Method for producing positive electrode active material for lithium ion battery, positive electrode active material for lithium ion battery, electrode for lithium ion battery, and lithium ion battery

A positive electrode active material and lithium-ion battery technology, applied in battery electrodes, lithium batteries, secondary batteries, etc., can solve the problems of unsuitable electrode materials, low discharge voltage, etc., to improve initial discharge capacity, improve conductivity, improve Effect of high-speed charging and discharging characteristics

Inactive Publication Date: 2012-02-15
SUMITOMO OSAKA CEMENT CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0016] However, it is considered that the LiFePO 4 It is an unsuitable electrode material for applications requiring low discharge voltage and high output, such as electric tools and hybrid vehicles

Method used

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  • Method for producing positive electrode active material for lithium ion battery, positive electrode active material for lithium ion battery, electrode for lithium ion battery, and lithium ion battery
  • Method for producing positive electrode active material for lithium ion battery, positive electrode active material for lithium ion battery, electrode for lithium ion battery, and lithium ion battery
  • Method for producing positive electrode active material for lithium ion battery, positive electrode active material for lithium ion battery, electrode for lithium ion battery, and lithium ion battery

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0097] "Example 1"

[0098] Add 3 mol of lithium chloride (LiCl) and 1 mol of phosphoric acid (H 3 PO 4 ) and stirred to obtain lithium phosphate (Li 3 PO 4 ) slurry.

[0099] Next, add 1 mol of iron (II) chloride (FeCl 2 ), using ethylene glycol to replace a part of the water in the slurry in such a manner that the total feed mass of the hydrothermal reaction is 10% by mass, and then add water to make a raw material solution of a total amount of 2L (the total feed mass of the hydrothermal reaction) . In addition, if the reaction concentration of the raw material solution is converted to LiFePO 4 , then becomes 0.5mol / L.

[0100] Next, in order to carry out a hydrothermal reaction, the raw material liquid was put into an autoclave, and after introducing an inert gas, it heated at 180 degreeC and 1.2 MPa for 6 hours to make it react, and filtered and separated the solid and liquid after that.

[0101] Next, the same amount of water as the mass of the separated solid sub...

Embodiment 2

[0104] "Example 2"

[0105] In addition to LiFePO 4 In terms of conversion, the reaction concentration of the raw material solution is set to 1.0 mol / L, that is, the amount of the raw material (lithium chloride, phosphoric acid, and iron (II) chloride) is doubled and the total amount of the raw material solution is adjusted to 2 L. According to Example 1, the positive electrode active material for lithium ion batteries of Example 2 was produced.

Embodiment 3

[0106] "Example 3"

[0107] In addition to LiFePO 4 In terms of conversion, except that the reaction concentration of the raw material solution is set to 1.5 mol / L, that is, except that the amount of the raw material is increased to 1.5 times and the total amount of the raw material solution is adjusted to 2L, the lithium ion of Example 3 is produced according to Example 1. Positive electrode active material for batteries.

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Abstract

Disclosed is a method for producing a positive electrode active material for a lithium ion battery, which is characterized by comprising: a step for preparing a mixture that contains (A) Li3PO4, or an Li source and a phosphoric acid source, (B) at least one source selected from the group consisting of an Fe source, an Mn source, a Co source and an Ni source, water and a water-soluble organic solvent having a boiling point of not less than 150 DEG C, said mixture being adjusted to contain (A) and (B) in such amounts that LiMPO4 (wherein M represents at least one element selected from the group consisting of Fe, Mn, Co and Ni) is produced from (A) and (B) in the mixture at a concentration not less than 0.5 mol / L but not more than 1.5 mol / L; and a step for producing fine LiMPO4 particles having an average primary particle diameter of not less than 30 nm but not more than 80 nm by reacting (A) and (B) under high-temperature high-pressure conditions.

Description

technical field [0001] The invention relates to a manufacturing method of a positive electrode active material for a lithium ion battery, a positive electrode active material for a lithium ion battery, an electrode for a lithium ion battery, and a lithium ion battery. [0002] This application claims priority based on Patent Application No. 2009-080082 filed in Japan on March 27, 2009 and Patent Application No. 2010-038810 filed in Japan on February 24, 2010, and the contents thereof are incorporated herein. Background technique [0003] Compared with conventional aqueous solution batteries such as Ni-Cd batteries and Ni-H batteries, non-aqueous lithium-ion batteries have high energy density and are easy to miniaturize, so they are widely used in portable devices such as mobile phones, portable information terminals, and personal computers. . As the positive electrode material of the non-aqueous lithium-ion battery, LiCoO 2 Be practical and widely used. [0004] However, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/58C01B25/45H01M4/36
CPCC01B25/45H01M4/5825Y02E60/10H01M4/1397H01M4/58H01M10/0525H01M4/485H01M10/052
Inventor 中野雅继山崎晃范
Owner SUMITOMO OSAKA CEMENT CO LTD
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