公开(公告)号：EP3319151A4

公开(公告)日：2018-06-27

申请号：EP16873346

申请日：2016-12-08

申请人： LG CHEMICAL LTD

发明人： SEOL JONG HEON ,  LEE MIN HEE ,  KIM DONG KYU ,  KIM JAE WOONG ,  KIM YE LIN ,  CHOY SANG HOON ,  KIM JE YOUNG ,  KIM SUN KYU

IPC分类号： H01M4/13 ,  H01M2/10 ,  H01M4/02 ,  H01M4/505 ,  H01M4/525 ,  H01M4/62 ,  H01M10/052

CPC分类号： H01M10/052 ,  H01M4/13 ,  H01M4/505 ,  H01M4/525 ,  H01M4/62 ,  H01M4/625 ,  H01M2004/021

摘要： Provided herein are a positive electrode for a secondary battery and a secondary battery including the same. The positive electrode includes a positive electrode active material layer including a positive electrode active material, a conductive material, and a dispersant, wherein the conductive material includes bundle-type carbon nanotubes, units of which have an average strand diameter of 15 nm or less, and the positive electrode active material layer has a packing density of 3.0 g/cc or more, and has an average pore diameter of 0.1 µm to 0.5 µm at the packing density when a pore size distribution is measured by mercury intrusion porosimetry, and thus may exhibit excellent electrolyte wetting properties. As a result, when the positive electrode is applied to a battery, wetting time of the positive electrode is shortened, and an area of the positive electrode that is not filled with an electrolyte is reduced, resulting in enhanced battery performance.