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1.发明申请NEGATIVE ELECTRODE FOR NONAQUEOUS ELECTROLYTE SECONDARY BATTERIES AND NONAQUEOUS ELECTROLYTE SECONDARY BATTERY INCLUDING THE SAME 有权用于非水电解质二次电池和非电解电解质二次电池的阴极电极，包括它们公开(公告)号：US20150318545A1
公开(公告)日：2015-11-05
申请号：US14651359
申请日：2013-12-24
发明人： Taiki Satow , Masaki Deguchi , Kentaro Takahashi , Masaya Ugaji
IPC分类号： H01M4/36 , H01M4/587 , H01M10/0525 , H01M4/133 , H01M10/0569
CPC分类号： H01M4/366 , H01M4/133 , H01M4/587 , H01M4/621 , H01M10/052 , H01M10/0525 , H01M10/0569 , H01M2004/027 , H01M2300/0034
摘要： A negative electrode for nonaqueous electrolyte secondary batteries includes a negative electrode core member and a negative electrode mixture layer attached to the negative electrode core member, wherein the negative electrode mixture layer contains negative electrode active material particles with a graphite structure and a binder, the mixture density of the negative electrode mixture layer is 1.5 g/cm3 to 1.8 g/cm3, the ratio I(002)/I(110) of the diffraction intensity 1(002) of the (002) plane to the diffraction intensity I(110) of the (110) plane satisfies 60≦I(002)/I(110)≦120 as determined by measuring the negative electrode mixture layer by an X-ray diffraction method, the amount of particles with a size of 1 μm to 10 μm in the particle size distribution of a crushed product of the negative electrode mixture layer is 12% to 25% by volume.
摘要翻译： 非水电解质二次电池用负极包括负极芯材和负极复合层，负极复合层含有负极活性物质，具有石墨结构的负极活性物质和粘合剂，混合物 负极混合层的密度为1.5g / cm 3〜1.8g / cm 3，（002）面的衍射强度1（002）与衍射强度I（110）的比I（002）/ I（110） （110）面满足60＆nlE; I（002）/ I（110）＆nlE; 120，通过X射线衍射法测定负极混合物层，测定尺寸为1μm〜 负极混合物层的粉碎物的粒径分布为10μm，为12〜25体积％。
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公开(公告)号：US20230142602A1
公开(公告)日：2023-05-11
申请号：US17910974
申请日：2021-02-08
发明人： Ken Kaneko , Yuu Takanashi , Kentaro Takahashi
IPC分类号： H01M10/052 , H01M4/36 , H01M4/525 , H01M4/505
CPC分类号： H01M10/052 , H01M4/364 , H01M4/525 , H01M4/505 , H01M2004/028
摘要： This nonaqueous electrolyte secondary battery has a non-aqueous electrolyte and an electrode assembly formed by layering a positive electrode and a negative electrode layered via a separator. The positive electrode has a positive electrode core and a positive electrode mix layer containing a positive electrode active substance. The median diameter (D50) of the positive electrode active substance in terms of volume is 5.0 to 7.0 μm, the BET specific surface area of the positive electrode active substance is 2.00 to 3.00 m2/g, the TAP density of the positive electrode active substance is 1.30 to 1.70 g/cm3, and the density of the positive electrode mix layer is 2.3 to 2.5 g/cm3.
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公开(公告)号：US20190103609A1
公开(公告)日：2019-04-04
申请号：US16134276
申请日：2018-09-18
发明人： Shinichi Yamami , Kentaro Takahashi
IPC分类号： H01M4/587 , H01M4/36 , H01M10/0525 , H01M10/0568 , H01M10/058
摘要： A nonaqueous electrolyte secondary battery includes: a positive electrode; a negative electrode having a negative electrode active material mixture layer containing a negative electrode active material; a separator placed between the positive electrode and the negative electrode; and a nonaqueous electrolyte, where: the negative electrode active material includes coated graphite particles in which a surface of each graphite particle is covered with a coating layer containing first amorphous carbon and second amorphous carbon; and the negative electrode active material mixture layer contains the coated graphite particles and third amorphous carbon. The negative electrode active material mixture layer has an arithmetic-average surface roughness Ra of 2.8 μm to 3.4 μm, the separator has an elastic modulus of 15.1 MPa to 36.3 MPa, and the nonaqueous electrolyte contains a difluorophosphate salt and a lithium salt of an oxalate complex anion.
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公开(公告)号：US20200313163A1
公开(公告)日：2020-10-01
申请号：US16736150
申请日：2020-01-07
IPC分类号： H01M4/133 , H01M4/1393 , H01M4/36 , H01M10/0525 , H01M4/587 , C01B32/20
摘要： In a non-aqueous electrolyte secondary battery, a negative electrode includes covered graphite particles in each of which a surface of a graphite particle is covered with amorphous carbon, styrene-butadiene rubber, and at least one of carboxymethyl cellulose and a salt of carboxymethyl cellulose. The amorphous carbon included in each of the covered graphite particles includes an amorphous carbon layer formed of a first amorphous carbon and amorphous carbon particles formed of a second amorphous carbon. The second amorphous carbon has a higher electrical conductivity than the first amorphous carbon, the amorphous carbon particles have a BET specific surface area of 37 to 47 m2/g, the styrene-butadiene rubber has an average primary particle size of 150 to 210 nm, and at least one of the carboxymethyl cellulose and the salt of carboxymethyl cellulose has a weight average molecular weight of 3.7×105 to 4.3×105.
