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公开(公告)号：US20230135592A1
公开(公告)日：2023-05-04
申请号：US17912708
申请日：2021-02-08
发明人： Hidemasa Kawai , Naoki Uchida , Haruya Nakai
IPC分类号： H01M4/36 , H01M4/134 , H01M50/406
摘要： This electrode plate for a secondary battery comprises a thin plate-shaped core formed from a metal foil and an active material layer formed on at least one surface of the core. A melted section of the metal foil forming the core is scattered at an end section of the electrode plate for a secondary battery so as to spread from the plate thickness range of the core to the end face of the active material layer, adheres thereto, and is solidified.
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公开(公告)号：US11145865B2
公开(公告)日：2021-10-12
申请号：US16255025
申请日：2019-01-23
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.
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3.发明申请公开(公告)号：US20200075958A1
公开(公告)日：2020-03-05
申请号：US16550689
申请日：2019-08-26
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.
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公开(公告)号：US20190267618A1
公开(公告)日：2019-08-29
申请号：US16255002
申请日：2019-01-23
IPC分类号： H01M4/36 , H01M4/587 , H01M4/62 , H01M10/056 , H01M10/0525
摘要： In a non-aqueous electrolyte secondary battery including a positive electrode: a negative electrode; and a non-aqueous electrolyte, the negative electrode contains: coated graphite particles in each of which a first amorphous carbon and a second amorphous carbon having a higher electrical conductivity than that of the first amorphous carbon are fixed to a surface of a graphite particle; and a carboxymethyl cellulose having a weight average molecular weight of 3.7×105 to 4.3×105 or its salt. The non-aqueous electrolyte contains a difluorophosphate and a lithium salt which converts an oxalato complex to an anion.
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公开(公告)号：US11081700B2
公开(公告)日：2021-08-03
申请号：US16550689
申请日：2019-08-26
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.
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公开(公告)号：US20190288287A1
公开(公告)日：2019-09-19
申请号：US16255025
申请日：2019-01-23
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.
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