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公开(公告)号：US11728472B2
公开(公告)日：2023-08-15
申请号：US17123963
申请日：2020-12-16
发明人： Masanori Sugimori , Yusuke Fukumoto , Yuji Yokoyama , Nobuhiro Hirano , Yo Kato
CPC分类号： H01M4/364 , H01M4/133 , H01M4/134 , H01M4/366 , H01M10/0525 , H01M2004/021 , H01M2004/027
摘要： A negative electrode for a nonaqueous electrolyte secondary battery, which is an example of embodiments, comprises a negative electrode core body and a negative electrode mixture layer provided on the surface of the negative electrode core body. The negative electrode mixture layer includes graphite and fibrous carbon. The BET specific surface area of the graphite included in the first region is smaller than the BET specific surface area of the graphite included in the second region. In addition, the average length of the fibrous carbon included in the first region is longer than the average length of the fibrous carbon included in the second region.
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公开(公告)号：US20210202933A1
公开(公告)日：2021-07-01
申请号：US17130840
申请日：2020-12-22
发明人： Masanori Sugimori , Yusuke Fukumoto , Yuji Yokoyama , Nobuhiro Hirano , Yo Kato
摘要： A negative electrode for a nonaqueous electrolyte secondary battery comprises a negative electrode core body, and a negative electrode mixture layer. When the range of 40% of the thickness of the negative electrode mixture layer from the surface of the negative electrode mixture layer on the side opposite to the negative electrode core body is defined as a first region and the range of 40% of the thickness of the negative electrode mixture layer from the interface between the negative electrode mixture layer and the negative electrode core body is defined as a second region, the BET specific surface area of the graphite included in the first region is smaller than the BET specific surface area of the graphite included in the second region.
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公开(公告)号：US20210193991A1
公开(公告)日：2021-06-24
申请号：US17123903
申请日：2020-12-16
发明人： Yusuke Fukumoto , Masanori Sugimori , Yuji Yokoyama , Nobuhiro Hirano , Yo Kato
摘要： A negative electrode for a nonaqueous electrolyte secondary battery, which is an example of embodiments, comprises a negative electrode core body and a negative electrode mixture layer provided on the surface of the negative electrode core body. The negative electrode mixture layer includes graphite and fibrous carbon. The BET specific surface area of the graphite included in the first region is smaller than the BET specific surface area of the graphite included in the second region. In addition, the average length of the fibrous carbon included in the second region is longer than the average length of the fibrous carbon included in the first region.
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公开(公告)号：US11721802B2
公开(公告)日：2023-08-08
申请号：US17127098
申请日：2020-12-18
发明人： Yusuke Fukumoto , Masanori Sugimori , Yuji Yokoyama , Nobuhiro Hirano , Yo Kato
CPC分类号： H01M4/364 , H01M4/386 , H01M4/483 , H01M4/587 , H01M10/0525 , H01M2004/021 , H01M2004/027
摘要： A negative electrode for a nonaqueous electrolyte secondary battery comprises a negative electrode core body and a negative electrode mixture layer provided. When the range of 40% of the thickness of the negative electrode mixture layer from the surface of the negative electrode mixture layer is defined as a first region and the range of 40% of the thickness of the negative electrode mixture layer from the surface of the negative electrode core body is defined as a second region, the BET specific surface area of the graphite included in the first region is smaller than that of the graphite included in the second region. The first region includes the multiwalled fibrous carbon more than the single wall fibrous carbon in terms of mass and the second region includes the single wall fibrous carbon more than the multiwalled fibrous carbon in terms of mass.
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公开(公告)号：US20210193992A1
公开(公告)日：2021-06-24
申请号：US17123963
申请日：2020-12-16
发明人： Masanori Sugimori , Yusuke Fukumoto , Yuji Yokoyama , Nobuhiro Hirano , Yo Kato
IPC分类号： H01M4/36 , H01M4/133 , H01M4/134 , H01M10/0525
摘要： A negative electrode for a nonaqueous electrolyte secondary battery, which is an example of embodiments, comprises a negative electrode core body and a negative electrode mixture layer provided on the surface of the negative electrode core body. The negative electrode mixture layer includes graphite and fibrous carbon. The BET specific surface area of the graphite included in the first region is smaller than the BET specific surface area of the graphite included in the second region. In addition, the average length of the fibrous carbon included in the first region is longer than the average length of the fibrous carbon included in the second region.
