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公开(公告)号：US20200176771A1
公开(公告)日：2020-06-04
申请号：US16639377
申请日：2018-09-11
Inventor： Yuji Tani , Satoshi Nishitani , Masaki Deguchi
IPC: H01M4/525 , H01M10/0569 , H01M10/052 , H01M10/0567 , H01M4/02
Abstract: A non-aqueous electrolyte secondary battery including a positive electrode, a separator, a negative electrode facing the positive electrode with the separator interposed therebetween, and an electrolytic solution containing a solvent and an electrolyte. The positive electrode includes a positive electrode material containing a lithium-nickel composite oxide represented by LiaNibM1−bO2, where M represents at least one selected from the group consisting of Na, Mg, Sc, Y, Mn, Fe, Co, Ni, Cu, Zn, Al, Cr, Pb, Sb and B, 0.95≤a≤1.2, and 0.8≤b≤1. The electrolytic solution contains an ester compound C of an alcohol compound A and a carboxylic acid compound B, and contains at least one of the alcohol compound A and the carboxylic acid compound B in an amount of 15 ppm or more, relative to a mass of the electrolytic solution.
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公开(公告)号：US20250029994A1
公开(公告)日：2025-01-23
申请号：US18711765
申请日：2022-10-24
Inventor： Akihiro Kawakita , Masaki Deguchi , Katsuya Inoue , Takeshi Ogasawara
IPC: H01M4/525 , H01M4/02 , H01M4/36 , H01M4/60 , H01M10/052
Abstract: Provided is a positive electrode active material having a high capacity and improved output characteristics. The positive electrode active material included in this non-aqueous electrolyte secondary battery includes a lithium-containing complex oxide having a layered rock salt structure, and a sulfonic acid compound that is present on the surface of the lithium-containing complex oxide. The lithium-containing complex oxide contains 80 mol % or more of Ni, 1.5 mol % or more of Co, and 4 mol % or more of Al based on the total molar number of metal elements excluding Li. The sulfonic acid compound is represented by the general formula I. (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.)
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公开(公告)号：US12062789B2
公开(公告)日：2024-08-13
申请号：US17252923
申请日：2019-02-20
Inventor： Satoshi Nishitani , Masaki Deguchi
IPC: H01M4/58 , H01M4/02 , H01M10/0525 , H01M10/0567 , H01M10/0568
CPC classification number: H01M4/5825 , H01M10/0525 , H01M10/0567 , H01M10/0568 , H01M2004/027 , H01M2300/0025
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.
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公开(公告)号：US20240154167A1
公开(公告)日：2024-05-09
申请号：US18278710
申请日：2022-02-10
Inventor： Takayuki Nakatsutsumi , Masaki Deguchi
IPC: H01M10/0567 , H01M4/131 , H01M4/134 , H01M4/38 , H01M4/505 , H01M4/525 , H01M10/0569
CPC classification number: H01M10/0567 , H01M4/131 , H01M4/134 , H01M4/386 , H01M4/505 , H01M4/525 , H01M10/0569 , H01M2300/0034 , H01M2300/0042
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 a nitrile 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 nitrile compound in the liquid electrolyte is B mass %.
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公开(公告)号：US11916237B2
公开(公告)日：2024-02-27
申请号：US16975797
申请日：2019-02-13
Inventor： Takuya Iwamoto , Satoshi Nishitani , Masaki Deguchi
IPC: H01M4/62 , H01M4/133 , H01M4/36 , H01M4/38 , H01M4/587 , H01M10/0525 , H01M10/0568 , H01M10/0569 , H01M4/02
CPC classification number: H01M4/622 , H01M4/133 , H01M4/364 , H01M4/386 , H01M4/587 , H01M10/0525 , H01M10/0568 , H01M10/0569 , H01M2004/027 , H01M2300/0025
Abstract: A non-aqueous electrolyte secondary battery including a positive electrode, a negative electrode, and an electrolyte. The negative electrode includes a negative electrode active material capable of electrochemically absorbing and releasing lithium, and a binder. The negative electrode active material includes a Si-containing material, and the binder includes at least one cellulose compound selected from the group consisting of a carboxyalkyl cellulose and a salt thereof. The electrolyte includes a non-aqueous solvent, and a lithium salt dissolved in the non-aqueous solvent. The lithium salt includes lithium bis(fluorosulfonyl)imide: LFSI.
