JELLY-ROLL TYPE ELECTRODE ASSEMBLY COMPRISING ANODE IN WHICH ANODE MIXTURES COMPRISING ACTIVE MATERIALS OF DIFFERENT COMPOSITIONS ARE FORMED ON BOTH SURFACES OF CURRENT COLLECTOR, SECONDARY BATTERY COMPRISING SAME, AND DEVICE COMPRISING SECONDARY BATTERY

摘要

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.