209results about How to "Excellent cycle characteristics" patented technology

According to the lithium ion battery electrolyte and the lithium ion battery provided by the invention, specific dimethyl sulfate, the compound shown in the general formula (I) and 1-ethyl-3-methylimidazolium difluorophosphate are added into the electrolyte to achieve a synergistic effect to form good SEI, so that the properties such as initial resistance characteristic, high-temperature durability, cycle characteristic and the like are improved; and the requirements of application scenes such as electronic equipment and vehicle batteries on the battery are met.

Provided is a carbon nanotube dispersion liquid containing carbon nanotubes, a dispersant, and a solvent, the carbon nanotube dispersion liquid having particle size distribution peaks in the particle size range of 0.1 [mu] m to 3 [mu] m and in the particle size range of 10 [mu] m to 100 [mu] m in a volume-based particle size distribution curve measured by a laser diffraction / scattering particle size distribution measurement method, and having particle size distribution peaks in the particle size range of 0.1 [mu] m to 3 [mu] m, and having particle size distribution peaks in the particle size range of 10 [mu] m to 100 [mu] m. And the cumulative particle diameter D50 is 4 [mu] m or more.

The invention provides a supercritical reactor, which comprises a pressure vessel cylinder, a reactor internal is arranged in the pressure vessel cylinder, and the reactor internal accommodates a peripheral fuel assembly and a middle fuel assembly; an inlet connecting pipe and an outlet connecting pipe are arranged on the pressure container barrel, a lower cavity is formed in the bottom of the pressure container barrel, and one ends of the peripheral fuel assembly and the middle fuel assembly extend to the lower cavity or are arranged above the lower cavity; coolant introduced by the inlet connecting pipe flows to the lower cavity through the peripheral fuel assembly and returns to the middle fuel assembly so as to be discharged from the outlet connecting pipe. The peripheral fuel assembly and the middle fuel assembly are arranged, a coolant entering through the inlet connecting pipe is heated downwards through the peripheral fuel assembly and then enters the middle fuel assembly to be heated, the two-flow reactor core design is adopted, fast reactor core and thermal spectrum series connection are achieved, the height of the reactor core and the density change of the coolant can be reduced, and the reactor core is more compact. The reactor core height neutron distribution is more uniform, the temperature level of a fuel cladding is reduced, and the fuel circulation characteristic is improved.

The present invention relates to a carbon nanotube dispersion comprising a carbon nanotube (CNT) having a Brunauer-Emmet-Teller (BET) specific surface area of 800 m2 / g or more, a dispersant, and a water-based solvent, in which the dispersant comprises a polymeric dispersant comprising an amine and a phenolic compound comprising two or more aromatic rings.

This invention belongs to the field of hard carbon technology, specifically relating to a bamboo-based and lignin-based hard carbon composite material, its preparation method, and its applications. The process involves pretreating raw materials to obtain pretreated material; pretreating the pretreated material with an acidic oxidant to obtain acidic oxidant pretreated material; pre-oxidizing the acidic oxidant pretreated material to obtain pre-oxidized material; pre-carbonizing the pre-oxidized material under a protective atmosphere to obtain pre-carbonized material; pulverizing the pre-carbonized material to obtain pulverized material; acid washing followed by water washing to obtain purified material; soaking the purified material in acid, filtering, and drying to obtain soaked material; mixing the soaked material with a modifier, and high-temperature coating and carbonizing under a protective atmosphere to obtain bamboo-based coated hard carbon or lignin-based coated hard carbon. Mixing the two types of hard carbon and carbon coating yields a bamboo-based and lignin-based hard carbon composite material, which is used in negative electrode sheets and batteries. When applied to batteries, the hard carbon composite material of this invention can improve battery energy density.

A battery includes: a first electrode; a second electrode; and an electrolyte solution, wherein the first electrode includes a current collector and an active material layer, the active material layer contains BiNi, and the BiNi has a crystal structure, a space group of the crystal structure belonging to C2 / m.

