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1
US20190020038A1
Publication/Patent Number: US20190020038A1
Publication date: 2019-01-17
Application number: 16/068,544
Filing date: 2016-12-21
Abstract: Provided is an electrode for energy storage devices, which is provided with: a collector substrate; an undercoat layer that is formed on at least one surface of the collector substrate and contains carbon nanotubes; and an active material layer that is formed on the surface of the undercoat layer and contains an active material which contains a titanium-containing oxide. Provided is an electrode for energy storage devices, which is provided with: a collector substrate; an undercoat layer that is formed on at least one surface of the collector substrate and contains carbon nanotubes; and an active material layer that is formed on the surface of ...more ...less
2
US20190013523A1
Publication/Patent Number: US20190013523A1
Publication date: 2019-01-10
Application number: 16/070,010
Filing date: 2017-01-23
Inventor: Shibuya, Masanori  
Abstract: A binder composition for a non-aqueous secondary battery electrode contains a water-soluble polymer including a (meth)acrylamide monomer unit and an amine compound. Percentage content M0 of the (meth)acrylamide monomer unit is at least 40 mass % and not more than 100 mass % relative to 100 mass % of all monomer units of the water-soluble polymer. Content M1 of the amine compound is at least 0.01 parts by mass and not more than 0.5 parts by mass per 100 parts by mass of solid content of the water-soluble polymer. A binder composition for a non-aqueous secondary battery electrode contains a water-soluble polymer including a (meth)acrylamide monomer unit and an amine compound. Percentage content M0 of the (meth)acrylamide monomer unit is at least 40 mass % and not more than 100 mass % ...more ...less
3
US20190067730A1
Publication/Patent Number: US20190067730A1
Publication date: 2019-02-28
Application number: 16/081,775
Filing date: 2017-03-06
Abstract: A sodium-ion conducting (e.g., sodium-sulfur) battery, which can be rechargeable, comprising a microporous host-sulfur composite cathode as described herein or a liquid electrolyte comprising a liquid electrolyte solvent and a liquid electrolyte salt or electrolyte additive as described herein or a combination thereof. The batteries can be used in devices such as, for example, battery packs. A sodium-ion conducting (e.g., sodium-sulfur) battery, which can be rechargeable, comprising a microporous host-sulfur composite cathode as described herein or a liquid electrolyte comprising a liquid electrolyte solvent and a liquid electrolyte salt or electrolyte additive as ...more ...less
4
EP3442061A1
Publication/Patent Number: EP3442061A1
Publication date: 2019-02-13
Application number: 17773497.7
Filing date: 2017-01-13
Abstract: A binder for a nonaqueous electrolyte secondary battery electrode of the present invention includes: a copolymer of vinyl alcohol and an alkali metal-neutralized product of ethylene-unsaturated carboxylic acid; and polyalkylene oxide.
5
EP3424882A1
Publication/Patent Number: EP3424882A1
Publication date: 2019-01-09
Application number: 18188546.8
Filing date: 2017-09-05
Abstract: The present invention relates to alumina, wherein an intensity in an infrared absorption spectrum of the alumina obtained by Fourier-transform infrared spectroscopy is larger than that of a baseline, the baseline being a line segment connecting an intensity at 3,400 cm-1 and an intensity at 3,500 cm-1, wherein a peak having a half width of 90 cm-1 or less does not exist in a range of 3,400 to 3,500 cm-1, and wherein, in thermogravimetric analysis, a mass loss rate A of alumina represented by the following formula (I) is 0.3% or less and a mass loss rate B of alumina represented by the following formula (II) is 0.05% or less. Mass loss rate A%=massgof alumina at25°C−massgof alumina at150°C÷massgof alumina at25°C×100 Mass loss rate B%=massgof alumina at200°C−massgof alumina at260°C÷massgof alumina at25°C×100 The present invention relates to alumina, wherein an intensity in an infrared absorption spectrum of the alumina obtained by Fourier-transform infrared spectroscopy is larger than that of a baseline, the baseline being a line segment connecting an intensity at 3,400 cm-1 and an ...more ...less
6
EP3439076A1
Publication/Patent Number: EP3439076A1
Publication date: 2019-02-06
Application number: 17774529.6
Filing date: 2017-03-21
