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公开(公告)号：US20210159539A1
公开(公告)日：2021-05-27
申请号：US17045571
申请日：2019-02-18
Inventor： Masahiro Shiraga , Yuanlong Zhong
IPC: H01M10/0567 , H01M4/587
Abstract: A nonaqueous-electrolyte secondary cell according to one embodiment of the present disclosure comprises a positive electrode, a negative electrode, and a nonaqueous electrolyte. The negative electrode contains graphite having a BET specific surface area of 2 m2/g or less, and the nonaqueous electrolyte contains a cyclic carboxylic acid anhydride represented by formula (1) or formula (2). In the formula (1), n represents 0, 1, or 2, and R1 to R4 each independently represents a hydrogen atom, an alkyl group, an alkenyl group, or an aryl group. In the formula (2), R5 to R8 each independently represents a hydrogen atom, an alkyl group, an alkenyl group, or an aryl group.
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公开(公告)号：US20210057710A1
公开(公告)日：2021-02-25
申请号：US17049412
申请日：2019-02-19
Inventor： Masanobu Takeuchi , Manabu Takijiri , Yoshio Kato , Masahiro Shiraga
IPC: H01M2/26 , H01M10/0587 , H01M2/02 , H01M10/0567 , H01M4/587 , H01M4/133 , H01M10/0525
Abstract: A nonaqueous electrolyte secondary battery (10) according to one embodiment of the present disclosure is provided with: an electrode body (14) which is obtained by winding a positive electrode (30) and a negative electrode (40), with a separator (50) being interposed therebetween; a nonaqueous electrolyte; and a battery case (15) which is formed of a metal and contains the electrode body (14) and the nonaqueous electrolyte. The negative electrode (40) comprises a negative electrode collector (41) and a negative electrode active material layer (42) that contains graphite particles as a negative electrode active material; the outer circumferential surface of the electrode body (14) is provided with an exposure part (43) from which the negative electrode collector (41) is exposed so as to be in contact with the inner circumferential surface of the battery case (15); and the graphite particles have a compressive strength of 15 MPa or more.
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Patent Agency Ranking
公开(公告)号：US20200014066A1
公开(公告)日：2020-01-09
申请号：US16495587
申请日：2018-01-26
Inventor： Masahiro Shiraga , Mitsuru Iwai , Yuanlong Zhong
IPC: H01M10/0567 , H01M10/0569 , H01M10/0568 , H01M10/0525 , C07D319/12 , C07F1/02
Abstract: This non-aqueous electrolyte secondary battery is provided with a positive electrode, a negative electrode and a non-aqueous electrolyte. The non-aqueous electrolyte contains: a non-aqueous solvent that contains a fluorine-containing cyclic carbonate; a cyclic carboxylic acid anhydride such as diglycolic acid anhydride; and an imide lithium salt having a sulfonyl group such as lithium bis(fluorosulfonyl)imide.
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公开(公告)号：US10811729B2
公开(公告)日：2020-10-20
申请号：US15957047
申请日：2018-04-19
Inventor： Tomoki Tsuji , Masahiro Shiraga , Manabu Takijiri , Takayuki Shirane , Hiroyuki Fujimoto
IPC: H01M10/0569 , H01M10/0525 , H01M10/0587 , H01M4/525 , H01M4/131 , H01M2/36 , H01M4/02
Abstract: A nonaqueous electrolyte secondary battery includes a positive electrode including a positive electrode mix layer, a negative electrode including a negative electrode mix layer, and a nonaqueous electrolyte containing a nonaqueous solvent. A surface of the negative electrode mix layer is provided with grooves. The nonaqueous electrolyte contains 10 volume percent or more of a fluorinated solvent with respect to the volume of the nonaqueous solvent and has a viscosity (25° C.) of 3.50 mPa·s or more as measured with a differential pressure viscometer.
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公开(公告)号：US11923543B2
公开(公告)日：2024-03-05
申请号：US17049384
申请日：2019-02-22
Inventor： Yoshio Kato , Yoshinori Kida , Masahiro Shiraga
CPC classification number: H01M4/583 , H01M2004/027 , H01M2004/028
Abstract: A nonaqueous electrolyte secondary battery according to an embodiment of the present invention includes a positive electrode, a negative electrode, and a nonaqueous electrolyte, wherein the negative electrode contains, as a negative electrode active material, graphite particles having a volume per mass, of pores having a diameter of 2 nm or less determined by the DFT method from nitrogen adsorption isotherm, of 0.3 mm3/g or less.
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公开(公告)号：US20210249658A1
公开(公告)日：2021-08-12
申请号：US17049384
申请日：2019-02-22
Inventor： Yoshio Kato , Yoshinori Kida , Masahiro Shiraga
IPC: H01M4/583
Abstract: A nonaqueous electrolyte secondary battery according to an embodiment of the present invention includes a positive electrode, a negative electrode, and a nonaqueous electrolyte, wherein the negative electrode contains, as a negative electrode active material, graphite particles having a volume per mass, of pores having a diameter of 2 nm or less determined by the DFT method from nitrogen adsorption isotherm, of 0.3 mm3/g or less.
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公开(公告)号：US20180241087A1
公开(公告)日：2018-08-23
申请号：US15957047
申请日：2018-04-19
Inventor： Tomoki Tsuji , Masahiro Shiraga , Manabu Takijiri , Takayuki Shirane , Hiroyuki Fujimoto
IPC: H01M10/0569 , H01M10/0525 , H01M10/0587 , H01M4/525
CPC classification number: H01M10/0569 , H01M2/36 , H01M4/131 , H01M4/525 , H01M10/0525 , H01M10/0587 , H01M2004/025 , H01M2004/028 , H01M2300/0034
Abstract: A nonaqueous electrolyte secondary battery includes a positive electrode including a positive electrode mix layer, a negative electrode including a negative electrode mix layer, and a nonaqueous electrolyte containing a nonaqueous solvent. A surface of the negative electrode mix layer is provided with grooves. The nonaqueous electrolyte contains 10 volume percent or more of a fluorinated solvent with respect to the volume of the nonaqueous solvent and has a viscosity (25° C.) of 3.50 mPa·s or more as measured with a differential pressure viscometer.
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