Production method of lithium-containing composite oxide and lithium-containing composite oxide

A technology of composite oxides and manufacturing methods, applied in chemical instruments and methods, nickel compounds, inorganic chemistry, etc., can solve the problem of cycle characteristics degradation and achieve the effect of improving cycle characteristics

Active Publication Date: 2016-03-09
SUMITOMO CHEM CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In addition, it is known that if the crystallite diameter of the (110) plane is larger than 100 nm, the cycle characteristics will be reduced.

Method used

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  • Production method of lithium-containing composite oxide and lithium-containing composite oxide
  • Production method of lithium-containing composite oxide and lithium-containing composite oxide
  • Production method of lithium-containing composite oxide and lithium-containing composite oxide

Examples

Experimental program
Comparison scheme
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specific Embodiment approach

[0112] Hereinafter, although an Example is given and this invention is demonstrated concretely, this invention is not limited to the following Example. In the following examples, Examples 1 to 14 are examples, and Examples 15 to 19 are reference examples. Various evaluations and measurements of each example were performed by the following methods.

[0113] [Measurement of Specific Surface Area (SSA)]

[0114] The specific surface area (SSA) of the hydroxide and the lithium-containing composite oxide was measured by the nitrogen adsorption BET method using a specific surface area measuring device (manufactured by Mountech, device name: HMmodel-1208).

[0115] The measurement of the specific surface area of ​​the hydroxide was degassed at 105° C. for 30 minutes.

[0116] The measurement of the specific surface area of ​​the lithium-containing composite oxide was degassed at 200° C. for 20 minutes.

[0117] [Measurement of median particle diameter D50]

[0118] The median dia...

example 1

[0136] [Example 1] Production example using the seeding method

[0137] Nickel(II)sulfate*hexahydrate, cobalt(II)sulfate*heptahydrate, and manganese(II)sulfate*hydrate were weighed such that the molar ratio of each element of Ni, Co, and Mn was 0.5:0.2:0.3. Next, these were dissolved in distilled water so that the total concentration thereof would be 1.5 mol / L to prepare an aqueous solution of a transition metal salt.

[0138] Sodium hydroxide was dissolved in water to prepare a 6 mol / L aqueous sodium hydroxide solution. Ammonium sulfate was dissolved in water to prepare a 0.83 mol / L ammonium salt aqueous solution.

[0139] A seed crystal is produced by a co-precipitation method, and the seed crystal is used to obtain a hydroxide by a seeding method.

[0140] Distilled water was put into the 1st reaction tank of capacity 30L, and it heated to 50 degreeC. While flowing nitrogen gas in the first reaction tank, the stirring power is 1.3kw / m 3 While stirring the initial soluti...

example 2～6

[0147] A lithium-containing composite oxide powder was obtained in the same manner as in Example 1. However, the growth time of crystals was the time shown in Table 1. Hydroxide, lithium carbonate, and zirconium oxide or tungsten oxide were mixed and calcined under the conditions described in Table 2 to obtain a lithium-containing composite oxide. However, the mixing ratio of zirconia or tungsten oxide in Table 2 being 0 mol% means that they were not mixed. The following are the same.

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Abstract

There is provided a production method of a lithium-containing composite oxide capable of improving performances of cycle characteristics, rate characteristics, and the like of a lithium ion secondary battery. A production method of a lithium-containing composite oxide is characterized in that when producing a lithium-containing composite oxide by mixing a transition metal hydroxide containing Ni and Mn essentially and a lithium source and heating the mixture, a transition metal hydroxide having a crystallite diameter of the (100) plane being 35 nm or less in a crystal structure model in the space group P-3m1 of an X-ray diffraction pattern is used.

Description

technical field [0001] This application claims priority to Japanese Patent Application No. 2014-167662 filed on August 20, 2014 and Japanese Patent Application No. 2015-132879 filed on July 1, 2015, and the entire contents of these applications are incorporated herein by reference . [0002] The present invention relates to a method for producing a lithium-containing composite oxide and the lithium-containing composite oxide. Background technique [0003] In lithium-ion secondary batteries, lithium-containing composite oxides (for example, LiMnO 2 ) as the positive electrode active material. The lithium-containing composite oxide is a composite oxide containing, in addition to Li, transition metal elements such as Ni, Co, and Mn, and other metal elements as doping elements. The crystal structure of the lithium-containing composite oxide is a layered structure having metal atomic layers, lithium atomic layers, and oxygen atomic layers. [0004] Lithium-ion secondary batte...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/36H01M4/505H01M4/525H01M10/0525
CPCH01M4/364H01M4/505H01M4/525H01M10/0525C01G53/006C01G53/50C01P2002/74C01P2004/61C01P2006/12C01P2006/40H01M4/485H01M2004/021H01M2004/028Y02E60/10
Inventor 田村昌彦河里健浅仓聪
Owner SUMITOMO CHEM CO LTD
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