Abstract: The present invention has an object to provide a lithium secondary battery having excellent battery characteristics and an electrode materializing the battery, by making it easy for an electrolyte solution or a solid electrolyte being an ionic conductor to penetrate between active materials even under a low porosity condition, in a technique for raising the electrode density by making the porosity of the electrode low in order to raise the energy density. The present invention relates to an electrode for a secondary battery comprising a first electrode, a second electrode, a separating layer for spatially separating these electrodes, and an ionic conductor, the electrode comprising a current collector and an active material-containing film on the current collector, wherein a porosity per volume of the active material-containing film is 25% or less; and one or more high-porosity regions where a ratio of a maximum porosity to a minimum porosity by a trend analysis of porosity per area in the film thickness direction of an electrode cross-section is 2.2 or more are present within a range of 500 µm in radius on the electrode plane. The present invention has an object to provide a lithium secondary battery having excellent battery characteristics and an electrode materializing the battery, by making it easy for an electrolyte solution or a solid electrolyte being an ionic conductor to penetrate between ...more ...less
7
EP3435446A1
Publication/Patent Number: EP3435446A1
Publication date: 2019-01-30
Application number: 18184584.3
Filing date: 2018-07-19
Abstract: A method for preparing an inorganic solid electrolyte composite slurry includes: mixing an inorganic solid electrolyte powder with a first solvent and wet grinding an obtained mixture to form a preparatory slurry A; mixing a binder with a second solvent to form a preparatory slurry B; mixing the preparatory slurry A with the preparatory slurry B to obtain the inorganic solid electrolyte composite slurry. The inorganic solid electrolyte composite slurry prepared by the present disclosure effectively solves the problem that it is difficult to reduce the inorganic solid electrolyte powder particle size in the preparation process, or it is difficult to fully dry the inorganic solid electrolyte powder after sand milling. The present disclosure further provides an inorganic solid electrolyte composite slurry prepared by the method, an application of the inorganic solid electrolyte composite slurry, and a lithium-ion battery having the inorganic solid electrolyte composite slurry. A method for preparing an inorganic solid electrolyte composite slurry includes: mixing an inorganic solid electrolyte powder with a first solvent and wet grinding an obtained mixture to form a preparatory slurry A; mixing a binder with a second solvent to form a preparatory ...more ...less
8
EP3439088A1
Publication/Patent Number: EP3439088A1
Publication date: 2019-02-06
Application number: 17775432.2
Filing date: 2017-03-30
Inventor: Oota, Ayako  
Abstract: The present invention aims to provide a composition for a lithium secondary battery electrode which is excellent in dispersibility of an active material and adhesiveness, capable of maintaining an appropriate viscosity for a long period of time, and capable of providing a high-capacity lithium secondary battery even when the amount of a binder is small. Provided is a composition for a lithium secondary battery electrode including: an active material; a polyvinyl acetal resin; and an organic solvent, the polyvinyl acetal resin having a structural unit having a hydroxyl group represented by the following formula (1), a structural unit having an acetal group represented by the following formula (2), and a structural unit having a carboxyl group, the polyvinyl acetal resin containing 45 to 95 mol% of the structural unit having a hydroxyl group represented by the following formula (1): where R1 represents a hydrogen atom or a C1-C20 alkyl group. The present invention aims to provide a composition for a lithium secondary battery electrode which is excellent in dispersibility of an active material and adhesiveness, capable of maintaining an appropriate viscosity for a long period of time, and capable of providing a ...more ...less
9
EP3429019A1
Publication/Patent Number: EP3429019A1
Publication date: 2019-01-16
Application number: 17763248.6
Filing date: 2017-03-07
Abstract: According to one embodiment, a nonaqueous electrolyte battery includes a positive electrode, a negative electrode and a nonaqueous electrolyte. The negative electrode includes a negative electrode active material and a binder. The negative electrode active material contains monoclinic titanium dioxide or Li4+aTi5O12 (here, -0.5 ≤ a ≤ 3). The binder includes polyvinylidene fluoride with a molecular weight of 400,000 to 1,000, 000. The negative electrode satisfies a formula (I) below. The nonaqueous electrolyte contains at least one of difluorophosphate and monofluorophosphate. 0.1≤P2/P1≤0.4 wherein P1 is an intensity of a peak that appears within a range of 689 to 685 eV in a spectrum according to photoelectron spectrometry of a surface of the negative electrode, and P2 is an intensity of a peak that appears within a range of 684 to 680 eV in the spectrum. According to one embodiment, a nonaqueous electrolyte battery includes a positive electrode, a negative electrode and a nonaqueous electrolyte. The negative electrode includes a negative electrode active material and a binder. The negative electrode active material contains ...more ...less
10
EP3424054A1
Publication/Patent Number: EP3424054A1
Publication date: 2019-01-09
