| 摘要 |
The present disclosure provides an electrode assembly, comprising one or more first electrodes comprising a cathode; one or more second electrodes comprising an anode; and a separator sheet for separating the first electrodes from the second electrodes and being configured to have multiple folded portions, these electrodes being laminated alternately, wherein the separator sheet comprises a first porous polymer substrate, a first coating layer formed on one surface of the first porous polymer substrate and comprising a polymer binder, the first coating layer being faced with the cathode, and a second coating layer formed on the other surface of the first porous polymer substrate and comprising a mixture a polymer binder and inorganic particles, the second coating layer being faced with the anode and having a composition, a thickness and a porosity different from those of the first porous coating layer, and a lithium secondary battery comprising the electrode assembly. According to the present disclosure, a separator having porous coating layers with a different composition, thickness or porosity formed on each surface thereof is applied and each porous coating layer selectively comes into complete contact with a cathode and an anode to be matched, without any mismatch. |
