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公开(公告)号：US20240396018A1
公开(公告)日：2024-11-28
申请号：US18695164
申请日：2022-09-02
Inventor： Akihiro Taniguchi , Motohiro Sakata , Kaoru Inoue , Kensuke Nakura
Abstract: A negative electrode for secondary batteries according to one embodiment of the present disclosure comprises a negative electrode collector and a negative electrode mixture layer that is arranged on the negative electrode collector. This negative electrode for secondary batteries is characterized in that: the negative electrode mixture layer comprises a negative electrode active material that contains a carbon material and an Si-based material; the negative electrode mixture layer internally has a plurality of voids; the pore size distribution of the negative electrode mixture layer as determined by a mercury intrusion method has two peak values R1 and R2; and the plurality of voids have an aspect ratio of 2 or more, the aspect ratio being obtained by dividing the length in the major axis direction by the length in the minor axis direction.
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2.发明公开公开(公告)号：US20240204166A1
公开(公告)日：2024-06-20
申请号：US18556013
申请日：2022-04-12
Inventor： Akihiro Taniguchi , Motohiro Sakata , Kaoru Inoue , Kensuke Nakura
IPC: H01M4/133 , H01M4/02 , H01M4/04 , H01M4/134 , H01M4/1393 , H01M4/1395
CPC classification number: H01M4/133 , H01M4/0404 , H01M4/134 , H01M4/1393 , H01M4/1395 , H01M2004/021 , H01M2004/027
Abstract: A negative electrode for a secondary battery according to one aspect of the present disclosure is characterized by comprising a negative electrode current collector and a negative electrode mixture layer disposed on the negative electrode current collector, and is characterized in that: the negative electrode mixture layer contains a negative electrode active material including a carbon material and a Si-based material; a pore diameter distribution of the negative electrode mixture layer as measured by a mercury press-in method has two peak values R1 and R2; the peak value R1 is in the range of 0.5-1.5 μm; the peak value R2 is in the range of 2-10 μm; an average particle diameter of the Si-based material is 4 μm or more; and the contained amount of the Si-based material with respect to the total amount of the negative electrode active material is 30 mass % or more.
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公开(公告)号：US20240088352A1
公开(公告)日：2024-03-14
申请号：US18273902
申请日：2022-01-24
Inventor： Kaoru Inoue , Motohiro Sakata , Akihiro Taniguchi
Abstract: Provided is a negative electrode active material for secondary batteries that is capable of inhibiting negative electrode swelling and the decline of the charge/discharge cycle characteristics of a battery. A negative electrode active material for secondary batteries according to the present disclosure is characterized by including a Si-based material, activated carbon, and a conductive material, and in that the Si-based material and the conductive material are carried in pores of the activated carbon.
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4.发明公开公开(公告)号：US20240055583A1
公开(公告)日：2024-02-15
申请号：US18267249
申请日：2021-12-24
Inventor： Kaoru Inoue , Yosuke Sato , Kensuke Nakura , Akihiro Taniguchi
CPC classification number: H01M4/366 , H01M4/587 , H01M4/5825 , H01M4/133 , H01M4/131 , H01M2004/027
Abstract: A negative electrode for a nonaqueous electrolyte secondary battery, according to one embodiment of the present invention, is provided with a negative electrode core and a negative electrode mixture layer provided on the surface of the negative electrode core. The negative electrode mixture layer has a first layer that includes: at least one of at least one kind of metal element selected from Si, Sn, Sb, Mg, and Ge, and a compound containing said metal element; at least one of multi-walled carbon nanotubes and single-walled carbon nanotubes; and a binding agent. The negative electrode mixture layer also has a second layer that includes graphite A with a particle fracture strength of 10-35 MPa. The porosity of the first layer is preferably 50-65%.
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