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

A secondary battery and electrode material technology, applied in the direction of electrode manufacturing, secondary batteries, battery electrodes, etc., can solve the problem of low electronic conductivity and achieve high output characteristics and high durability

Active Publication Date: 2017-04-05
SUMITOMO METAL MINING CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] However, electrode active materials, such as electrode materials comprising lithium phosphate compounds having properties capable of reversibly deintercalating lithium ions, suffer from low electronic conductivity

Method used

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

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0067] As the lithium salt used in the preparation of the dispersion liquid, for example, hydroxides selected from lithium hydroxide (LiOH); lithium carbonate (LiOH); 2 CO 3 ), lithium chloride (LiCl), lithium nitrate (LiNO 3 ), lithium phosphate (Li 3 PO 4 ), dilithium phosphate (Li 2 HPO 4 ) and lithium dihydrogen phosphate (LiH 2 PO 4 ) and other lithium inorganic acid salts; lithium acetate (LiCH 3 COO) and lithium oxalate ((COOLi) 2 ) etc. lithium organic acid salts; and at least one of the group consisting of their water and substances.

[0068] In addition, lithium phosphate (Li 3 PO 4 ) can also be used as the phosphoric acid compound used in the preparation of the dispersion.

[0069] As the metal salt containing Fe used in the preparation of the dispersion liquid, for example, a metal salt selected from iron (II) chloride (FeCl 2 ), iron(II) sulfate (FeSO 4 ) and iron(II) acetate (Fe(CH 3 COO) 2 ) and other iron compounds or their hydrates; iron (III) ...

Embodiment 1

[0158] "Synthesis of Electrode Materials for Lithium-ion Secondary Batteries"

[0159] In 1000mol of lithium phosphate (Li 3 PO 4 ) with 1000mol of iron(II) sulfate (FeSO 4 ) to add water and mix to make the total amount reach 1000L to prepare a uniform slurry-like mixture.

[0160] Next, the mixture was stored in a pressure-resistant airtight container with a capacity of 2000 L, and hydrothermal synthesis was performed at 180° C. for 1 hour to form a precipitate.

[0161] Next, this precipitate was washed with water to obtain a cake-like active material.

[0162] Then, in 5kg of this active material (in terms of solid content), use 0.183kg of polyvinyl alcohol as an organic compound and zirconia balls with a diameter of 1mm as media particles, and carry out dispersion treatment in a bead mill for 1 hour to obtain Prepare a homogeneous slurry.

[0163] Next, the slurry was sprayed and dried in an air atmosphere at 180° C. to obtain granules of the active material coated w...

Embodiment 2

[0171] The electrode material (A2) of Example 2 was obtained in the same manner as in Example 1 except that the firing temperature was set to 760°C.

[0172] And except having used the electrode material (A2) of Example 2, the lithium ion secondary battery of Example 2 was produced by the method similar to Example 1.

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Abstract

Provided are an electrode material for a lithium-ion rechargeable battery including core particles of an active material and a carbonaceous film, in which a powder resistance is 150 [omega].cm or less, and a lithium-ion rechargeable battery produced using the electrode material and a lithium metal exhibits a difference between a sum of a charge capacity with an upper limit voltage of 4.2 V and the lithium-ion rechargeable battery charged at a constant current and a charge capacity with the lithium-ion rechargeable battery charged at a constant voltage for seven days at 4.2 V after the constant current charging and a discharge capacity with the lithium-ion rechargeable battery discharged at a constant current to 2 V after the constant voltage charging reaches 25 mAh / g or less, a method for manufacturing the electrode material, an electrode including the electrode material, and a lithium-ion rechargeable battery including the electrode as a cathode.

Description

technical field [0001] The invention relates to an electrode material for a lithium ion secondary battery and a manufacturing method thereof, an electrode for a lithium ion secondary battery and a lithium ion secondary battery. Background technique [0002] In recent years, non-aqueous electrolyte secondary batteries such as lithium ion secondary batteries have been proposed and put into practical use as batteries expected to be reduced in size, weight and capacity. Lithium-ion secondary batteries are composed of a positive electrode and a negative electrode capable of reversibly deintercalating lithium ions, and a non-aqueous electrolyte. [0003] As a negative electrode active material of a negative electrode material of a lithium ion secondary battery, a carbon-based material or a Li-containing metal oxide having a property of reversibly deintercalating lithium ions is generally used. This Li-containing metal oxide, such as lithium titanate (Li 4 Ti 5 o 12 ). [0004...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/58H01M4/136H01M10/0525
CPCH01M4/136H01M4/5825H01M10/0525C01B25/45H01M10/052H01M4/366H01M4/625Y02E60/10H01M4/0416H01M4/0471H01M4/134H01M4/1391H01M2004/028
Inventor 小山将隆大野宏次北川高郎
Owner SUMITOMO METAL MINING CO LTD
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