Sk on Co., Ltd.

Jong Hyeok Lee

Chang Mook Hwang

Yoon Ji Jo

Hyun Ji Kim

Na Eun Gil

A cathode for a lithium secondary battery includes a cathode current collector, and a cathode active material layer including a plurality of active material layers sequentially disposed on the cathode current collector which include different types of cathode active material particles from each other. Ddetermined by the present disclosure of an active material layer closest to the cathode current collector among the plurality of active material layers is 0.5 μm or less.

Cathode for lithium secondary battery and lithium secondary battery including the same

The present invention provides an apparatus and a method for evaluating performance of a battery and equipment for transporting the battery. The battery performance evaluation apparatus of the present invention includes: a temperature measurement unit for measuring an aging temperature of the battery; a voltage measurement unit for measuring a first open circuit voltage of the battery at the start of aging and measuring a second open circuit voltage of the battery at the end of aging; and a processor for calculating a delta voltage of a voltage drop using a difference between the first open circuit voltage and the second open circuit voltage measured by the voltage measurement unit, and determining normal or defective of the battery based on the delta voltage calculated using the aging temperature measured by the temperature measurement unit and an aging period between measurement times of the first and second open circuit voltage.

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Daejeon, South Korea

Jong Hyeok Lee