METHOD FOR MANUFACTURING SECONDARY BATTERY
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United States of America Patent
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Jul 9, 2020
app pub date -
Mar 8, 2018
filing date -
Jul 3, 2017
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Abstract
An object of the present invention is to provide a method for manufacturing a secondary battery with enhanced insulating reliability without degrading the performance of an active material mixture layer formed on an electrode. The present invention provides a method for manufacturing a prismatic secondary battery (100) including a negative electrode (41) having a negative electrode current-collecting foil (411), a negative electrode mixture layer (412) formed thereon, and an insulating layer (413) formed on the negative electrode mixture layer (412). The method of the present invention includes a step of forming the negative electrode mixture layer (412) and the insulating layer (413) by concurrently applying an active material mixture slurry and an insulating layer dispersion liquid to the negative electrode current-collecting foil (411). Each ceramic particle (413a) has a plate shape with an aspect ratio greater than or equal to 2.0 and less than or equal to 5.0. The particle size of each mixture particle (412a) is greater than the length of the long side of each ceramic particle (413a).
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