Provided is a binder for nonaqueous electrolyte secondary battery electrodes, which is capable of suppressing the degree of swelling of an electrode. A crosslinked polymer containing a carboxyl group or a salt thereof is used as the binder for nonaqueous electrolyte secondary battery electrodes. The cross-linked polymer or a salt thereof has a particle diameter measured in an acetonitrile medium of 0.60-1.0 [mu] m in terms of volume-based median diameter, and a water swelling degree at pH 8 of 25-40.

The present invention is a negative electrode active material for a non-aqueous electrolyte secondary battery, the negative electrode active material comprising negative electrode active material particles, the negative electrode active material particles containing silicon compound particles, the silicon compound particles containing a silicon compound (SiOx: 0.5 < = x < = 1.6), the silicon compound particles containing a Li compound, at least a portion of the negative electrode active material particles are covered with a carbon coating film, and the amount of the carbon coating film covered on the negative electrode active material particles is more than 0% by mass but not more than 1% by mass with respect to the total of the silicon compound particles and the carbon coating film. The carbon coating film contains a coating film comprising at least one of a compound having an O-C = O bond and a compound having a C-C bond, and the silicon compound particles contain crystalline Li2SiO3 as the Li compound. As a result, it is possible to provide a negative electrode active material for nonaqueous electrolyte secondary batteries, which has high capacity and excellent cycle characteristics and initial efficiency.

A separator for an energy storage device is provided, comprising: a porous substrate, a layer containing inorganic filler disposed on a first main surface of the porous substrate, and a layer containing a thermoplastic polymer disposed on the surface of the layer containing inorganic filler and on a second main surface of the porous substrate, wherein the coverage area S of the layer containing thermoplastic polymer on the surface of the layer containing inorganic filler is provided. c The coverage area S of the thermoplastic polymer-containing layer on the second main surface of the porous substrate is between 30% and 100%. p The thickness t of the thermoplastic polymer layer on the inorganic filler layer exceeds 0% and is less than 30%. c The thickness t of the thermoplastic polymer-containing layer on the second main surface of the porous substrate p Satisfy t c / t p The relationship is >1.00.

Provided are a negative electrode and a secondary battery with which cycle characteristics can be improved. The negative electrode is provided with: a negative electrode current collector; a negative electrode active material layer; a first layer provided between the negative electrode current collector and the negative electrode active material layer; and a second layer provided on the negative electrode active material layer. The negative electrode current collector contains at least one of copper, nickel and iron, the negative electrode active material layer contains silicon, and the first layer contains silicon, a metal element constituting the negative electrode current collector, and at least one of titanium, nickel, zinc, silver, iron, boron, indium and germanium. The second layer includes silicon and at least one of titanium, nickel, zinc, silver, iron, boron, indium, and germanium.

The problem to be solved by the present invention is to provide a secondary battery module having excellent cycle characteristics even when a secondary battery, the volume of which varies due to charge and discharge, is used. In order to solve the problem, this secondary battery module is provided with a battery laminate in which a plurality of secondary batteries are laminated, and a pair of end plates disposed at both ends of the battery laminate in the lamination direction, and is also provided with: a buffer material that is provided between the battery laminate and the pair of end plates; a plurality of second electrodes disposed between adjacent secondary batteries and / or between the battery stack and the end plate; in a first direction orthogonal to the stacking direction of the battery stack, one end of the buffer material is formed as a thick portion having a greater length in the stacking direction, and the other end is formed as a thin portion having a smaller length in the stacking direction than the thick portion.

An object of the present application is to provide a battery active material capable of maintaining good initial coulombic efficiency and cycle characteristics and increasing discharge capacity to, for example, 800 mAh / g or more, a battery composite active material containing the battery active material, and a secondary battery containing these materials in a negative electrode. The battery active material of the present application is an amorphous silicon-based material composed of elements including Si, O, and C, and has a solid solution structure in which Si, O, and C are mixed at the atomic level. The battery active material of the present application is characterized by having a specific surface area of 0.1 m2 / g or more and less than 20 m2 / g, a pore volume of 0.01 cm3 / g or more and less than 0.5 cm3 / g, and a pore diameter of 2 nm or more and less than 20 nm. 29 The ratio (A / B) of the total value A of the integral values of the respective peaks attributed to SiO2C2 and SiO3C to the integral value B of the peak attributed to SiO4 in the range of chemical shifts 20 ppm to -150 ppm of the Si-NMR spectrum is 0.5 or more and 5.0 or less.

