公开(公告)号：US20200044243A1

公开(公告)日：2020-02-06

申请号：US16577763

申请日：2019-09-20

Applicant: MURATA MANUFACTURING CO., LTD.

Inventor： Yosuke KOIKE

IPC: H01M4/36 ,  H01M4/131

Abstract: A battery includes a positive electrode, a negative electrode, and an electrolyte, and the positive electrode includes a substituted barium titanate.

公开(公告)号：US20200058926A1

公开(公告)日：2020-02-20

申请号：US16521998

申请日：2019-07-25

Applicant: MURATA MANUFACTURING CO., LTD.

Inventor： Takehiro NAKAMARU ,  Yosuke KOIKE

IPC: H01M4/133 ,  H01G11/28 ,  H01M4/66

Abstract: A battery includes a positive electrode, a negative electrode, and an electrolyte, and the positive electrode contains a melamine-based compound.

公开(公告)号：US20180226637A1

公开(公告)日：2018-08-09

申请号：US15749883

申请日：2016-07-26

Applicant: Murata Manufacturing Co., Ltd.

Inventor： Yosuke KOIKE

IPC: H01M4/36 ,  H01M4/583 ,  H01M4/38 ,  H01M4/60 ,  H01M4/62 ,  H01M4/04

CPC classification number: H01M4/364 ,  H01M4/0404 ,  H01M4/133 ,  H01M4/134 ,  H01M4/1393 ,  H01M4/1395 ,  H01M4/366 ,  H01M4/386 ,  H01M4/583 ,  H01M4/587 ,  H01M4/604 ,  H01M4/62 ,  H01M4/622 ,  H01M4/623 ,  H01M4/628 ,  H01M10/0525 ,  H01M2004/027 ,  H01M2004/028 ,  H01M2220/10 ,  H01M2220/20 ,  Y02E60/122 ,  Y02P70/54 ,  Y02T10/7011

Abstract: An anode includes an anode current collector and an anode active material layer provided on the anode current collector, and the anode active material layer includes a first anode active material, a second anode active material, and an anode binder. The first anode active material includes a first central portion and a first coating portion provided on a surface of the first central portion. The first central portion includes a material that includes carbon as a constituent element, and the first coating portion includes a polyacrylate salt. The second anode active material includes a second central portion and a second coating portion provided on a surface of the second central portion. The second central portion includes a material that includes silicon as a constituent element, and the second coating portion includes a polyacrylate salt. The anode binder includes one or more of styrene butadiene rubber, readily water-dispersible polyvinylidene fluoride, and carboxymethylcellulose. A ratio of a weight of the polyacrylate salt included in the anode active material layer to a weight of the anode active material layer is in a range from 0.1 wt % to 0.8 wt % both inclusive.

公开(公告)号：US20240162447A1

公开(公告)日：2024-05-16

申请号：US18511047

申请日：2023-11-16

Applicant: MURATA MANUFACTURING CO., LTD.

Inventor： Yosuke KOIKE

IPC: H01M4/62 ,  H01M4/02 ,  H01M4/134 ,  H01M4/38 ,  H01M10/0525 ,  H01M10/0562

CPC classification number: H01M4/625 ,  H01M4/134 ,  H01M4/386 ,  H01M10/0525 ,  H01M10/0562 ,  H01M2004/021 ,  H01M2004/027 ,  H01M2300/0025 ,  H01M2300/0068

Abstract: A secondary battery includes a positive electrode, a negative electrode, and an electrolytic solution. The negative electrode includes first fiber parts, particle parts, and second fiber parts, and has voids. The first fiber parts are coupled to each other to thereby form a three-dimensional mesh structure having the voids. The first fiber parts each include carbon as a constituent element. The particle parts cover surfaces of the first fiber parts. Some of the particle parts are coupled to each other. The particle parts each include silicon as a constituent element. At least some of the second fiber parts are coupled to surfaces of the particle parts. The second fiber parts each include carbon as a constituent element. The first fiber parts have an average fiber diameter that is greater than or equal to 50 nm and less than or equal to 7000 nm. The second fiber parts have an average fiber diameter that is greater than or equal to 1 nm and less than or equal to 200 nm. The negative electrode has a void rate that is greater than or equal to 42 vol % and less than or equal to 73 vol %.

