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Positive electrode coating liquid, positive electrode precursor, and nonaqueous lithium electric storage element

A storage element, non-aqueous technology, applied in the field of positive electrode coating liquid, can solve the problems of positive electrode active material falling off and not considered, and achieve the effect of high capacity and low resistance

Active Publication Date: 2020-04-24
ASAHI KASEI KK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0021] However, none of the documents consider at all the following: in the positive electrode active material layer containing carbon materials and lithium transition metal oxides, the decomposition of the alkali metal compound in the pre-doping process is promoted to maximize the capacity; The gas generated during doping causes the positive electrode active material to fall off, resulting in a micro-short circuit

Method used

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  • Positive electrode coating liquid, positive electrode precursor, and nonaqueous lithium electric storage element
  • Positive electrode coating liquid, positive electrode precursor, and nonaqueous lithium electric storage element
  • Positive electrode coating liquid, positive electrode precursor, and nonaqueous lithium electric storage element

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preparation example Construction

[0206] The dispersion method in the preparation of the positive electrode coating liquid is not particularly limited, preferably, a bead mill, a ball mill, a jet mill, a homogenizer, an emulsifying disperser, a rotation-revolving mixer, a homogeneous disperser, a multiaxial disperser can be used. Machines, planetary mixers, film rotary high-speed mixers and other dispersing machines. In addition, it is also possible to disperse by combining two or more of these dispersers. In order to obtain a coating liquid in a good dispersion state, for example, when using a thin film rotary type high-speed mixer, it is preferable to disperse at a peripheral speed of 1 m / s to 50 m / s. When the peripheral speed is 1 m / s or more, various materials can be dissolved or dispersed well, which is preferable. In addition, when the peripheral speed is 50 m / s or less, various materials will not be destroyed by heat or shear force due to dispersion, and re-agglomeration will not occur, so it is prefer...

Embodiment 1

[0391]

preparation example 1a

[0393] Put the crushed coconut shell carbides into a small carbonization furnace, and carry out carbonization treatment at 500°C for 3 hours under nitrogen atmosphere to obtain carbides. Put the obtained carbide into the activation furnace, introduce the steam heated by the preheating furnace into the activation furnace at 1kg / h, and raise the temperature to 900°C for 8 hours for activation. The activated carbide was taken out and cooled under a nitrogen atmosphere to obtain activated activated carbon. The obtained activated carbon was washed with water for 10 hours to remove water, dried in an electric dryer kept at 115° C. for 10 hours, and pulverized with a ball mill for 1 hour to obtain activated carbon 1 .

[0394] The average particle diameter of the activated carbon 1 was measured using a laser diffraction particle size distribution analyzer (SALD-2000J) manufactured by Shimadzu Corporation, and it was 5.5 μm. Moreover, the pore distribution of the activated carbon 1 w...

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Abstract

Provided is a positive electrode precursor having a positive electrode active material layer, wherein the mass proportion A1 of a carbon material in the positive electrode active material layer accounts for 15-65 mass%, the mass proportion A2 of a lithium transition metal oxide in the positive electrode active material layer accounts for 5-35 mass%, the mass proportion A3 of an alkali meatal compound in the positive electrode active material layer accounts for 10-50 mass%, A2 / A1 is 0.10-2.00, A1 / A3 is 0.50-3.00, and the positive electrode active material layer has a peel strength of 0.02-3.00N / cm.

Description

technical field [0001] The present invention relates to a positive electrode coating liquid, a positive electrode precursor, a nonaqueous lithium storage element, and the like using the positive electrode coating liquid. Background technique [0002] In recent years, in order to protect the global environment and save resources and effectively use energy, the power stabilization system of wind power generation or late-night power storage system, the distributed power storage system for households based on solar power generation technology, and the power storage system for electric vehicles Electrical systems, etc. have received attention. [0003] The first requirement for batteries used in these power storage systems is high energy density. As a powerful supplement to high-energy-density batteries that can meet such demands, development of lithium-ion batteries has been actively promoted. [0004] The second requirement is high output characteristics. For example, in a c...

Claims

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Application Information

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IPC IPC(8): H01G11/50H01M4/505H01M4/525H01M4/58H01M4/583H01M4/62H01G11/06H01G11/10H01G11/24H01G11/46H01M4/131H01M4/133H01M4/136H01M4/1391H01M4/1393H01M4/1397H01M4/36
CPCH01M4/131H01M4/1391H01M4/505H01M4/525H01G11/06H01G11/24H01G11/46H01G11/50H01G11/08H01G11/32Y02T10/70H01M4/134H01M4/1395H01M4/364H01M4/5825H01M4/625Y02E60/10H01M4/0404H01G11/10H01M4/136H01M4/133H01M4/62H01M10/4264H01M16/00H01M4/66H01M2004/028
Inventor 梅津和照楠坂启太平川雄一朗冈田宣宏
Owner ASAHI KASEI KK