Jelly-Roll Type Electrode Assembly Comprising Positive Electrode Having Pattern-Coated Part and Secondary Battery comprising the same

Provided is a jelly-roll type electrode assembly wound with a separator interposed between a positive electrode and a negative electrode. Provided are an electrode assembly and a secondary battery including the same, wherein the positive electrode includes a core unit and an outer unit. The core uni...

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Bibliographische Detailangaben
Hauptverfasser: KWON TAE HYUN, KIM NAMWON, MIN SEUNGJUN, KIM DUCKHEE, KIM JUNG JIN
Format: Patent
Sprache:eng ; kor
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Zusammenfassung:Provided is a jelly-roll type electrode assembly wound with a separator interposed between a positive electrode and a negative electrode. Provided are an electrode assembly and a secondary battery including the same, wherein the positive electrode includes a core unit and an outer unit. The core unit includes a first positive electrode current collector, a first positive electrode mixture layer positioned on the first positive electrode current collector, and a second positive electrode mixture layer positioned on the first positive electrode mixture layer. The outer unit includes a second positive electrode current collector, and a third positive electrode mixture layer positioned on the second positive electrode current collector. The second positive electrode mixture layer has an applied unit and an uncoated unit. 양극과 음극 사이에 분리막이 개재된 상태로 권취되어 있는 젤리-롤형 전극조립체에 있어서, 상기 양극은 코어부와 외곽부를 포함하고, 상기 코어부는 제 1 양극 집전체, 상기 제 1 양극 집전체 상에 위치하는 제 1 양극 합제층 및 상기 제 1 양극 합제층 상에 위치하는 제 2 양극 합제층을 포함하고, 상기 외곽부는 제 2 양극 집전체, 및 상기 제 2 양극 집전체 상에 위치하는 제 3 양극 합제층을 포함하고, 상기 제 2 양극 합제층은 도포부와 미도포부를 가지는 전극조립체, 및 이를 포함하는 이차전지를 제공한다.