Application number: 17763806.1
Filing date: 2017-03-03
Assignee: Seeo, Inc
11
EP3442053A1
Publication/Patent Number: EP3442053A1
Publication date: 2019-02-13
Application number: 17779075.5
Filing date: 2017-04-03
Abstract: Provided are an energy storage device sufficiently having both durability performance and high-rate input/output performance and also a method for producing the energy storage device. The energy storage device of the present embodiment includes a positive electrode having a positive active material layer containing an active material in the form of particles. The positive active material layer contains primary particles of the active material and secondary particles formed by aggregation of a plurality of primary particles. The proportion of primary particles relative to all particles of the active material in the positive active material layer is 5% or more and 40% or less. The method for producing an energy storage device of the present embodiment includes forming a positive active material layer from a composite containing at least secondary particles of an active material to prepare a positive electrode having the positive active material layer, and assembling an energy storage device using the prepared positive electrode. In the preparation of the positive electrode, the positive active material layer is pressed to deagglomerate some of the secondary particles into primary particles, and the proportion of primary particles relative to all particles of the active material in the positive active material layer is adjusted to 5% or more and 40% or less. Provided are an energy storage device sufficiently having both durability performance and high-rate input/output performance and also a method for producing the energy storage device. The energy storage device of the present embodiment includes a positive electrode having a ...more ...less
12
US20190081361A1
Publication/Patent Number: US20190081361A1
Publication date: 2019-03-14
Application number: 16/184,454
Filing date: 2018-11-08
Abstract: A core (u1, u2) around which a nonaqueous electrolyte secondary battery separator is to be wound. A side surface of the core (u1, u2) has a depression (20). This makes it possible, in a case where cores (separator cores) are stored by being stacked while still wet after cleaning, to prevent damage to a core caused by a problem where cores stick together and an core lower in a stack falls when a core higher in the stack is removed. A core (u1, u2) around which a nonaqueous electrolyte secondary battery separator is to be wound. A side surface of the core (u1, u2) has a depression (20). This makes it possible, in a case where cores (separator cores) are stored by being stacked while still wet after ...more ...less
13
US10263288B2
Publication/Patent Number: US10263288B2
Publication date: 2019-04-16
Application number: 15/550,074
Filing date: 2015-02-16
Abstract: A production method is provided for producing a lithium ion secondary battery. The lithium ion secondary battery has an external casing that houses an electrolytic solution and a power generating element. The power generating element includes a positive electrode and a negative electrode layered with a separator. The production method includes first charging the lithium ion secondary battery at a voltage range of 4.0 V or lower and then opening the external casing of the lithium ion secondary battery that has been charged at a range of 4.0 V or lower to discharge gas inside the lithium ion secondary battery to the exterior. Next, the production method further includes re-sealing the external casing and charging the lithium ion secondary battery from which the gas has been discharged until the cell voltage is greater than 4.0 V. A production method is provided for producing a lithium ion secondary battery. The lithium ion secondary battery has an external casing that houses an electrolytic solution and a power generating element. The power generating element includes a positive electrode and a negative ...more ...less
14
US20190097209A1
Publication/Patent Number: US20190097209A1
Publication date: 2019-03-28
Application number: 16/202,268
Filing date: 2018-11-28
Abstract: An electrode mixture paste for a sodium secondary battery contains a positive electrode active material capable of being doped and dedoped with a sodium ion, an electroconductive material, a binder, an organic solvent, and an acid having a valence number of 2 or more. The electrode mixture paste for a sodium secondary battery gives little change in viscosity with lapse of time even when there are no special facilities. An electrode mixture paste for a sodium secondary battery contains a positive electrode active material capable of being doped and dedoped with a sodium ion, an electroconductive material, a binder, an organic solvent, and an acid having a valence number of 2 or more. The ...more ...less
15
US20190097239A1
Publication/Patent Number: US20190097239A1
Publication date: 2019-03-28
Application number: 16/202,946
Filing date: 2018-11-28
Assignee: LG CHEM, LTD.
