Aqueous Slurry For Battery Electrodes
A slurry or paste for the manufacture of electrodes for secondary batteries such as lithium ion containing electrochemical cells. The slurry comprises a water based binder with CMC, SBR and PVDF as binder materials.
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10 . A method for the manufacture of an electrode for use in an electrochemical cell, the method comprising:
preparing a slurry comprising a combination of at least three of polyacylic acid (PAA), carboxymethyl cellulose (CMC), styrene-butadiene rubber (SBR) and polyvinylidene fluoride (PVDF) as binder in an aqueous solution,
coating or laminating the slurry on a current collector.
11 . The method of claim 10 , wherein preparing the slurry comprises dispersing latex in the aqueous solution for stabilizing the aqueous solution.
12 . The method of claim 10 , further comprising adding a non-aqueous electrolyte.
13 . The method of claim 10 , wherein the concentration of each one of the at least three of the polyacrylic acid (PAA), the carboxymethyl cellulose, the styrene-butadiene rubber and the polyvinylidene fluoride is about 0.5% to about 10% by weight.
14 . The method of claim 10 , further comprising drying the slurry.