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Negative electrode for all-solid battery and all-solid battery including same

An all-solid-state battery and negative electrode technology, applied in the direction of battery electrodes, batteries, negative electrodes, etc., can solve problems such as insufficiency, and achieve the effect of high energy density

Active Publication Date: 2016-11-16
KUREHA KAGAKU KOGYO KK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the anode material described in Patent Document 1 has high durability, it is not sufficient as an anode material for an automotive lithium-ion secondary battery that requires absolutely excellent charge-discharge characteristics, and further improvements in energy density are expected

Method used

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  • Negative electrode for all-solid battery and all-solid battery including same
  • Negative electrode for all-solid battery and all-solid battery including same
  • Negative electrode for all-solid battery and all-solid battery including same

Examples

Experimental program
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Effect test

preparation example Construction

[0084]The preparation method of the negative electrode active material layer is not particularly limited, and the negative electrode active material can be prepared by mixing the carbonaceous material and the solid electrolyte material, and the conductive aid and / or binder added as required, and then press-molded Floor. In addition, carbonaceous materials, solid electrolyte materials, and conductive additives and / or binders may also be mixed in a specific solvent to form a slurry, which is then coated, dried, and then pressed. molding to prepare a negative electrode active material layer.

[0085] The negative electrode active material layer usually has a current collector. As the negative electrode current collector, for example, SUS, copper, nickel or carbon can be used, among which Cu or SUS is preferable.

[0086] "Positive electrode active material layer"

[0087] The positive electrode active material layer contains a positive electrode active material and a solid ele...

Embodiment

[0103] Hereinafter, the present invention will be specifically described by way of examples, but the scope of the present invention is not limited to these examples.

[0104] In addition, the following describes the physical property values ​​of the carbonaceous material for non-aqueous electrolyte secondary batteries of the present invention ("The average interplanar distance d of the (002) plane measured by X-ray diffraction method (002) and the crystallite thickness L in the direction of the c-axis c(002) ", "Specific Surface Area", "True Density Calculated According to Butanol Method", "Average Particle Size Measured According to Laser Diffraction Method", " 7 Li-NMR analysis" and "differential thermal analysis measurement") measurement methods, including Examples, and the physical property values ​​described in this specification are all values ​​calculated based on the following methods.

[0105] "The average interplanar spacing d of (002) planes in carbonaceous materia...

preparation example 1

[0130] Put 70kg of petroleum pitch and 30kg of naphthalene with a softening point of 205°C, an H / C atomic ratio of 0.65, and quinoline insolubles of 0.4% into a pressure-resistant container with a stirring blade and an outlet nozzle and an internal volume of 300 liters. Heat to melt and mix for 1 to 2 hours. Then, the heated, melted and mixed petroleum pitch was cooled to about 100°C, the inside of the pressure vessel was pressurized with nitrogen, and the content was extruded through the outlet nozzle to obtain a rope-shaped molded body with a diameter of about 500 μm. Next, crush the rope-shaped molded body so that the ratio (L / D) of its diameter (D) to length (L) is about 1.5 to 2.0, and add the obtained crushed product to 93°C and dissolve Stir, disperse and cool in an aqueous solution of 0.53 mass percent polyvinyl alcohol (saponification degree: 88%) to obtain spherical asphalt molded body slurry. After most of the water was removed by filtration, naphthalene in the asp...

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Abstract

The objective of the present invention is to provide an all-solid battery having high energy density. The aforementioned problem can be solved by means of a negative electrode for an all-solid battery, said electrode including: a carbonaceous material that has a true density, determined by a butanol method of the present invention, of 1.30-1.70 g / cm3, a specific surface area of 0.5-50.0 m2 / g, an average particle size (Dv50) of 1-50 microns, and a butanol true density (Rho Bt (g / cm3)) and combustion peak (T DEG C) according to differential thermal analysis that satisfy belowmentioned formula (1) 300 <= T-100*Rho Bt <= 570 (1); and a solid electrolyte.

Description

technical field [0001] The invention relates to a negative electrode for an all-solid battery and an all-solid battery containing the same. According to the present invention, an all-solid-state battery with high energy density can be obtained. Background technique [0002] In recent years, people have become more concerned about environmental issues, so the industry is researching the installation of large-scale lithium-ion secondary batteries with high energy density and excellent output characteristics in electric vehicles. When used in small portable devices such as mobile phones and notebook computers, the capacity per unit volume becomes particularly important, so graphite materials with relatively high density have been mainly used as negative electrode active materials. However, since the lithium-ion secondary battery for vehicles is large and expensive, it is difficult to replace it midway. Therefore, it requires the same durability as that of an automobile, and i...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/133H01M4/587H01M4/62H01M10/052H01M10/0562H01M10/0565
CPCH01M4/587H01M10/0525H01M10/0562H01M10/0565H01M2220/20Y02E60/10Y02P70/50H01M4/133H01M2004/027
Inventor 青木健太小林正太矢口逹也井本浩多田靖浩園部直弘
Owner KUREHA KAGAKU KOGYO KK
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