The present invention relates to: a negative electrode slurry containing a negative electrode active material, single-walled carbon nanotubes (SWCNTs), an organic binder, and an organic solvent; a negative electrode containing the negative electrode slurry; and a lithium secondary battery. The negative electrode slurry contains a negative electrode active material using silicon-based particles having a high charge / discharge capacity, generates little hydrogen gas during the production and storage of the slurry, and achieves an excellent capacity retention rate during charge / discharge.

A non-aqueous electrolyte secondary battery, a method for manufacturing the same, and a slurry suitable for forming an electrode slurry layer of the non-aqueous electrolyte secondary battery, the non-aqueous electrolyte secondary battery having a positive electrode slurry layer, a separator, and a negative electrode slurry layer in this order, the positive electrode slurry layer is configured from a slurry in which a positive electrode active material is dispersed in a non-aqueous electrolyte solution containing a solvent having a relative dielectric constant of 5.0 or more and a viscosity of less than 2.0 mPas, and the negative electrode slurry layer is configured from a slurry in which a negative electrode active material is dispersed in a non-aqueous electrolyte solution containing a solvent having a relative dielectric constant of 5.0 or more and a viscosity of less than 2.0 mPas.

The present invention addresses the problem of providing a lithium ion secondary battery having excellent cycle characteristics and corrosion resistance, which are important in an in-vehicle secondary battery such as an electric vehicle, and also addresses the problem of providing an electrolyte solution with which it is possible to produce such a lithium ion secondary battery. An electrolyte solution for a lithium ion secondary battery, which is obtained by dissolving an electrolyte in a non-aqueous solvent, and which is characterized in that the electrolyte solution for a lithium ion secondary battery contains cyanomethyl formate and / or 2-cyanoethyl formate. A lithium ion secondary battery provided with a positive electrode, a negative electrode, a separator, and the electrolyte solution for lithium ion secondary batteries.

This invention provides a lithium secondary battery, comprising: a battery casing; an electrode assembly housed within the battery casing; and an electrolyte, wherein the electrode assembly includes a positive electrode comprising a positive electrode active material, a separator, and a negative electrode comprising a negative electrode active material, and the electrolyte comprises LiPF6 as a lithium salt and ethylene carbonate as an organic solvent, wherein the ratio of the diameter (r) to the height (h) of the battery casing of the lithium secondary battery (shape factor ratio) is 0.4 or more, and satisfies the condition of mathematical formula (1), wherein in mathematical formula (1), h is the height (mm) of the battery casing, r is the diameter (mm) of the battery casing, and W LiPF6 The amount of LiPF6 relative to the total weight of the electrolyte, expressed as a percentage (%), W EC It is the amount of ethylene carbonate relative to the total weight of the electrolyte, expressed as a percentage (%), and W EL This represents the total weight (g) of the electrolyte contained in the lithium secondary battery. [Mathematical formula (1)]

Provided are: a positive electrode active material layer capable of forming an all-solid-state battery having excellent cycle characteristics; an electrode provided with the positive electrode active material layer; and a semi-solid-state battery or all-solid-state battery provided with the electrode. A positive electrode active material layer containing a positive electrode active material (A), a solid electrolyte (B), and a binder (C), the binder (C) containing a vinylidene fluoride copolymer, the vinylidene fluoride copolymer being a copolymer of vinylidene fluoride and hexafluoropropylene or a copolymer of vinylidene fluoride and chlorotrifluoroethylene, the vinylidene fluoride copolymer contains the structural units derived from vinylidene fluoride in an amount of from 83.0% by mass to 97.0% by mass (inclusive) when the total structural units of the vinylidene fluoride copolymer are 100.0% by mass.