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公开(公告)号：US20230094242A1
公开(公告)日：2023-03-30
申请号：US17910217
申请日：2021-02-08
发明人： Shinichi Yamami , Kentaro Takahashi
IPC分类号： H01M10/0567 , H01M4/587 , H01M4/133 , H01M4/36 , H01M4/62 , H01M10/0568
摘要： This nonaqueous electrolyte secondary battery is provided with a positive electrode, a negative electrode, and a nonaqueous electrolyte. The negative electrode has a negative electrode core body and a negative electrode mixture layer formed on the surface of the negative electrode core body. The negative electrode mixture layer contains: a negative electrode active material which has a pore volume of 0.5 ml/g or less and in which a coating layer containing a first amorphous carbon and a second amorphous carbon is formed on the surfaces of graphite particles; and a third amorphous carbon serving as a conductive material. The nonaqueous electrolyte contains difluorophosphate and a lithium salt including an oxalate complex as an anion.
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公开(公告)号：US11271208B2
公开(公告)日：2022-03-08
申请号：US16662243
申请日：2019-10-24
IPC分类号： H01M4/62 , H01M4/133 , H01M4/02 , H01M4/1393 , H01M4/04 , H01M4/587 , H01M10/0525
摘要： A secondary battery according to one aspect of the present disclosure includes a negative electrode which includes a negative electrode core and a negative electrode active material layer provided on at least one surface of the negative electrode core. In this secondary battery, the negative electrode active material layer includes a negative electrode active material which contains graphite having a crystalline size of 10 nm or more and an interlayer distance d002 of 0.3356 to 0.3360 nm and a rubber-based binding material having an average primary particle diameter of 120 to 250 nm, the negative electrode active material has a pore capacity of 0.5 ml/g or less at a pore diameter of 0.2 to 1 μm measured by a mercury porosimeter, and the rate of the average primary particle diameter of the rubber-based binding material to the pore capacity of the negative electrode active material is 1.15 to 1.70 g/m2.
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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：US20180277831A1
公开(公告)日：2018-09-27
申请号：US15921147
申请日：2018-03-14
IPC分类号： H01M4/133 , H01M4/1393 , H01M4/36 , H01M4/587 , H01M4/62 , H01M4/04 , H01M10/0525 , H01M10/0568
CPC分类号： H01M4/133 , H01M4/0404 , H01M4/1393 , H01M4/366 , H01M4/587 , H01M4/625 , H01M10/0525 , H01M10/0568 , H01M2004/027 , H01M2300/004 , Y02E60/122 , Y02T10/7011
摘要： There is provided a nonaqueous electrolyte secondary battery in which lithium deposition on the surface of a negative electrode is suppressed. The nonaqueous electrolyte secondary battery includes a positive electrode, a negative electrode having a negative electrode active material mixture layer containing a negative electrode active material, and a nonaqueous electrolyte. The negative electrode active material contains coated graphite particles having surfaces coated with a coating layer which contains first amorphous carbon and second amorphous carbon. The negative electrode active material mixture layer contains the coated graphite particles and third amorphous carbon as a conductive agent. The nonaqueous electrolyte contains a difluorophosphate salt and a lithium salt having an oxalate complex as an anion.
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公开(公告)号：US20170170525A1
公开(公告)日：2017-06-15
申请号：US15327175
申请日：2015-07-14
发明人： Shunsuke Mitani , Satoshi Yamamoto , Yasunori Watanabe , Kentaro Takahashi , Masaki Deguchi , Yuta Ichikawa , Masaya Ugaji
IPC分类号： H01M10/0587 , H01M4/48 , H01M4/587 , H01M2/26 , H01M2/14
摘要： It is an object of the present invention to provide a nonaqueous electrolyte secondary battery in which swelling due to charge-discharge cycling is inhibited. The nonaqueous electrolyte secondary battery including a flat electrode assembly in which a first electrode plate and a second electrode plate having a different polarity from the first electrode plate are wound with a separator provided therebetween.
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公开(公告)号：US20220376258A1
公开(公告)日：2022-11-24
申请号：US17771280
申请日：2020-10-19
发明人： Na Wang , Daisuke Ikeda , Kentaro Takahashi
IPC分类号： H01M4/62 , H01M10/0587 , H01M4/583 , H01M4/133
摘要： This non-aqueous electrolyte secondary battery is provided with: an electrode body that has a positive electrode and a negative electrode; and an outer package in which the electrode body is accommodated. The negative electrode comprises a negative electrode core body and a negative electrode mixture layer formed on the surface of the negative electrode core body. The negative electrode mixture layer comprises: a negative electrode active material that has a tap density of 1.00-1.20 g/cm3; CMC, the content of which accounts for 0.6-0.8 mass % in the negative electrode mixture layer; and SBR, the content of which accounts for 0.4-0.8 mass % in the negative electrode mixture layer. The mass ratio of the content of CMC to the content of SBR in the negative electrode mixture layer is less than 2, and the total content of CMC and SBR in the negative electrode mixture layer is less than 1.5 mass %.
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