公开(公告)号：US11929503B2

公开(公告)日：2024-03-12

申请号：US17400180

申请日：2021-08-12

申请人： Prime Planet Energy & Solutions, Inc.

发明人： Yuji Yamamoto

IPC分类号： H01M4/583 ,  H01M4/36 ,  H01M4/64 ,  H01M10/02 ,  H01M4/02

CPC分类号： H01M4/583 ,  H01M4/366 ,  H01M4/64 ,  H01M10/02 ,  H01M2004/028

摘要： Provided is a positive electrode for a secondary battery in which carbon nanotubes are used, of which an initial resistance is small, and that suppresses an increase in resistance when charging and discharging are repeated. The positive electrode for a secondary battery disclosed herein includes a positive-electrode current collector and a positive-electrode active material layer provided on the positive-electrode current collector. The positive-electrode active material layer contains a positive-electrode active material and carbon nanotubes, and substantially does not contain a resin binder. The positive-electrode active material layer includes a layer-like region that is in contact with the positive-electrode current collector, and a region other than the layer-like region. Both of the layer-like region and the region other than the layer-like region contain carbon nanotubes. A content of carbon nanotubes in the layer-like region is larger than a content of carbon nanotubes in the region other than the layer-like region.