公开(公告)号：US20250167244A1

公开(公告)日：2025-05-22

申请号：US18840213

申请日：2023-02-10

Applicant: Panasonic Intellectual Property Management Co., Ltd.

Inventor： Akihiro Kawakita ,  Masaki Deguchi ,  Katsuya Inoue ,  Takeshi Ogasawara

IPC: H01M4/62 ,  H01M4/02 ,  H01M4/525

Abstract: The present invention provides a positive electrode active material which is capable of suppressing an increase in the direct-current resistance caused by repeated charging and discharging. This positive electrode active material, which is contained in nonaqueous electrolyte secondary batteries, contains a lithium-containing composite oxide that has a layered rock salt structure and a sulfonic acid compound that is present on the surface of the lithium-containing composite oxide; the lithium-containing composite oxide contains 25% by mole to 75% by mole of Ni, 15% by mole to 40% by mole of Co and 5% by mole to 50% by mole of Mn relative to the total number of moles of metal elements other than Li; and the sulfonic acid compound is represented by general formula I. (In the formula, A represents a group I element or a group 2 element; R represents a hydrocarbon group; and n is 1 or 2.)

公开(公告)号：US11923528B2

公开(公告)日：2024-03-05

申请号：US16471944

申请日：2017-12-20

Applicant: Panasonic Intellectual Property Management Co., Ltd.

Inventor： Satoshi Nishitani ,  Hiroshi Minami ,  Masaki Deguchi

IPC: H01M4/131 ,  H01M4/02 ,  H01M4/133 ,  H01M4/134 ,  H01M4/36 ,  H01M4/38 ,  H01M4/485 ,  H01M4/587 ,  H01M4/62 ,  H01M10/0525 ,  H01M10/0567

CPC classification number: H01M4/131 ,  H01M4/133 ,  H01M4/134 ,  H01M4/364 ,  H01M4/386 ,  H01M4/485 ,  H01M4/587 ,  H01M4/622 ,  H01M10/0525 ,  H01M10/0567 ,  H01M2004/027

Abstract: A positive electrode, a negative electrode, and a non-aqueous electrolyte. The negative electrode includes a negative electrode material, a binder, and a thickener, and the negative electrode material includes a lithium silicate phase, and Si particles dispersed in the lithium silicate phase. The ratio of the Si particles in the negative electrode material is 30 mass % or more. The binder includes a poly(meth)acrylic acid, the thickener includes a carboxyalkyl cellulose, and the amount of the poly(meth)acrylic acid relative to 100 parts by mass of the negative electrode material is 0.1 parts by mass or more and 5 parts by mass or less. The non-aqueous electrolyte includes a lithium salt, a non-aqueous solvent, and an acid that exhibits a pKa of 1 to 30 in water at 25° C. The non-aqueous electrolyte secondary battery can suppress the generation of gas during high-temperature storage, and secure excellent cycle characteristics.

公开(公告)号：US20240063436A1

公开(公告)日：2024-02-22

申请号：US18278708

申请日：2022-02-10

Applicant: Panasonic Intellectual Property Management Co., Ltd.

Inventor： Takayuki Nakatsutsumi ,  Masaki Deguchi

IPC: H01M10/0567 ,  H01M4/525 ,  H01M4/38 ,  H01M4/131 ,  H01M4/134 ,  H01M10/0525

CPC classification number: H01M10/0567 ,  H01M4/525 ,  H01M4/386 ,  H01M4/131 ,  H01M4/134 ,  H01M10/0525

Abstract: A non-aqueous secondary battery including a positive electrode including a lithium-transition metal composite oxide containing at least nickel as a transition metal, a negative electrode including a silicon-containing material, a separator interposed between the positive electrode and the negative electrode, and a liquid electrolyte. The liquid electrolyte contains a sultone compound and an isocyanate compound, and 1≤A/B≤10 is satisfied, where a concentration of the sultone compound in the liquid electrolyte is A mass %, and a concentration of the isocyanate compound in the liquid electrolyte is B mass %.

公开(公告)号：US20210050625A1

公开(公告)日：2021-02-18

申请号：US16965518

申请日：2019-01-10

Applicant: Panasonic Intellectual Property Management Co., Ltd.

Inventor： Yasuko Nozaki ,  Satoshi Nishitani ,  Chisaki Fujitomo ,  Masaki Deguchi

IPC: H01M10/0568 ,  H01M2/16 ,  H01M4/131 ,  H01M10/058

Abstract: Disclosed is a non-aqueous electrolyte secondary battery including: a positive electrode, a negative electrode, a separator interposed between the positive electrode and the negative electrode, and an electrolyte solution, wherein the electrolyte solution includes a lithium salt and carboxylic acid, and the lithium salt includes lithium bis(fluorosulfonyl)imide: LiN(SO2F)2.

公开(公告)号：US20200020987A1

公开(公告)日：2020-01-16

申请号：US16582141

申请日：2019-09-25

Applicant: Panasonic Intellectual Property Management Co., Ltd.

Inventor： Naoya Morisawa ,  Kazuhiro Iida ,  Masaki Deguchi ,  Atsushi Fukui

IPC: H01M10/0569 ,  H01M4/1315

Abstract: A nonaqueous electrolyte solution according to one embodiment of the present disclosure contains a lithium salt and a nonaqueous solvent; the nonaqueous solvent contains fluoroethylene carbonate and a chain carboxylic acid ester having a dielectric constant of 6.0 or more; the lithium salt contains LiPO2F2 and LiSO3F; and the respective concentrations of LiPO2F2 and LiSO3F in the non-aqueous solvent are 0.15 mol/L or more.

