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公开(公告)号:US10044071B2
公开(公告)日:2018-08-07
申请号:US15024068
申请日:2014-06-09
发明人: Sayaka Yonehara , Keisuke Matsumoto , Takashi Honda , Kousuke Hagiyama , Fumihiro Kawamura , Osamu Shimamura , Kazuki Miyatake , Ikuma Matsuzaki , Ryuuta Yamaguchi , Kuniharu Nomoto
IPC分类号: H01M10/42 , H01M10/0585 , H01M10/0525 , H01M10/44 , H01M10/0567
摘要: The present invention provides a non-aqueous electrolyte secondary battery with various improved battery characteristics and a method for manufacturing such a non-aqueous electrolyte secondary battery. In the present invention, the battery manufacturing method includes accommodating and sealing a flat battery element (4) in which a positive electrode plate (41) and a negative electrode plate (42) stacked together via a separator (43), together with a non-aqueous electrolyte including a surplus electrolyte and at least one kind of electrolyte additive, in a laminate film exterior member (5), and then, subjecting the thus-assembled battery (1) to charging operation including at least initial charging in a state where a pressure is applied to a flat surface of the battery element from the outside of the exterior member (5).
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公开(公告)号:US09966605B2
公开(公告)日:2018-05-08
申请号:US14780089
申请日:2014-03-26
发明人: Ryuuta Yamaguchi , Takashi Honda , Kousuke Hagiyama , Ikuma Matsuzaki , Takeshi Miyamoto , Osamu Shimamura , Keisuke Matsumoto
IPC分类号: H01M4/62 , H01M2/18 , H01M4/13 , H01M10/052 , H01M10/04
CPC分类号: H01M4/621 , H01M2/18 , H01M4/13 , H01M10/0481 , H01M10/052 , H01M2220/20 , Y02E60/122 , Y02T10/7011
摘要: A non-aqueous electrolyte secondary battery can efficiently discharge the gas generated to the outside of the electrode and exhibits a low decrease in battery capacity even when used for a long period of time in the case of using an aqueous binder as the binder of a negative electrode active material. The non-aqueous electrolyte secondary battery has a positive electrode active material layer is formed on a surface of a positive electrode current collector, a negative electrode active material layer is formed on a surface of a negative electrode current collector, and a separator, wherein the density of the negative electrode active material layer is from 1.3 to 1.6 g/cm3, the negative electrode active material layer contains an aqueous binder, and the surface center line average roughness (Ra) of a surface on a separator side of the negative electrode active material layer is from 0.5 to 1.0 μm.
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公开(公告)号:US09608261B2
公开(公告)日:2017-03-28
申请号:US14776010
申请日:2014-03-13
发明人: Kenji Ohara , Yoshiaki Nitta , Satoru Ichikawa , Gentaro Kano , Manabu Nishijima , Osamu Shimamura , Fumihiro Kawamura , Kousuke Hagiyama , Shigeo Ibuka , Manabu Kaseda , Masanori Suenaga , Tamaki Hirai , Masahiro Takaya , Kuniharu Nomoto
IPC分类号: H01M2/02 , H01M4/36 , H01M4/505 , H01M4/525 , H01M10/0525 , H01M4/131 , H01M10/0585 , H01M2/16 , H01M4/02
CPC分类号: H01M4/364 , H01M2/0217 , H01M2/0285 , H01M2/16 , H01M4/131 , H01M4/505 , H01M4/525 , H01M10/0525 , H01M10/0585 , H01M2004/021 , H01M2004/028 , H01M2220/20 , Y02E60/122
摘要: [Object] Provided is a means for improving cycle characteristics by suppressing electrode deterioration resulting from non-uniformity of voltage across an electrode plane in a high-capacity and large-area non-aqueous electrolyte secondary battery that includes lithium nickel-based composite oxide as a positive electrode active substance.[Solving Means] Disclosed is a positive electrode for a non-aqueous electrolyte secondary battery used in a non-aqueous electrolyte secondary battery in which the ratio value of battery area (projected area of the battery including the battery outer casing body) to rated capacity is 5 cm2/Ah or more and the rated capacity is 3 Ah or more, the positive electrode comprising a positive electrode current collector and a positive electrode active substance layer that is formed on a surface of the positive electrode current collector and has a positive electrode active substance containing a lithium nickel-based composite oxide and a spinel type lithium manganese composite oxide, in which, when the average secondary particle diameter (D50) of the lithium nickel-based composite oxide is D50(A) [μm], the content ratio of the lithium nickel-based composite oxide in the positive electrode active substance layer is A [% by mass], the average secondary particle diameter (D50) of the spinel type lithium manganese composite oxide is D50(B) [μm], and the content ratio of the spinel type lithium manganese composite oxide in the positive electrode active substance layer is B [% by mass], the positive electrode satisfies the following Mathematical Formula 1 and Mathematical Formula 2: [Math. 1] 0.5≦D50(A)/D50(B)≦2.0 MathematicalFormula1: B/(A+B)≧0.2 MathematicalFormula2:
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公开(公告)号:US20160329613A1
公开(公告)日:2016-11-10
申请号:US15109923
申请日:2014-12-08
IPC分类号: H01M10/44 , H01M10/0567 , H01M4/505 , H01M4/525 , H01M4/131 , H01M4/62 , H01M4/1391 , H01M4/04 , H01M4/66 , H01M4/133 , H01M4/1393 , H01M2/16 , H01M10/0525 , H01M10/0569 , H01M10/0568 , H01M10/0585 , H01M10/42
CPC分类号: H01M10/446 , H01M2/1653 , H01M4/0404 , H01M4/131 , H01M4/133 , H01M4/1391 , H01M4/1393 , H01M4/505 , H01M4/525 , H01M4/622 , H01M4/623 , H01M4/625 , H01M4/661 , H01M10/049 , H01M10/052 , H01M10/0525 , H01M10/0567 , H01M10/0568 , H01M10/0569 , H01M10/058 , H01M10/0585 , H01M10/4235 , H01M10/44 , H01M10/52 , H01M2004/027 , H01M2004/028 , H01M2220/20 , H01M2220/30 , H01M2300/0025 , H01M2300/0037 , Y02T10/7011
摘要: A method for producing a non-aqueous electrolyte secondary battery including an electrolyte containing an electrolyte salt, a non-aqueous solvent capable of dissolving the electrolyte salt, and plural additives, wherein at least one of the additives has a reduction potential that is nobler than the reduction potential of the non-aqueous solvent. The method includes a first charging step for maintaining battery voltage at a negative electrode potential at which the additive having the noblest reduction potential of the additives is decomposed while the non-aqueous solvent and other additives are not reduced and decomposed and a second charging step for maintaining battery voltage so as to have reduction and decomposition of at least one of the non-aqueous solvents and bring the electrical potential of the negative electrode to at least 0.7 V relative to lithium. By having a uniform reaction in an electrode, a decrease in durability is suppressed.
