ANODE FOR SECONDARY BATTERY, HAVING OPTIMIZED BINDER DISTRIBUTION, AND SECONDARY BATTERY COMPRISING SAME

DRIVE August 27, 2025
Source
The present invention relates to an anode for a non-aqueous electrolyte secondary battery, comprising: an anode current collector; and an anode mixture layer formed on the anode current collector, the anode mixture layer containing an anode active material, a conductor, a rubber-based binder, and a water-soluble polymer-based binder, wherein the anode mixture layer comprises, relative to a total weight thereof, 1.0-2.5 wt% of the rubber-based binder and 0.5-1.5 wt% of the water-soluble polymer based binder, and wherein when the anode mixture layer is divided into ten equal parts in the thickness direction based on the current collector, the ratio (CA) of the content of the rubber-based binder in the section between 0 and 3 to the total content of the rubber-based binder compared to the ratio (CB) of the content of the water-soluble polymer-based binder in the section between 0 and 3 to the total content of the water-soluble polymer-based binder, that is, CA/CB, is more than 1.0, while in the section between 7 to 10, CA/CB is less than 1.0.

Discussion in the ATmosphere

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