aqueous solution thereof
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United States of America Patent
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Jan 19, 2016
Grant Date -
Sep 22, 2011
app pub date -
Nov 26, 2009
filing date -
Nov 26, 2008
priority date (Note) -
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Abstract
The present invention provides carboxymethylcellulose or a salt thereof that can prevent defects such as streaks and pinholes from occurring in the obtained electrode when it is used as a binder for an electrode of a nonaqueous electrolyte secondary battery. The present invention provides carboxymethylcellulose or a salt thereof of which ratio of a dry mass A to a dry mass B is less than 50 ppm when 2 liters of a 0.3 mass % aqueous solution of the dry mass B of the carboxymethylcellulose or a salt thereof is prepared, the entire amount of the aqueous solution is filtrated through a 250-mesh filter under a reduced pressure of −200 mmHg, and the dry mass A of a residue on the filter is measured after filtration. The applications of the carboxymethylcellulose or a salt thereof are also provided.
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