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公开(公告)号：EP3657579A1
公开(公告)日：2020-05-27
申请号：EP18835168.8
申请日：2018-07-18
发明人： DOI, Shotaro , KUSACHI, Yuki , HORIE, Hideaki , NAKASHIMA, Yusuke , TSUCHIDA, Kazuya , SUMIYA, Koji , ASANO, Shigehito , KOGA, Yasuyuki , ANDO, Nobuo , KOKUBO, Terukazu
摘要： There is provided a means capable of suppressing generation of a lithium dendrite at the time of charging and discharging while sufficiently suppressing an amount of gas generated at the time of initial charging of an electric device.
When a lithium ion is doped in advance to a negative electrode active material, which is used in an electric device including a positive electrode and a negative electrode, after performing a pre-doping step of doping the lithium ion to a negative electrode active material to be doped to reduce a potential (vs. Li+/Li) of the negative electrode active material to be doped with respect to a lithium metal, a dedoping step of dedoping the lithium ion from the negative electrode active material doped with the lithium ion in the pre-doping step to increase a potential (vs. Li+/Li) of the negative electrode active material with respect to the lithium metal is performed.-
2.发明公开
公开(公告)号：EP3866223A1
公开(公告)日：2021-08-18
申请号：EP19870919.8
申请日：2019-10-02
发明人： NAKANO, Takeshi , ITO, Atsushi , OGIHARA, Wataru , NAKASHIMA, Yusuke , MINAMI, Kazuya , SHOJI, Naofumi , SUZUKI, Kaho
摘要： Provided is a technique capable of further improving the cycle characteristics in a negative electrode for a non-aqueous electrolyte secondary battery in which a silicon-based negative electrode active material and a carbon-based negative electrode active material are used in combination as a negative electrode active material, and constituent components of the electrode are not bound to each other via a binder. The negative electrode for a non-aqueous electrolyte secondary battery according to the present invention has a configuration in which a negative electrode active material layer containing a negative electrode active material is formed on a surface of a current collector. The negative electrode active material contains composite secondary particles in which silicon-based negative electrode active material particles and carbon-based negative electrode active material particles are bound to each other via a binder. Here, the content of the binder in the composite secondary particles is 1% by mass or more with respect to the total mass of the silicon-based negative electrode active material particles and the carbon-based negative electrode active material particles. Further, in the negative electrode active material layer, the composite secondary particles are characterized to exist in a state of being not bound to each other via a binder.
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公开(公告)号：EP3817122A1
公开(公告)日：2021-05-05
申请号：EP19811557.8
申请日：2019-05-22
IPC分类号： H01M10/0585 , H01M4/13 , H01M10/0566
摘要： [Problem]
To provide a means which enables a nonaqueous electrolyte secondary battery to decrease the internal resistance of the battery and to improve the cycle characteristics, while suppressing decrease of the energy density of the battery to the minimum, said nonaqueous electrolyte secondary battery using an electrode wherein an electrode active material layer, which is formed of a non-binding body that does not contain a binder which is crystallized by heating, is arranged on the surface of a collector. [Solution] A battery device according to the present invention comprises: a nonaqueous electrolyte secondary battery which is provided with an electric power generating element; and a pressing member which presses the electric power generating element in the stacking direction of the electric power generating element. This battery device is configured such that the electric power generating element comprises : a positive electrode that is obtained by forming a positive electrode active material layer, which is formed of a non-binding body containing a positive electrode active material, on the surface of a positive electrode collector; a negative electrode that is obtained by forming a negative electrode active material layer, which is formed of a non-binding body containing a negative electrode active material, on the surface of a negative electrode collector; and a separator which holds an electrolyte solution. In addition, this battery device satisfies mathematical formula (1) 0.1-
公开(公告)号：EP3780172A1
公开(公告)日：2021-02-17
申请号：EP19784997.9
申请日：2019-03-22
发明人： TANAKA, Hiroyuki , NAKANO, Takeshi , OGIHARA, Wataru , KAWAKITA, Kenichi , NAKASHIMA, Yusuke , KUSANO, Ryosuke
摘要： A method for producing a non-aqueous electrolyte secondary battery in which the internal resistance of the battery is decreased, and which has a high capacity and high cycle durability, is provided.