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Patent Agency Ranking
公开(公告)号：US20210036367A1
公开(公告)日：2021-02-04
申请号：US16966147
申请日：2019-01-10
Inventor： Chisaki Fujitomo , Satoshi Nishitani , Yasuko Nozaki , Masaki Deguchi
IPC: 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.
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公开(公告)号：US20200176818A1
公开(公告)日：2020-06-04
申请号：US16639384
申请日：2018-09-11
Inventor： Satoshi Nishitani , Yuji Tani , Masaki Deguchi
IPC: H01M10/0568 , H01M10/0525 , H01M4/131 , H01M10/0569 , H01M4/485 , H01M10/0567
Abstract: A non-aqueous electrolyte secondary battery, including a positive electrode, a separator, a negative electrode facing the positive electrode with the separator interposed therebetween, and an electrolytic solution including a solvent and an electrolyte. The negative electrode includes a negative electrode material containing a lithium silicate phase and silicon particles dispersed in the lithium silicate phase. The silicon particles are contained in the negative electrode material in an amount of 30 mass % or more, relative to a total mass of the lithium silicate phase and the silicon particles. The electrolytic solution contains an ester compound C of an alcohol compound A and a carboxylic acid compound B, and contains at least one of the alcohol compound A and the carboxylic acid compound B in an amount of 15 ppm or more, relative to a mass of the electrolytic solution.
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公开(公告)号：US20250167242A1
公开(公告)日：2025-05-22
申请号：US18837335
申请日：2023-02-09
Inventor： Masakazu Togo , Akihiro Kawakita , Katsuya Inoue , Takeshi Ogasawara , Masaki Deguchi
IPC: H01M4/62 , H01M4/02 , H01M4/525 , H01M10/0525
Abstract: This positive electrode active material comprises a lithium-containing composite oxide; the lithium-containing composite oxide contains at least Ni, Ca and Sr; the molar ratio (Ca/Sr ratio) of the content of Ca to the content of Sr is 1 or more; the sum of the content of Ca and the content of Sr in the lithium-containing composite oxide is 0.05% to 1% by mole; the lithium-containing composite oxide contains secondary particles, each of which is formed of aggregated primary particles; and a sulfonic acid compound which is represented by general formula I is present on the surfaces of the secondary particles or on the interfaces between the primary particles. (In the formula, A represents a group 1 element or a group 2 element; R represents a hydrocarbon group; and n is 1 or 2.)
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公开(公告)号：US20250038194A1
公开(公告)日：2025-01-30
申请号：US18712406
申请日：2022-10-24
Inventor： Akihiro Kawakita , Masaki Deguchi , Katsuya Inoue , Takeshi Ogasawara
IPC: H01M4/525 , H01M4/02 , H01M4/505 , H01M10/052 , H01M10/056
Abstract: Provided is a positive electrode active material having high capacity and reduced reaction resistance of a battery. This positive electrode active material for a non-aqueous electrolyte secondary battery includes a lithium-containing composite oxide that has a layered rock salt structure and a sulfonic acid compound present on the surface of the lithium-containing composite oxide, wherein: the lithium-containing composite oxide contains at least 85 mol % of Ni, at least 4 mol % of Al, and 0-1.5 mol % of Co relative to the total mole number of metal elements excepting Li; and the sulfonic acid compound is represented by general formula I. (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.)
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公开(公告)号：US20250038180A1
公开(公告)日：2025-01-30
申请号：US18712088
申请日：2022-10-24
Inventor： Akihiro Kawakita , Masaki Deguchi , Katsuya Inoue , Takeshi Ogasawara
Abstract: The present invention provides a positive electrode active material which has high capacity and improved initial charge and discharge efficiency. 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 50% by mole or more of Ni, 0% by mole to 15% by mole of Co and 0% by mole to 4% by mole of Al 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 1 element or a group 2 element; R represents a hydrocarbon group; and n represents 1 or 2.)
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