公开(公告)号：US20240154101A1

公开(公告)日：2024-05-09

申请号：US18411508

申请日：2024-01-12

Applicant: MURATA MANUFACTURING CO., LTD.

Inventor： Yosuke KOIKE

IPC: H01M4/36 ,  H01M4/133 ,  H01M4/134 ,  H01M4/38 ,  H01M4/587 ,  H01M10/0525 ,  H01M4/02

CPC classification number: H01M4/366 ,  H01M4/133 ,  H01M4/134 ,  H01M4/386 ,  H01M4/587 ,  H01M10/0525 ,  H01M2004/021 ,  H01M2004/027

Abstract: A secondary battery includes a positive electrode, a negative electrode, a separator, and an electrolytic solution. The negative electrode includes fiber parts and covering parts, and has voids. The separator is disposed between the positive electrode and the negative electrode. The fiber parts are coupled to each other to thereby form a three-dimensional mesh structure having the voids. The fiber parts each include carbon as a constituent element. The covering parts each cover a surface of corresponding one of the fiber parts, and each include silicon as a constituent element. Where the negative electrode is bisected into a first part and a second part in a direction in which the positive electrode and the negative electrode are opposed to each other with the separator interposed between the positive electrode and the negative electrode, at least one of an average fiber diameter of the fiber parts, a proportion of a weight of the covering parts to a sum of a weight of the fiber parts and the weight of the covering parts, or a void rate varies between the first part and the second part. The first part is positioned on a side close to the separator. The second part is positioned on a side far from the separator.

公开(公告)号：US20240097127A1

公开(公告)日：2024-03-21

申请号：US18509630

申请日：2023-11-15

Applicant: MURATA MANUFACTURING CO., LTD.

Inventor： Yosuke KOIKE

IPC: H01M4/58 ,  H01M10/0525

CPC classification number: H01M4/58 ,  H01M10/0525 ,  H01M2004/027

Abstract: A secondary battery includes a positive electrode, a negative electrode, and an electrolytic solution. The negative electrode includes first fiber parts, covering parts, and second fiber parts, and has voids. The first fiber parts are coupled to each other to thereby form a three-dimensional mesh structure having the voids. The first fiber parts each include carbon as a constituent element. The covering parts each cover a surface of corresponding one of the first fiber parts, and each include silicon as a constituent element. At least some of the second fiber parts are each coupled to a surface of any of the covering parts. The second fiber parts each include carbon as a constituent element. The first fiber parts have an average fiber diameter that is greater than or equal to 10 nm and less than or equal to 8000 nm. The second fiber parts have an average fiber diameter that is greater than or equal to 1 nm and less than or equal to 300 nm. The negative electrode has a void rate that is greater than or equal to 40 vol % and less than or equal to 70 vol %.

公开(公告)号：US20220246930A1

公开(公告)日：2022-08-04

申请号：US17720878

申请日：2022-04-14

Applicant: MURATA MANUFACTURING CO., LTD.

Inventor： Hironobu KUBOTA ,  Yosuke KOIKE

IPC: H01M4/525 ,  H01M4/04 ,  H01M4/60 ,  H01M4/505

Abstract: The present disclosure provides a negative electrode active material for a battery, exhibiting sufficiently excellent initial charge-discharge efficiency and cycle characteristics by suppressing physical deterioration of a film due to expansion and contraction of a core material. The negative electrode active material for a battery, comprising: a negative electrode active material core material; and a film provided on a surface of the negative electrode active material core material. The film includes an organic-inorganic hybrid film having a reactant. The reactant at least includes a first metal alkoxide including no metal atom-carbon atom bond in a molecule; and a second metal alkoxide including two or more of metal atom-carbon atom bonds in a molecule.

公开(公告)号：US20200161701A1

公开(公告)日：2020-05-21

申请号：US16751504

申请日：2020-01-24

Applicant: MURATA MANUFACTURING CO., LTD.

Inventor： Yosuke KOIKE

IPC: H01M10/0566 ,  H01M10/0525 ,  H01M4/36 ,  H01M4/62

Abstract: A secondary battery includes a positive electrode, a negative electrode including a first negative electrode active material, a second negative electrode active material, and a normal temperature molten salt composition, and an electrolytic solution. The first negative electrode active material includes a first material including carbon, and the second negative electrode active material includes a second material including silicon.