摘要翻译: 一种非水电解质二次电池的制造方法,所述非水电解质二次电池包括含有电解质盐的电解质,能够溶解所述电解质盐的非水溶剂,以及多种添加剂,其中,所述添加剂中的至少一种具有比 非水溶剂的还原电位。 该方法包括:第一充电步骤,用于将电池电压维持在负极电位,在该电位下,添加剂的最高还原电位的添加剂在非水溶剂和其它添加剂不被还原和分解的同时分解,并且第二充电步骤用于 保持电池电压以至少一种非水溶剂的还原和分解,并使负极的电位相对于锂至少为0.7V。 通过在电极中具有均匀的反应,可以抑制耐久性的降低。
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公开(公告)号:US09899674B2
公开(公告)日:2018-02-20
申请号:US14771017
申请日:2014-02-27
发明人: Tamaki Hirai , Manabu Kaseda , Osamu Shimamura , Kenji Ohara , Kousuke Hagiyama , Fumihiro Kawamura , Masanori Aoyagi
IPC分类号: H01M4/131 , H01M4/505 , H01M2/16 , H01M4/525 , H01M10/052 , C01G53/00 , H01M4/36 , H01M10/0525 , H01M4/1391 , H01M4/02
CPC分类号: H01M4/505 , C01G53/006 , C01G53/50 , C01P2002/50 , C01P2002/52 , C01P2004/10 , C01P2004/20 , C01P2004/32 , C01P2004/38 , C01P2004/39 , C01P2004/61 , C01P2004/84 , C01P2006/10 , C01P2006/12 , H01M2/16 , H01M4/131 , H01M4/1391 , H01M4/366 , H01M4/525 , H01M10/052 , H01M10/0525 , H01M2004/021 , H01M2004/028 , Y02T10/7011
摘要: [Object] Provided is a means which is capable, with respect to a non-aqueous electrolyte secondary battery, of suppressing a decrease in capacity when the battery is used for a long period of time, and improving cycle characteristics.[Solving Means] Provided is a positive electrode active substance for a non-aqueous electrolyte secondary battery, the positive electrode active substance being a lithium-nickel-manganese-cobalt composite oxide and having true density of 4.40 to 4.80 g/cm3.
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公开(公告)号:US09716266B2
公开(公告)日:2017-07-25
申请号:US14776270
申请日:2014-03-13
发明人: Kenji Ohara , Yoshiaki Nitta , Satoru Ichikawa , Gentaro Kano , Manabu Nishijima , Osamu Shimamura , Fumihiro Kawamura , Kousuke Hagiyama , Shigeo Ibuka , Manabu Kaseda , Masanori Suenaga , Tamaki Hirai , Masahiro Takaya , Kuniharu Nomoto
IPC分类号: H01M4/02 , H01M4/36 , H01M4/131 , H01M4/505 , H01M4/525 , H01M10/0585 , H01M2/02 , H01M10/0525 , H01M2/16
CPC分类号: H01M4/364 , H01M2/0217 , H01M2/16 , H01M4/131 , H01M4/505 , H01M4/525 , H01M10/0525 , H01M10/0585 , H01M2220/20 , H01M2220/30
摘要: [Object] Provided is a means for improving cycle characteristics by suppressing electrode deterioration resulting from non-uniformity of voltage across an electrode plane in a high-capacity and large-area non-aqueous electrolyte secondary battery that includes lithium nickel-based composite oxide as a positive electrode active substance.[Solving Means] Disclosed is a positive electrode for a non-aqueous electrolyte secondary battery used in a non-aqueous electrolyte secondary battery in which the ratio value of battery area (projected area of the battery including the battery outer casing body) to rated capacity is 5 cm2/Ah or more and the rated capacity is 3 Ah or more, the positive electrode comprising a positive electrode current collector and a positive electrode active substance layer that is formed on a surface of the positive electrode current collector and has a positive electrode active substance containing a lithium nickel-based composite oxide and a spinel type lithium manganese composite oxide, in which, when the average secondary particle diameter (D50) of the lithium nickel-based composite oxide is D50(A) [μm], the content ratio of the lithium nickel-based composite oxide in the positive electrode active substance layer is A [% by mass], the average secondary particle diameter (D50) of the spinel type lithium manganese composite oxide is D50(B) [μm], and the content ratio of the spinel type lithium manganese composite oxide in the positive electrode active substance layer is B [% by mass], the positive electrode satisfies the following Mathematical Formula 1 and Mathematical Formula 2: [Math. 1] 2.0
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