| abstract |
The present invention provides an electrode assembly and a lithium secondary battery including the same, the electrode assembly includes: one or more first electrodes including a positive electrode; one or more second electrodes including a negative electrode; and a separator sheet, the A separator sheet is used to separate the alternately laminated first electrodes from the second electrodes and is configured to have a plurality of folded portions, wherein the separator sheet comprises: a first porous polymer substrate; a first coating formed on one surface of the first porous polymer substrate and comprising a polymer binder, the first coating facing the positive electrode; and a first coating formed on the first porous polymer A second coating on the other surface of the substrate and comprising a mixture of polymeric binder and inorganic particles, the second coating facing the negative electrode, and the composition, thickness and porosity of the second coating is the same as The first porous coating is different. The electrode assembly of the present invention can enhance mechanical properties and ultimately improve battery safety. |