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Method for manufacturing lithium secondary battery

  • US 8,906,118 B2
  • Filed: 09/14/2012
  • Issued: 12/09/2014
  • Est. Priority Date: 10/06/2011
  • Status: Active Grant
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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