Production method and production apparatus of electrode for secondary battery, electrode for secondary battery, and secondary battery
Abstract:
An electrode for a secondary battery including an electrode laminated assembly that has a configuration in which electrodes and a separator are laminated, includes current collector 3 and active material layer 2 formed on a surface of current collector 3. Active material layer 2 includes a thick-layer portion and a thin-layer portion that is positioned at an edge portion of the active material layer and that is smaller in thickness than the thick-layer portion, and is formed by discharging slurry containing an active material from discharge port 12a of die head 12 toward the surface of current collector 3, the slurry being supplied to die head 12 through coating valve 13. At the time of the formation of the thin-layer portion of active material layer 2, the slurry supplied through coating valve 13 having a smaller opening amount than at the time of the formation of the thick-layer portion is discharged toward current collector 3 from discharge port 12a that is closer to current collector 3 than at the time of the formation of the thick-layer portion.
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