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Electrode material, electrode and electrode material manufacturing method

A technology of electrode materials and electrode active substances, which is applied in the direction of electrode manufacturing, battery electrodes, electrode heat treatment, etc., can solve the problem of low electronic conductivity, reduce the unevenness of electronic conductivity, reduce internal resistance, internal resistance small effect

Active Publication Date: 2014-05-28
SUMITOMO METAL MINING CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] However, electrode active materials such as electrode materials containing Li-containing metal oxides that have the property of being able to reversibly deintercalate lithium ions have a problem of low electron conductivity.

Method used

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  • Electrode material, electrode and electrode material manufacturing method
  • Electrode material, electrode and electrode material manufacturing method
  • Electrode material, electrode and electrode material manufacturing method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0114] (Production of Electrode Material)

[0115] Mix 4 mol of lithium acetate (LiCH 3 COO), 2mol of iron (II) sulfate (FeSO 4 ), 2mol of phosphoric acid (H 3 PO 4 ) to prepare a homogeneous slurry-like mixture.

[0116] Next, this mixture was stored in a pressure-resistant airtight container with a capacity of 8 L, and hydrothermal synthesis was performed at 120° C. for 1 hour.

[0117] Next, the obtained precipitate was washed with water to obtain a cake-like electrode active material precursor.

[0118] Next, 150 g (in terms of solid content) of the precursor of the electrode active material, an aqueous polyvinyl alcohol solution in which 20 g of polyvinyl alcohol (PVA) as an organic compound was dissolved in 100 g of water, 50 g of methanol, 50 g of glycerol, and 500 g of zirconia balls with a diameter of 5 mm as media particles were put into a ball mill, and the stirring time of the ball mill was adjusted so that the D90 / D10 of the particle size distribution of the ...

Embodiment 2

[0156] In addition to using 150 g of the precursor of the electrode active material (in terms of solid content), a polyvinyl alcohol aqueous solution in which 20 g of polyvinyl alcohol (PVA) as an organic compound is dissolved in 100 g of water, and a mixed solution of 20 g of methanol and 80 g of glycerin An electrode material and a positive electrode of a lithium ion battery were produced and evaluated in the same manner as in Example 1, except that the slurry was sprayed and dried as a raw material. The evaluation results are shown in Table 1 and Table 2.

[0157] In addition, also in Example 2, the same voltage drop at the end of discharge as in Example 1 was observed.

Embodiment 3

[0159] In addition to using 150 g of the precursor of the electrode active material (in terms of solid content), an aqueous polyvinyl alcohol solution in which 20 g of polyvinyl alcohol (PVA) as an organic compound is dissolved in 100 g of water, and a mixed solution of 80 g of methanol and 20 g of glycerin An electrode material and a positive electrode of a lithium ion battery were produced and evaluated in the same manner as in Example 1, except that the slurry was sprayed and dried as a raw material. The evaluation results are shown in Table 1 and Table 2.

[0160] In addition, also in Example 3, the same voltage drop at the end of discharge as in Example 1 was observed.

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Abstract

Provided are an electrode material, an electrode, and an electrode material manufacturing method for which, when using an electrode active material having a carbonaceous coating formed on the surface thereof as the electrode material, there is little nonuniformity in the amount of loaded carbonaceous coating and which can improve electronic conductivity. Said electrode material comprises aggregates obtained by aggregating electrode active material particles with a carbonaceous coating formed on the surface thereof. The mean particle diameter of the aggregates is 1.0 [mu]m to 100 [mu]m. The volume density is 50 volume% to 80 volume%. The pore distribution of pores present in the aggregates is monophasic and the mean pore diameter in the pore distribution is 0.3 [mu]m or less.

Description

technical field [0001] The present invention relates to an electrode material, an electrode and a manufacturing method of the electrode material, in particular to a positive electrode material for a battery, an electrode material more suitable for a positive electrode material for a lithium-ion battery, an electrode containing the electrode material, and a manufacturing method of the electrode material . [0002] This application claims the priority based on Japanese Patent Application No. 2011-207832 for which it applied to Japan on September 22, 2011, The content is used for this specification. Background technique [0003] In recent years, non-aqueous electrolyte secondary batteries such as lithium ion batteries have been proposed and put into practical use as batteries expected to be reduced in size, weight and capacity. [0004] This lithium ion battery is composed of a positive electrode and a negative electrode having properties capable of reversibly deintercalating ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/58H01M4/36H01M4/485H01M4/505H01M4/525
CPCH01M4/505H01M4/525H01M4/5825H01M4/625H01M4/366H01M4/485H01M2004/021H01M4/663Y02E60/122Y02E60/10H01M4/0471H01M4/136H01M4/1397
Inventor 北川高郎上原贤
Owner SUMITOMO METAL MINING CO LTD
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