Lg Energy Solution, Ltd.

Jaekyo Noh

Kwan Soo Lee

Seongmo Koo

The present disclosure relates to a jelly-roll type electrode assembly in which a long sheet-type cathode and a long sheet-type anode are wound in a state where a separator is interposed between the cathode and the anode, wherein the anode is configured such that an anode mixture is formed on both sides of an anode current collector, and the anode current collector is configured such that when winding to form an electrode assembly, if a side that winds inward is referred to a first side and a side that winds outward is referred to a second side, an active material of a first anode mixture coated on the first side contains 70 wt % or more artificial graphite as an active material based on the total weight of the active material, and an active material of a second anode mixture coated on the second side contains 70 wt % or more natural graphite as an active material based on the total weight of the active material.

Jelly-roll type electrode assembly having anode in which anode mixtures containing active material with different composition are formed on both sides of electrode current collector, secondary battery comprising the same, and device comprising secondary battery

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Daejeon, South Korea

Jaekyo Noh