A secondary battery includes a positive electrode for a secondary battery, a negative electrode, and an electrolytic solution. The positive electrode for a secondary battery includes a positive electrode active material for a secondary battery. The positive electrode active material for a secondary battery includes first particles and second particles. The first particles have a median diameter D50 of greater than or equal to 15 micrometers and less than or equal to 30 micrometers and each include a lithium-containing compound. The second particles have a median diameter D50 of greater than or equal to 1 micrometer and less than or equal to 10 micrometers and each include a center part that includes a lithium-containing compound and a covering part provided on a surface of the center part. The covering part includes, in order from a side closer to the center part, an underlayer and a surface layer. The underlayer includes a reaction product of a first metal alkoxide in which no alkyl group is bonded to a metal atom. The surface layer includes a reaction product of a second metal alkoxide in which the alkyl group is bonded to the metal atom. The reaction product of the second metal alkoxide is bonded to the reaction product of the first metal alkoxide.

A secondary battery provided with a positive electrode provided with a positive electrode current collector and a positive electrode mixture layer that is arranged on the positive electrode current collector and contains a positive electrode active material, a negative electrode provided with a negative electrode current collector and a negative electrode mixture layer that is arranged on the negative electrode current collector and contains a negative electrode active material, and an exterior material, the positive electrode and the negative electrode are stacked in the thickness direction, the positive electrode mixture layer contains fibrous carbon, and when the secondary battery is discharged from a fully charged state to an end-of-discharge voltage at a current of 5C, the end-of-discharge voltage of the secondary battery is greater than the end-of-discharge voltage of the secondary battery, and the end-of-discharge voltage of the secondary battery is greater than the end-of-discharge voltage of the secondary battery. When the standard deviation of the temperature rise at the temperature measurement point on the exterior material is set as sigma (DEG C) and the rated capacity of the battery is set as A (Ah), sigma / A is 0.35 (DEG C / Ah) or less.

This invention provides a method for manufacturing a sheet for an all-solid-state secondary battery, a method for manufacturing an all-solid-state secondary battery manufactured by the method, and the sheet for an all-solid-state secondary battery and the all-solid-state secondary battery. In the method for manufacturing the sheet for the all-solid-state secondary battery, an inorganic solid electrolyte composition containing an inorganic solid electrolyte and a dispersion medium is coated onto a substrate to form a film. Either or both of the preparation temperature of the inorganic solid electrolyte composition and the temperature before coating are set to 35-90°C.

The present invention relates to a negative electrode active material containing Si particles, first particles, and second particles, the first particles having a volume expansion rate due to Li adsorption of 0-80%, and the second particles having a volume expansion rate due to Li adsorption of 100-300%.

The all-solid-state battery of the present invention comprises: a stack formed by stacking a positive electrode having a positive electrode collector layer and a positive electrode active material layer and a negative electrode having a negative electrode collector layer and a negative electrode active material layer via a solid electrolyte layer; a pair of positive electrode external electrodes and negative electrode external electrodes, which are arranged on any pair of opposite side surfaces of the stack, the positive electrode collector layer is joined to the positive electrode external electrode, the negative electrode collector layer is joined to the negative electrode external electrode, and in at least one of the positive electrode collector layer or the negative electrode collector layer, the thickness of the portion joined to the positive electrode external electrode or the negative electrode external electrode is thicker than the other portions.

The present invention relates to a negative electrode material for a lithium ion secondary battery, a negative electrode for a lithium ion secondary battery, and a lithium ion secondary battery. A negative electrode material for a lithium ion secondary battery according to the present invention contains a carbon material satisfying the following (1) and (2). (1) The particle diameter D90 / D10 on a volume basis is greater than 2.0 and less than 4.3. (2) N / S, which is the value obtained by dividing the number N of particles having a circle-equivalent diameter of 5 [mu] m or less on the basis of the number reference among 10,000 total measured particles by the specific surface area S obtained by nitrogen adsorption measurement at 77 K, is 750 (particles * g / cm2) or more.