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公开(公告)号：US11728471B2
公开(公告)日：2023-08-15
申请号：US17123903
申请日：2020-12-16
发明人： Yusuke Fukumoto , Masanori Sugimori , Yuji Yokoyama , Nobuhiro Hirano , Yo Kato
摘要： A negative electrode for a nonaqueous electrolyte secondary battery, which is an example of embodiments, comprises a negative electrode core body and a negative electrode mixture layer provided on the surface of the negative electrode core body. The negative electrode mixture layer includes graphite and fibrous carbon. The BET specific surface area of the graphite included in the first region is smaller than the BET specific surface area of the graphite included in the second region. In addition, the average length of the fibrous carbon included in the second region is longer than the average length of the fibrous carbon included in the first region.
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公开(公告)号：US20210202932A1
公开(公告)日：2021-07-01
申请号：US17127098
申请日：2020-12-18
发明人： Yusuke Fukumoto , Masanori Sugimori , Yuji Yokoyama , Nobuhiro Hirano , Yo Kato
IPC分类号： H01M4/36 , H01M10/0525 , H01M4/587 , H01M4/48 , H01M4/38
摘要： A negative electrode for a nonaqueous electrolyte secondary battery comprises a negative electrode core body and a negative electrode mixture layer provided. When the range of 40% of the thickness of the negative electrode mixture layer from the surface of the negative electrode mixture layer is defined as a first region and the range of 40% of the thickness of the negative electrode mixture layer from the surface of the negative electrode core body is defined as a second region, the BET specific surface area of the graphite included in the first region is smaller than that of the graphite included in the second region. The first region includes the multiwalled fibrous carbon more than the single wall fibrous carbon in terms of mass and the second region includes the single wall fibrous carbon more than the multiwalled fibrous carbon in terms of mass.
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8.发明授权公开(公告)号：US11387459B2
公开(公告)日：2022-07-12
申请号：US16296531
申请日：2019-03-08
发明人： Koji Torita , Takuya Asari , Akihiro Ochiai , Yusuke Fukumoto , Naoyuki Wada
IPC分类号： H01M4/66 , H01M4/70 , H01M10/0525 , H01M10/0587 , H01M4/131 , H01M50/531 , H01M4/02
摘要： A positive electrode includes at least a positive electrode current collector and a positive electrode active material layer. The positive electrode active material layer is formed on a surface of the positive electrode current collector. The positive electrode current collector includes an aluminum foil and a porous film. The porous film covers a surface of the aluminum foil. The porous film contains at least aluminum oxide. The porous film has a thickness not smaller than 10 nm and not greater than 800 nm. The porous film has a dynamic hardness not lower than 5 and not higher than 200.
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公开(公告)号：US10720673B2
公开(公告)日：2020-07-21
申请号：US16167959
申请日：2018-10-23
发明人： Koji Torita , Keiichi Takahashi , Yusuke Fukumoto
IPC分类号： H01M10/42 , H01M10/0525 , H01M4/36 , H01M4/02 , H01M4/131 , H01M4/62 , H01M4/66 , H01M4/505 , H01M4/525
摘要： A non-aqueous electrolyte secondary battery includes at least an electrode composite material layer, an intermediate layer, and an electrode current collector. The intermediate layer is arranged between the electrode composite material layer and the electrode current collector. The intermediate layer contains at least a foaming filler, a resin, and a conductive material. A value calculated by dividing an amount (mass %) of the foaming filler by an amount (mass %) of the resin is not smaller than 1.1 and not greater than 2.8 and a value calculated by dividing an amount (mass %) of the foaming filler by an amount (mass %) of the conductive material is not smaller than 8 and not greater than 14. The intermediate layer has a thickness not smaller than 2 μm and not greater than 7 μm.
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公开(公告)号：US20200083538A1
公开(公告)日：2020-03-12
申请号：US16562892
申请日：2019-09-06
发明人： Koji Torita , Harunari Shimamura , Yusuke Fukumoto
摘要： A non-aqueous electrolyte secondary battery includes at least a positive electrode, a negative electrode, and an electrolyte. The positive electrode includes a positive electrode current collector, an intermediate layer, and a positive electrode active material layer. The intermediate layer is interposed between the positive electrode current collector and the positive electrode active material layer. The intermediate layer contains at least carboxymethylcellulose, a conductive material, and an inorganic filler.
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