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Nickel-manganese composite hydroxide particle and manufacturing method thereof, positive electrode active material and manufacturing method thereof and non-water-system electrolyte secondary battery

A technology of composite hydroxide and positive active material, applied in the direction of active material electrode, secondary battery, positive electrode, etc., can solve the problems of high particle size uniformity, reduced battery capacity, selective deterioration of fine particles, etc., and achieves industrial value The effect of high, high particle size uniformity, and excellent battery characteristics

Inactive Publication Date: 2015-09-30
SUMITOMO METAL MINING CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0023] However, the positive electrode active material disclosed in Patent Document 4 is a hollow particle. Therefore, although an increase in the specific surface area can be expected compared with a solid particle, the particle diameter is not described.
Therefore, although the improvement of the reactivity with the electrolyte solution due to the increase in the specific surface area can be expected, the effect of the micronization on the movement distance of the above-mentioned lithium ions is not clear, and sufficient improvement in output characteristics cannot be expected.
Furthermore, since the particle size distribution is considered to be equivalent to that of conventional positive electrode active materials, there is a high possibility that the particle selectivity will deteriorate due to the unevenness of the applied voltage in the electrode, and the battery capacity will decrease.
[0024] In summary, the current situation is that lithium composite oxides that can sufficiently improve the performance of lithium-ion secondary batteries and composite hydroxides that can be used as raw materials for the composite oxides have not yet been developed.
In addition, although various researches have been conducted on methods for producing composite hydroxides, no composite hydroxide that can be used as a raw material for composite oxides that can sufficiently improve the performance of lithium-ion secondary batteries on an industrial scale has been developed so far. method of manufacture
That is, a positive electrode active material with a small particle size and high particle size uniformity and a large reaction area, such as a hollow structure, has not yet been developed, and it is necessary to develop such a positive electrode active material and its industrial production method.

Method used

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  • Nickel-manganese composite hydroxide particle and manufacturing method thereof, positive electrode active material and manufacturing method thereof and non-water-system electrolyte secondary battery
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  • Nickel-manganese composite hydroxide particle and manufacturing method thereof, positive electrode active material and manufacturing method thereof and non-water-system electrolyte secondary battery

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0278] [Production of composite hydroxide particles]

[0279] Composite hydroxide particles were prepared as follows. In addition, various special grade chemicals manufactured by Wako Pure Chemical Industries, Ltd. were used in preparing the composite hydroxide particles, the positive electrode active material, and the secondary battery in all the examples.

[0280] (nucleation step)

[0281] First, water was added to the reaction tank (34 L) to half the volume, and the temperature in the tank was set to 40°C while stirring. At this time, an atmospheric environment (oxygen concentration: 21% by volume) was formed in the reaction tank. The pH of the reaction liquid in the reaction tank was adjusted to be 13.0 based on the liquid temperature of 25°C by adding appropriate amounts of 25 mass % aqueous sodium hydroxide and 25 mass % ammonia water to the water in the reaction tank. Furthermore, the ammonia concentration in this reaction liquid was adjusted to 15 g / L, and the pre-...

Embodiment 2

[0320] A positive electrode active material for a non-aqueous electrolyte secondary battery was obtained in the same manner as in Example 1, except that lithium hydroxide and composite oxide particles were mixed so that Li / Me=1.25, and the firing temperature was set to 850°C. , and evaluated. The obtained positive electrode active material had a composition of 8.84 mass % of Li, 29.9 mass % of Ni, and 28.0 mass % of Mn, and was confirmed to be Li 1.25 Ni 0.50 M 0.50 O 2 .

Embodiment 3

[0322] In the particle growth process of the composite hydroxide particle production process, except that switching from the atmospheric environment to the nitrogen environment was performed at a time point of 6.25% of the total time of the particle growth process, it was carried out in the same manner as in Example 1 to obtain non-ferrous metals. Positive electrode active materials for aqueous electrolyte secondary batteries were evaluated. In addition, the compositions of the obtained composite hydroxide particles and the positive electrode active material were the same as in Example 1, and the composite hydroxide particles were composed of a center portion and an outer shell portion as in Example 1, wherein the center portion was made of needles. The outer shell portion is composed of plate-shaped primary particles (particle size: 0.7 μm) larger than the fine primary particles on the outer side of the central portion.

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Abstract

The invention provides a nickel-manganese composite hydroxide particle and a manufacturing method thereof. The nickel-manganese composite hydroxide particle has the small and uniform particle size and is of a hollow structure. According to the solution, when nickel-manganese composite hydroxide is obtained through a devitrification reaction, a nickelic metallic compound, a manganeses metallic compound and a water solution for nucleus formation of an ammonium ion donator are controlled so that the pH value of the water solution can be controlled to range from 12.0 to 13.4 with the solution temperature being 25 DEG C as the reference, nucleus formation is performed in the oxidability environment, then, a water solution for growth of the particle with the formed nucleus so that the pH value of the water solution can be controlled to range from 10.5 to 12.0 with the solution temperature being 25 DEG C as the reference, and the oxidability environment with the oxygen concentration being larger than 1% is switched into the oxygen and non-active gas mixture environment with the oxygen concentration being smaller than 1% so that the nucleus can grow.

Description

[0001] The application date is March 28, 2011, the application number is 201180058151.7, and the name of the invention is "nickel-manganese composite hydroxide particles and their production methods, positive electrode active materials for non-aqueous electrolyte secondary batteries and their production methods, and Divisional application of the application for "Non-aqueous Electrolyte Secondary Batteries". technical field [0002] The present invention relates to a nickel-manganese composite hydroxide particle and a method for producing the same, a positive electrode active material for a non-aqueous electrolyte secondary battery using the nickel-manganese composite hydroxide particle as a raw material, a method for producing the same, and the non-aqueous electrolyte A non-aqueous electrolyte secondary battery using a positive electrode active material for a secondary battery as a positive electrode material. Background technique [0003] In recent years, with the spread of...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/505H01M4/525H01M4/1391H01M10/0525
CPCH01M4/1391H01M4/505H01M4/525H01M10/0525H01M2004/028Y02E60/10
Inventor 户屋广将森建作今泉心池内研二大迫敏行
Owner SUMITOMO METAL MINING CO LTD
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