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Electrode material, method for manufacturing electrode material, electrode, and lithium ion battery

An electrode material and electrode technology, used in electrode manufacturing, spray manufacturing, secondary batteries, etc., can solve the problems of lithium nickelate toxicity and the instability of the charging state of resources, improve input and output characteristics, improve discharge capacity, The effect of reducing the DC resistance

Inactive Publication Date: 2020-09-15
SUMITOMO OSAKA CEMENT CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Among these, lithium cobaltate and lithium nickelate have problems such as the toxicity of elements, the amount of resources, and the instability of the state of charge.

Method used

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  • Electrode material, method for manufacturing electrode material, electrode, and lithium ion battery
  • Electrode material, method for manufacturing electrode material, electrode, and lithium ion battery

Examples

Experimental program
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Effect test

Embodiment

[0111] Hereinafter, the present invention will be specifically described with reference to Examples and Comparative Examples. In addition, this invention is not limited to the form described in an Example.

[0112] For example, in this embodiment, acetylene black was used as the conductive aid, but carbon materials such as carbon black, graphite, Ketjen black, natural graphite, and artificial graphite may also be used. In addition, the evaluation was performed using a battery using natural graphite as an electrode, but it is of course also possible to use other carbon materials such as artificial graphite and coke, metal negative electrodes such as Li metal and Li alloy, such as Li 4 Ti 5 o 12 Such oxide-based negative electrode materials. And, as the non-aqueous electrolytic solution (non-aqueous electrolytic solution), LiPF containing 1 mol / L was used 6 A non-aqueous electrolyte made by mixing ethylene carbonate and ethyl methyl carbonate at a volume % of 3:7, but LiBF c...

manufacture example 1

[0113] 4 : [1]) Manufacturing>

[0114] LiFePO was carried out by hydrothermal synthesis in the following manner 4 Synthesis.

[0115] Use LiOH as Li source, use NH 4 h 2 PO 4 As P source (B source), FeSO is used 4 ·7H 2 O was used as the Fe source (A source), and these were mixed with pure water so that the mass ratio was Li:Fe:P=3:1:1, and 200 mL of a uniform slurry-like mixture was prepared.

[0116] Next, this mixture was placed in a pressure-resistant airtight container with a capacity of 500 mL, and hydrothermal synthesis was performed at 170° C. for 12 hours. After this reaction, it cooled to room temperature (25 degreeC), and the reaction product of the precipitated cake state was obtained. Next, the precipitate was sufficiently washed several times with distilled water, and the water content was kept at 30% to avoid drying to form a cake-like substance. A certain amount of the cake-like substance was collected, and the powder obtained by vacuum drying at 70° C...

manufacture example 2

[0117] 4 :[2]) Manufacture>

[0118] LiFePO was obtained in the same manner as in Production Example 1 except that the reaction temperature and reaction time were set at 190°C for 12 hours. 4 Electrode active material [2].

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Abstract

An electrode material including a carbonaceous-coated electrode active material having primary particles of the electrode active material and secondary particles that are aggregates of the primary particles, and a carbonaceous film that coats the primary particles of the electrode active material and the secondary particles that are the aggregates of the primary particles, in which a specific surface area, which is obtained using a nitrogen adsorption method, is 4 m2 / g or more and 40 m2 / g or less, a volume of micropores per unit mass is 0.05 cm3 / g or more and 0.3 cm3 / g or less, and an averagemicropore diameter, which is obtained from the volume of the micropores per unit mass and the specific surface area, is 26 nm or more and 90 nm or less.

Description

technical field [0001] The present invention relates to an electrode material, a method for producing the electrode material, an electrode using the electrode material, and a lithium ion battery including a positive electrode composed of the electrode. Background technique [0002] In recent years, nonaqueous electrolyte solution secondary batteries such as lithium ion batteries have been proposed as small, lightweight, and high-capacity batteries, and have been put into practical use. Lithium-ion batteries are composed of a positive electrode and a negative electrode capable of reversibly intercalating and deintercalating lithium ions, and a non-aqueous electrolyte. [0003] Compared with conventional secondary batteries such as lead batteries, nickel-cadmium batteries, and nickel-metal hydride batteries, lithium-ion batteries are lightweight and compact, and have high energy, and are used as power sources for portable electronic devices such as mobile phones and notebook p...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/36H01M4/62H01M4/48H01M4/525H01M10/0525H01M4/58
CPCH01M4/366H01M4/625H01M4/48H01M4/525H01M10/0525H01M4/5825H01M4/1397H01M4/136Y02E60/10H01M4/364C01B32/05C01B25/45C01P2004/80C01P2006/40H01M4/0419H01M4/133H01M4/23H01M4/382
Inventor 大野宏次忍足晓野添勉小山将隆
Owner SUMITOMO OSAKA CEMENT CO LTD