Negative Electrode, And Secondary Battery Comprising Same

Abstract: The present invention relates to a negative electrode comprising a negative electrode active material layer including: a negative electrode active material; a binder; a conductive material; and a dispersing agent, wherein the conductive material includes a carbon nanotube structure in which a plurality of single-walled carbon nanotube units are connected side by side, the average length of the carbon nanotube structure is 1 µm to 20 µm, and QBR, according to the following equation 1, is 1 to 1.75. [Equation 1] QBR = Bs/Bf, where Bs is the average value of the number of binders measured in a range extending a distance corresponding to 15% of the total thickness of the negative electrode active material layer from the upper surface of the negative electrode active material layer toward the lower surface of the negative electrode active material layer, and Bf is the average value of the number of binders measured in a range extending a distance corresponding to 15% of the total thickness of the negative electrode active material layer from the lower surface of the negative electrode active material layer toward the upper surface of the negative electrode active material layer.

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