In one embodiment of the present invention, the porous carbon particles used in the positive electrode of an air battery for forming a porous carbon film satisfy all of the following a) to g): a) The full width at half maximum (FWHM) of the D band peak in the Raman spectrum is 30 cm. ‑1 Above and 60cm ‑1 Below; b) The full width at half maximum (FWHM) of the G-band peak in the Raman spectrum is 32 cm. ‑1 Above and 80cm ‑1 The following are examples: c) The ratio of the intensity of the D band peak to the intensity of the G band peak in the Raman spectrum, i.e., an R value of 0.8 or higher; d) The surface spacing of the (002) plane of carbon based on X-ray diffraction (XRD) is d 002 e) The portion with a diameter greater than 0.336 nm and less than 0.355 nm; e) The volume of pores with a diameter greater than 1 nm and less than 1000 nm, determined by the BJH method from the adsorption isotherm obtained by nitrogen adsorption, is 1.5 cm³. 3 / g or more and 10.0cm 3 / g or less; f) The volume of pores with a diameter of 1 nm or more and less than 100 nm, determined by the BJH method from the adsorption isotherm obtained by nitrogen adsorption, is 1.0 cm³. 3 / g or more and 8.0cm 3 / g or less; g) The specific surface area obtained by the BET method from the adsorption isotherm obtained by nitrogen adsorption is 500 cm². 2 / g or more and 2000cm 2 / g or less.

The present invention provides a pre-dispersant composition including a hydrogenated nitrile-butadiene rubber and an amide -based dispersion medium, wherein viscosity (Brookfield viscometer, 25°C) is in a range of 70 cPs to 3,000 cPs, and a moisture content is 0.9 wt% or less, an electrode slurry composition including the same, and an electrode for a secondary battery and a secondary battery which are prepared by using the electrode slurry composition.

The present invention relates to a porous polyimide film, a separator for a secondary battery and a secondary battery. A porous polyimide film has a plurality of holes, the average flatness of the plurality of holes is in the range of 0.1 to 0.7, the coefficient of variation of the distance between the holes is in the range of 0.10 to 0.40, and the surface and the back are connected through the plurality of holes.

The present invention provides a resin-attached fiber characterized by: including conductive fibers having an average fiber diameter of 10-5000 nm and an average aspect ratio of 30 or greater, and a thermoplastic resin that is integrated with the conductive fibers by contacting the surface of at least a portion of the conductive fibers; and the powder volume resistivity of the resin-attached fiber being 10 Ω•cm or less when the density is 0.8 g / cm3.

In a nonaqueous electrolyte secondary battery as an example of an embodiment, a positive electrode contains a lithium transition metal composite oxide containing Ni, Co, M1 (M1 is at least one element selected from Ca and Sr), and M2 (M2 is at least one element selected from Nb, Zr, Ti, W, Al, Mo, Fe, B, P, Mg, and Si). The lithium transition metal composite oxide is a secondary particle formed by aggregating primary particles, and the average porosity of the secondary particle is 1-5%. The negative electrode has an M2-containing coating film formed on the surface of the negative electrode mixture layer.

The present application provides an electrolyte capable of improving the high-temperature storage characteristics and cycle characteristics of an electrochemical device. The electrolyte contains at least one compound represented by General Formula (1-1) (in the formula, R 101 is an alkyl group having 1 to 7 carbon atoms which can be fluorinated, etc., and can also contain O, etc. in the structure) and General Formula (1-2) (in the formula, R 102 and R 103 (i) are independently H, F, an alkyl group having 1 to 7 carbon atoms which can be fluorinated, etc., or (ii) are a hydrocarbon group which is linked to each other to form a 5- or 6-membered heterocycle together with the nitrogen atom, and can also contain O, etc. in the structure).

The electricity storage element includes a positive electrode, a negative electrode, a separator, and an electrolyte solution. The content (Vemc) of ethyl methyl carbonate in the electrolyte solution is 26.5-45.0 vol%. The ethylene carbonate content Vec in the electrolyte solution is 9.0-33.5 vol%. The content (Vdmc) of dimethyl carbonate in the electrolyte solution is 29.5-41.0 vol%. The diethyl carbonate content (Vdec) in the electrolyte solution is 0.0-0.2 vol%. The content (Vpc) of propylene carbonate in the electrolyte solution is 0.0-10.5 vol%. The content Vfec of fluoroethylene carbonate in the electrolyte solution is at least 0.0 vol%. The total of Vemc, Vec, Vdmc, Vdec, Vpc, and Vfec is 97.0 to 100 vol%.