Method for manufacturing lithium secondary battery
First Claim
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1. A method for manufacturing a lithium secondary battery comprising:
- preparing a first slurry by a dispersing treatment where a conductive material of conductive carbon fine particles is dispersed in a solvent;
preparing a second slurry by mixing the first slurry, a positive electrode active material and a binder;
imparting the second slurry on a positive electrode current collector to form a positive electrode mixture layer; and
forming a lithium secondary battery provided with the positive current collector on which the positive electrode mixture layer is formed;
wherein the dispersing treatment is conducted so that a ratio of a particle size at 90% accumulation of the conductive material to a particle size at 10% accumulation of the conductive material is 10 or more and 200 or less, and the particle size at 10% accumulation of the conductive material and the particle size at 90% accumulation of the conductive material are based on a particle size distribution measurement.
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Abstract
A method for manufacturing a lithium secondary battery includes a first step of dispersing a conductive material in a solvent to prepare a conductive slurry; and a second step of mixing the prepared conductive slurry, a positive electrode active material and a binder to prepare a positive electrode mixture layer-forming slurry; wherein the first step is conducted so that a ratio of a particle size at 10% accumulation to a particle size at 90% accumulation, which are based on a particle size distribution measurement of the conductive material, is 10 or more and 200 or less.
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13 Claims
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1. A method for manufacturing a lithium secondary battery comprising:
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preparing a first slurry by a dispersing treatment where a conductive material of conductive carbon fine particles is dispersed in a solvent; preparing a second slurry by mixing the first slurry, a positive electrode active material and a binder; imparting the second slurry on a positive electrode current collector to form a positive electrode mixture layer; and forming a lithium secondary battery provided with the positive current collector on which the positive electrode mixture layer is formed; wherein the dispersing treatment is conducted so that a ratio of a particle size at 90% accumulation of the conductive material to a particle size at 10% accumulation of the conductive material is 10 or more and 200 or less, and the particle size at 10% accumulation of the conductive material and the particle size at 90% accumulation of the conductive material are based on a particle size distribution measurement. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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Specification