Abstract: The present application relates to a cathode for a lithium-sulfur battery and a method of preparing the same. More specifically, the cathode for a lithium-sulfur battery according to an exemplary embodiment of the present application includes: a cathode active part including a sulfur-carbon composite; and a cathode coating layer including an amphiphilic polymer provided on at least one portion of a surface of the cathode active part and including a hydrophilic portion and a hydrophobic portion. The present application relates to a cathode for a lithium-sulfur battery and a method of preparing the same. More specifically, the cathode for a lithium-sulfur battery according to an exemplary embodiment of the present application includes: a cathode active part including a ...more ...less
16
EP3467910A1
Publication/Patent Number: EP3467910A1
Publication date: 2019-04-10
Application number: 18202526.2
Filing date: 2011-01-18
Abstract: Composite materials and methods of forming composite materials are provided. The composite materials described herein can be utilized as an electrode material for a battery. In certain embodiments, the composite material includes greater than 0 % and less than about 90 % by weight silicon particles, and greater than 0 % and less than about 90 % by weight of one or more types of carbon phases. At least one of the one or more types of carbon phases can be a substantially continuous phase. The method of forming a composite material can include providing a mixture that includes a precursor and silicon particles, and pyrolysing the precursor to convert the precursor into one or more types of carbon phases to form the composite material. Composite materials and methods of forming composite materials are provided. The composite materials described herein can be utilized as an electrode material for a battery. In certain embodiments, the composite material includes greater than 0 % and less than about 90 % by ...more ...less
17
EP3467908A1
Publication/Patent Number: EP3467908A1
Publication date: 2019-04-10
Application number: 18768306.5
Filing date: 2018-03-16
Assignee: LG Chem, Ltd.
Abstract: The present disclosure relates to a method for manufacturing an electrode for a solid state battery and an electrode obtained thereby. In the electrode, the electrode active material particles are at least partially surface-coated with a first coating layer including a mixture of a first polymer electrolyte and a conductive material. In addition, the first coating layer in the electrode is formed by an electrospraying and/or electrospinning process. The present disclosure relates to a method for manufacturing an electrode for a solid state battery and an electrode obtained thereby. In the electrode, the electrode active material particles are at least partially surface-coated with a first coating layer including a mixture ...more ...less
18
US10270098B2
Publication/Patent Number: US10270098B2
Publication date: 2019-04-23
Application number: 15/309,248
Filing date: 2015-04-23
Abstract: The present invention relates to a positive electrode active material for a lithium ion battery and, more specifically, to a positive electrode active material for a lithium ion battery, having improved initial capacitance and charging and discharging efficiency due to increased electrical conductivity or ion conductivity. The positive electrode active material for a lithium ion battery of the present invention contains lithium vanadium phosphate (Li3V2(PO4)3) and lithium zirconium phosphate (Li3Zr2(PO4)3) formed on an external surface of the lithium vanadium phosphate. The positive electrode active material for a lithium ion battery comprising lithium vanadium zirconium phosphate (Li3V2-xZrx(PO4)3) particles, which is prepared by a preparation method of the present invention, has excellent structural stability and ion conductivity as well as high capacitance. The present invention relates to a positive electrode active material for a lithium ion battery and, more specifically, to a positive electrode active material for a lithium ion battery, having improved initial capacitance and charging and discharging efficiency due to increased ...more ...less