Method for manufacturing battery electrode including depositing a liquid phase bilayer

摘要

The present invention provides a method for manufacturing a battery electrode. This method comprises the steps of applying a binder solution 50 that contains a binder 54 and is adjusted so that the contact angle of the binder solution 50 with the surface of a current collector 10 is 73° or less, to form a binder solution layer 56; applying a mixed material paste 40 containing an active material 22 on top of the binder solution layer 56, to deposit both the binder solution layer 56 and a mixed material paste layer 46 on the current collector 10; and obtaining an electrode 30 in which a mixed material layer 20 is formed on the current collector 10, by drying the deposited binder solution layer 56 and mixed material paste layer 46 together.

主权项

1. A method for manufacturing a battery electrode with a configuration in which a mixed material layer containing an active material and a binder is retained on a current collector, the method comprising:
a first step of depositing a first layer of a binder solution in a liquid phase, comprising a binder and a liquid medium, on the current collector, wherein the binder solution is adjusted so that a contact angle of the binder solution with a surface of the current collector is 73° or less; a second step of depositing a second layer of a mixed material paste comprising the active material and a liquid medium on the first layer of the binder solution, thereby forming a liquid phase bilayer, wherein the applied width of the first layer is narrower than the applied width of the second layer and the second layer is deposited so that the applied edge of the second layer protrudes 5 mm or more outwardly beyond the applied edge of the first layer; and a third step of drying the liquid phase bilayer.