Method for producing paste for production of negative electrodes, method for producing negative electrode for lithium ion secondary batteries, negative electrode for lithium secondary batteries, and lithium ion secondary battery
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United States of America Patent
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Jun 30, 2020
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Nov 16, 2017
app pub date -
Dec 17, 2015
filing date -
Dec 24, 2014
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Abstract
A method of producing a paste for production of a negative electrode of a lithium ion secondary battery, which includes a negative electrode active material, a thickening agent, and an aqueous binder. The method includes preparing a mixture containing the negative electrode active material and the thickening agent by dry mixing the negative electrode active material and the thickening agent in a powder state under reduced pressure; preparing a paste precursor by adding one or two or more kinds of liquid components selected from an aqueous medium and an emulsion aqueous solution containing the aqueous binder to the mixture and wet mixing the mixture; and preparing the paste for production of a negative electrode by further adding one or two or more kinds of liquid components selected from the aqueous medium and the emulsion aqueous solution containing the aqueous binder to the paste precursor and wet mixing the mixture.
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