A method for producing a non-aqueous electrolyte secondary battery that comprises a current collector and an electrode active material layer disposed on a surface of the current collector, the electrode active material layer comprising a non-bound body including an electrode active material, the method comprising a step of applying an electrode active material slurry including an electrode active material, a lithium salt, and a non-aqueous solvent on the surface of the current collector and thereby forming a coating film, wherein a water content of the electrode active material slurry is less than 500 ppm by mass.-
公开(公告)号：EP3537514A1
公开(公告)日：2019-09-11
申请号：EP17867325.7
申请日：2017-11-07
发明人： MINAMI, Kazuya , NAKASHIMA, Yusuke , OHSAWA, Yasuhiko , KUSACHI, Yuki , SATOU, Hajime , AKAMA, Hiroshi , HORIE, Hideaki
IPC分类号： H01M4/13 , H01M4/36 , H01M4/66 , H01M10/0566 , H01M10/0568
摘要： To provide a positive electrode for a lithium ion battery having high energy density and being capable of rapid discharging.
A positive electrode for a lithium ion battery, the positive electrode including a positive electrode current collector, a positive electrode active material layer formed on the surface of the positive electrode current collector, and a non-aqueous liquid electrolyte including an electrolyte containing lithium ions and a non-aqueous solvent, in which the positive electrode active material layer includes a positive electrode active material and voids, the voids are filled with the non-aqueous liquid electrolyte, and a proportion of the battery capacity based on a total amount of lithium ions in the non-aqueous liquid electrolyte existing in the positive electrode active material layer with respect to the battery capacity based on a total amount of the positive electrode active material is 3.5 to 15%.-
公开(公告)号：EP3561912B1
公开(公告)日：2020-12-02
申请号：EP17884512.9
申请日：2017-12-19
发明人： TSUCHIDA, Kazuya , NAKASHIMA, Yusuke , OHSAWA, Yasuhiko , KUSACHI, Yuki , SATOU, Hajime , AKAMA, Hiroshi , HORIE, Hideaki
IPC分类号： H01M4/133 , H01M4/13 , H01M4/134 , H01M4/139 , H01M4/36 , H01M10/052 , H01M4/04 , H01M10/0525
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公开(公告)号：EP3537513A1
公开(公告)日：2019-09-11
申请号：EP17866935.4
申请日：2017-11-07
发明人： MINAMI, Kazuya , NAKASHIMA, Yusuke , OHSAWA, Yasuhiko , KUSACHI, Yuki , SATOU, Hajime , AKAMA, Hiroshi , HORIE, Hideaki
IPC分类号： H01M4/13 , H01M4/36 , H01M4/66 , H01M10/0566 , H01M10/0568
摘要： To provide a negative electrode for a lithium ion battery having high energy density and excellent rapid charging characteristics.
A negative electrode for a lithium ion battery, the negative electrode including a negative electrode current collector, a negative electrode active material layer formed on the surface of the negative electrode current collector, and a non-aqueous liquid electrolyte including an electrolyte containing lithium ions and a non-aqueous solvent, in which the negative electrode active material layer includes a negative electrode active material and voids, the voids are filled with the non-aqueous liquid electrolyte, and a proportion of the battery capacity based on a total amount of lithium ions in the non-aqueous liquid electrolyte existing in the negative electrode active material layer with respect to the battery capacity based on a total amount of the negative electrode active material is 3% to 17%.-
公开(公告)号：EP3518325A1
公开(公告)日：2019-07-31
申请号：EP17852736.2
申请日：2017-08-15
发明人： TANAKA, Hiroyuki , KANO, Gentaro , HORIE, Hideaki , KUSACHI, Yuki , NAKASHIMA, Yusuke , MINAMI, Kazuya
摘要： An object of the present invention is to provide a means for improving output characteristics at a high rate in a non-aqueous electrolyte secondary battery including a thickened negative electrode active material layer.
