公开(公告)号：US11145865B2

公开(公告)日：2021-10-12

申请号：US16255025

申请日：2019-01-23

申请人： SANYO Electric Co., Ltd.

发明人： Naoki Uchida ,  Ayumi Kochi ,  Haruya Nakai

IPC分类号： H01M10/0525 ,  H01M4/04 ,  H01M4/587 ,  H01M4/62

摘要： A nonaqueous electrolyte secondary battery includes a first electrode plate including a core plate and an active material layer including an active material and a binder, and disposed on a surface of the core plate; a second electrode plate; and a nonaqueous electrolyte. When the surface of the active material layer in contact with the core plate is taken as zero point, the amount of the binder in a 0%-10% thickness region X is 8.5 to 9.5 mass % of the total amount of the binder in the active material layer, the amount of the binder in a 90%-100% thickness region Y is 9.5 to 11.5 mass % of the total amount of the binder in the active material layer, and a binder-richest portion across the thickness of the active material layer resides in a 55%-100% thickness region across the thickness of the active material layer.

公开(公告)号：US20200075958A1

公开(公告)日：2020-03-05

申请号：US16550689

申请日：2019-08-26

申请人： SANYO Electric Co., Ltd.

发明人： Naoki Uchida ,  Haruya Nakai ,  Ayumi Kochi

IPC分类号： H01M4/62 ,  H01M4/04 ,  H01M4/133 ,  H01M4/1393 ,  H01M4/36 ,  H01M4/587 ,  H01M10/0525

摘要： A nonaqueous electrolyte secondary battery according to an embodiment of the present disclosure includes a negative electrode including a negative electrode core and negative electrode mixture layers formed on both surfaces of the negative electrode core. Each of the negative electrode mixture layers contains a cellulose-based binder composed of at least one of carboxymethyl cellulose and a salt thereof. When each of the negative electrode mixture layers is divided in half, at the center in the thickness direction, into a first region near the negative electrode core and a second region far from the negative electrode core, the content of the cellulose-based binder present in the first region is 35% by mass or more and less than 50% by mass of the total mass of the cellulose-based binder contained in the entire of each of the negative electrode mixture layers.

公开(公告)号：US11081700B2

公开(公告)日：2021-08-03

申请号：US16550689

申请日：2019-08-26

申请人： SANYO Electric Co., Ltd.

发明人： Naoki Uchida ,  Haruya Nakai ,  Ayumi Kochi

IPC分类号： H01M4/62 ,  H01M10/0525 ,  H01M4/04 ,  H01M4/133 ,  H01M4/1393 ,  H01M4/36 ,  H01M4/587 ,  H01M4/02

摘要： A nonaqueous electrolyte secondary battery according to an embodiment of the present disclosure includes a negative electrode including a negative electrode core and negative electrode mixture layers formed on both surfaces of the negative electrode core. Each of the negative electrode mixture layers contains a cellulose-based binder composed of at least one of carboxymethyl cellulose and a salt thereof. When each of the negative electrode mixture layers is divided in half, at the center in the thickness direction, into a first region near the negative electrode core and a second region far from the negative electrode core, the content of the cellulose-based binder present in the first region is 35% by mass or more and less than 50% by mass of the total mass of the cellulose-based binder contained in the entire of each of the negative electrode mixture layers.

公开(公告)号：US20190288287A1

公开(公告)日：2019-09-19

申请号：US16255025

申请日：2019-01-23

申请人： SANYO Electric Co., Ltd.

发明人： Naoki Uchida ,  Ayumi Kochi ,  Haruya Nakai

IPC分类号： H01M4/62 ,  H01M4/587 ,  H01M4/04 ,  H01M10/0525

摘要： A nonaqueous electrolyte secondary battery includes a first electrode plate including a core plate and an active material layer including an active material and a binder, and disposed on a surface of the core plate; a second electrode plate; and a nonaqueous electrolyte. When the surface of the active material layer in contact with the core plate is taken as zero point, the amount of the binder in a 0%-10% thickness region X is 8.5 to 9.5 mass % of the total amount of the binder in the active material layer, the amount of the binder in a 90%-100% thickness region Y is 9.5 to 11.5 mass % of the total amount of the binder in the active material layer, and a binder-richest portion across the thickness of the active material layer resides in a 55%-100% thickness region across the thickness of the active material layer.