Nickel-manganese composite hydroxide particles, method for producing same, positive electrode active material for nonaqueous electrolyte secondary batteries, method for producing positive electrode active material and nonaqueous electrolyte secondary dell

A technology of composite hydroxide and positive electrode active material, which is applied in the direction of non-aqueous electrolyte batteries, secondary batteries, nickel compounds, etc., can solve the problems of high particle size uniformity, battery capacity reduction, and selective degradation of fine particles, and achieve industrialization Effect of high value, high particle size uniformity, and excellent battery characteristics

Active Publication Date: 2013-08-14
SUMITOMO METAL MINING CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0022] 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.
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Method used

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  • Nickel-manganese composite hydroxide particles, method for producing same, positive electrode active material for nonaqueous electrolyte secondary batteries, method for producing positive electrode active material and nonaqueous electrolyte secondary dell
  • Nickel-manganese composite hydroxide particles, method for producing same, positive electrode active material for nonaqueous electrolyte secondary batteries, method for producing positive electrode active material and nonaqueous electrolyte secondary dell
  • Nickel-manganese composite hydroxide particles, method for producing same, positive electrode active material for nonaqueous electrolyte secondary batteries, method for producing positive electrode active material and nonaqueous electrolyte secondary dell

Examples

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Embodiment 1）

[0278] [Manufacture of composite hydroxide particles]

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

[0280] (nucleation process)

[0281] First, water was filled to half the capacity of the reaction tank (34 L), and the temperature in the tank was set to 40° C. while stirring. At this time, an atmospheric environment was formed in the reaction tank (the oxygen concentration was 21% by volume). By adding an appropriate amount of 25% by mass aqueous sodium hydroxide solution and 25% by mass ammonia water to water in the reaction tank, the pH of the reaction liquid in the reaction tank was adjusted to 13.0 based on a liquid temperature of 25°C. Furthermore, the ammonia concentration in this reaction liquid was adjusted ...

Embodiment 2）

[0320] Except mixing lithium hydroxide and composite oxide particles so that Li / Me=1.25, and setting the firing temperature to 850° C., the same procedure as in Example 1 was carried out to obtain a positive electrode active material for a non-aqueous electrolyte secondary battery. , and evaluated. The composition of the obtained positive electrode active material was 8.84% by mass of Li, 29.9% by mass of Ni, and 28.0% by mass of Mn, and it was confirmed that Li 1.25 Ni 0.50 m 0.50 o 2 .

Embodiment 3）

[0322] Except that in the particle growth process of the composite hydroxide particle production process, the switching from the atmospheric environment to the nitrogen gas environment is performed at a time point of 6.25% of the total time of the particle growth process, the operation is performed in the same manner as in Example 1, and a non- A positive electrode active material for an aqueous electrolyte secondary battery was developed and evaluated. In addition, the composition of the obtained composite hydroxide particle and the positive electrode active material is the same as that of Example 1, and the composite hydroxide particle is composed of a center part and an outer shell part similarly to Example 1, wherein the center part is made of needles. shaped fine primary particles (particle diameter about 0.3 μm), and the shell portion is composed of plate-shaped primary particles (particle diameter 0.7 μm) larger than the fine primary particles on the outside of the centr...

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Abstract

The subject of the invention provides nickel-manganese composite hydroxide particles having a small and uniform particle diameter and a hollow structure; and a method for producing the nickel-manganese composite hydroxide particles. When a nickel-manganese composite hydroxide is obtained by a crystallization reaction, an aqueous solution for nucleation, which contains a metal compound containing nickel, a metal compound containing manganese, and an ammonium ion donor, is controlled to have a pH value of 12.0-13.4 as measured at a reference liquid temperature of 25 DEG C and nucleation is carried out in an oxidizing atmosphere, and then an aqueous solution for particle growth, which contains the thus-formed nuclei, is controlled to have a pH value of 10.5-12.0 as measured at a reference liquid temperature of 25 DEG C and the nuclei are grown, while switching the atmosphere from the oxidizing atmosphere having an oxygen concentration of more than 1% by volume to a mixed atmosphere of an inert gas and oxygen with an oxygen concentration of 1% by volume or less.

Description

technical field [0001] The present invention relates to a nickel-manganese composite hydroxide particle and a production method thereof, a positive electrode active material for a non-aqueous electrolyte secondary battery using the nickel-manganese composite hydroxide particle as a raw material, a production method thereof, 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 [0002] In recent years, with the popularization of portable electronic devices such as mobile phones and notebook personal computers, the development of small and lightweight non-aqueous electrolyte secondary batteries with high energy density has been eagerly expected. In addition, the development of a high-output secondary battery as a power source for driving an engine, particularly as a battery for a power source for conveyance equipment, has been earnest...

Claims

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Application Information

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IPC IPC(8): C01G53/00
CPCC01P2004/34H01M4/505H01M4/523H01M4/0471C01G53/50H01M4/525C01G53/44H01M10/0525C01P2006/40C01G51/50C01P2004/03C30B7/14C01G51/44C01P2004/51C01G53/006C01P2004/61C01G45/1228Y02E60/122H01M4/52H01M4/502C01P2002/52H01M4/366C01P2004/62H01M4/0497Y02E60/10Y10T428/2982C01G45/00C01G53/00H01M10/052
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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