公开(公告)号：US20220294017A1

公开(公告)日：2022-09-15

申请号：US17634477

申请日：2020-07-03

Applicant: Panasonic Intellectual Property Management Co., Ltd.

Inventor： Satoshi Nishitani ,  Masaki Deguchi

IPC: H01M10/0569 ,  H01M4/36 ,  H01M4/38 ,  H01M4/525 ,  H01M4/505 ,  H01M4/485 ,  H01M4/58 ,  H01M10/0525 ,  H01M10/0568

Abstract: A nonaqueous electrolyte secondary battery includes a positive electrode, a negative electrode, and a nonaqueous electrolyte. The positive electrode includes a positive electrode material including particles of a composite oxide containing lithium and a metal Me other than lithium, and a tungsten compound attached to a surface of the particles. The metal Me contains at least nickel. The nonaqueous electrolyte includes an unsaturated sultone compound.

公开(公告)号：US20210151759A1

公开(公告)日：2021-05-20

申请号：US17252923

申请日：2019-02-20

Applicant: Panasonic Intellectual Property Management Co., Ltd.

Inventor： Satoshi Nishitani ,  Masaki Deguchi

IPC: H01M4/58 ,  H01M10/0525 ,  H01M10/0568 ,  H01M10/0567

Abstract: Disclosed is a non-aqueous electrolyte secondary battery including: a positive electrode; a negative electrode; and an electrolyte solution. The negative electrode contains a negative electrode active material that is capable of electrochemically absorbing and desorbing lithium. The negative electrode active material contains a lithium silicate phase and silicon particles that are dispersed in the lithium silicate phase. The lithium silicate phase is an oxide phase that contains lithium, silicon, and oxygen. The atomic ratio O/Si of oxygen relative to silicon in the lithium silicate phase is greater than 2 and less than 4. The electrolyte solution contains a halogenated benzene. The amount of halogenated benzene contained in the electrolyte solution is 1 ppm or more and 500 ppm or less.

公开(公告)号：US20250096239A1

公开(公告)日：2025-03-20

申请号：US18730957

申请日：2023-01-16

Applicant: Panasonic Intellectual Property Management Co., Ltd.

Inventor： Daizo Jito ,  Akihiro Kawakita ,  Masaki Deguchi ,  Katsuya Inoue ,  Takeshi Ogasawara

IPC: H01M4/36 ,  H01M4/131 ,  H01M4/525 ,  H01M4/62 ,  H01M10/052

Abstract: A positive electrode active material which is to be included in this nonaqueous electrolyte secondary battery and contains a lithium-containing complex oxide having a prescribed composition which has a layered evaporitic structure, wherein: the lithium-containing complex oxide contains secondary particles formed by clumping primary particles with one another; and a sulfonic acid compound represented by general formula I, one or more types of element selected from Ca and Sr, and one or more types of element selected from W, Mo, Ti, Si, Nb and Zr are present on the surface of the secondary particles or at the interface between the primary particles. (In the formula, A is a Group 1 element or a Group 2 element, R is a hydrocarbon group, and n is 1 or 2.)

公开(公告)号：US12119445B2

公开(公告)日：2024-10-15

申请号：US16966147

申请日：2019-01-10

Applicant: Panasonic Intellectual Property Management Co., Ltd.

Inventor： Chisaki Fujitomo ,  Satoshi Nishitani ,  Yasuko Nozaki ,  Masaki Deguchi

IPC: H01M10/0567 ,  H01M10/0525 ,  H01M10/0568 ,  H01M10/0569 ,  H01M10/058

CPC classification number: H01M10/0567 ,  H01M10/0525 ,  H01M10/0568 ,  H01M10/0569 ,  H01M10/058

Abstract: Disclosed is a non-aqueous electrolyte secondary battery including: a positive electrode, a negative electrode, a separator interposed between the positive electrode and the negative electrode, and an electrolyte solution, wherein the electrolyte solution includes a solvent, a solute, and a carboxylic anhydride, the solvent includes a carboxylic acid ester compound, and the solute includes a sulfonyl imide compound.

公开(公告)号：US20220069307A1

公开(公告)日：2022-03-03

申请号：US17415062

申请日：2019-12-11

Applicant: Panasonic Intellectual Property Management Co., Ltd.

Inventor： Chisaki Fujitomo ,  Satoshi Nishitani ,  Junichi Sakamoto ,  Masaki Deguchi

IPC: H01M4/58 ,  H01M10/0569 ,  H01M4/38

Abstract: A non-aqueous electrolyte secondary battery including a positive electrode, a negative electrode, and a non-aqueous electrolyte. The negative electrode includes a negative electrode active material capable of electrochemically absorbing and releasing lithium, the negative electrode active material includes a composite material containing a silicate phase and silicon particles dispersed in the silicate phase, and the silicate phase includes at least one of an alkali metal and an alkaline earth metal. The content of the silicon particles in the composite material is above 40 mass % and 80 mass % or less. The non-aqueous electrolyte includes a sultone compound, and the content of the sultone compound in the non-aqueous electrolyte is 2 mass % or less.