A negative electrode for non-aqueous electrolyte secondary battery according to the present invention has a negative electrode active material layer having a thickness of 150 to 1500 µm formed on a surface of a current collector. In addition, the negative electrode active material layer includes coated negative electrode active material particles in which at least a part of a surface of a negative electrode active material is coated with a coating agent containing a coating resin and a conductive aid. Furthermore, a porosity of the negative electrode active material layer is 39.0% to 60.0% and a density of the negative electrode active material layer is 0.60 to 1.20 g/cm 3 .-
9.发明公开ELECTRODE FOR LITHIUM-ION CELL, LITHIUM-ION CELL, AND METHOD OF MANUFACTURING ELECTRODE FOR LITHIUM-ION CELL 审中-公开锂离子电池用电极，锂离子电池以及锂离子电池的制造方法
公开(公告)号：EP3276707A1
公开(公告)日：2018-01-31
申请号：EP16772071.3
申请日：2016-03-03
发明人： MIZUNO, Yusuke , SHINDO, Yasuhiro , NAKASHIMA, Yusuke , KAWAKITA, Kenichi , KUSACHI, Yuki , OHSAWA, Yasuhiko , SATOU, Hajime , AKAMA, Hiroshi , HORIE, Hideaki
摘要： The objective of the present invention is to provide an electrode for a lithium ion battery which has excellent electron conductivity even when the thickness of the electrode is increased. The electrode for a lithium ion battery according to the present invention includes a first principal surface located on a separator side of the lithium ion battery, and a second principal surface located on a current collector side, wherein the electrode has a thickness of 50 to 5000 µm, and the electrode includes, between the first principal surface and the second principal surface, short fibers (A) having an average fiber length of 50 nm or more and less than 100 µm, long fibers (B) having an average fiber length of 100 µm or more and 1000 µm or less, and active material particles (C), and the short fibers (A) and the long fibers (B) are electroconductive fibers.
摘要翻译： 本发明的目的在于提供即使增加电极的厚度也具有优异的电子传导性的锂离子电池用电极。 根据本发明的用于锂离子电池的电极包括位于锂离子电池隔板侧的第一主表面和位于集电器侧的第二主表面，其中电极具有50至5000的厚度 μm，所述电极在所述第一主面与所述第二主面之间具有平均纤维长度为50nm以上且小于100μm的短纤维（A），所述平均纤维长度为 100μm以上且1000μm以下，活性物质粒子（C），短纤维（A）和长纤维（B）为导电性纤维。
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公开(公告)号：EP3780234A1
公开(公告)日：2021-02-17
申请号：EP19785263.5
申请日：2019-04-09
发明人： DOI, Shotaro , YAMAUCHI, Noboru , KUSACHI, Yuki , SATOU, Hajime , HORIE, Hideaki , NAKASHIMA, Yusuke , SHOJI, Naofumi , TSUCHIDA, Kazuya , SUMIYA, Koji , HATAZOE, Takumi , ASANO, Shigehito , ANDO, Nobuo
IPC分类号： H01M10/0568 , H01M4/13 , H01M4/134 , H01M4/36 , H01M4/38 , H01M4/48 , H01M10/052
摘要： Provided is a means that can suppress, in a non-aqueous electrolyte secondary battery that uses a negative electrode active material including a Si material and uses an electrolyte solution including LiFSI, the occurrence of an exothermic reaction that can cause deterioration of the battery even in a case when the battery temperature has risen.
A non-aqueous electrolyte secondary battery according to the present invention has a power generating element that includes a positive electrode in which a positive electrode active material layer including a positive electrode active material is formed on a surface of a positive electrode current collector, a negative electrode in which a negative electrode active material layer including a negative electrode active material is formed on a surface of a negative electrode current collector, and a separator impregnated with an electrolyte solution. Here, the negative electrode active material includes a Si material that contains silicon and is capable of insertion and removal of lithium ions. The electrolyte solution contains lithium bis (fluorosulfonyl) imide (LiFSI) and an inorganic lithium salt other than the LiFSI, and has a feature that a ratio of a concentration (mol/L) of the LiFSI with respect to a concentration (mol/L) of the inorganic lithium salt (LiFSI/inorganic lithium salt) in the electrolyte solution is 1 or less.
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