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Nickel compound hydroxide and method for producing same, positive pole active substance for nonaqueous electrolyte secondary cell and method for producing same, and nonaqueous electrolyte secondary cell

A composite hydroxide and cathode active material technology, which is applied in the direction of secondary batteries, nickel compounds, battery electrodes, etc., can solve the problem of battery capacity reduction, failure to consider the particle size and particle size distribution of lithium composite oxides, and the selective degradation of fine particles And other issues

Active Publication Date: 2014-11-05
SUMITOMO METAL MINING CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, it can be said that the particle size and particle size distribution in the lithium composite oxide have not been taken into consideration. Therefore, it is considered that it is difficult to avoid the selective deterioration of fine particles caused by the unevenness of the applied voltage in the electrode due to the unevenness of the particle size. The problem of reduced battery capacity

Method used

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  • Nickel compound hydroxide and method for producing same, positive pole active substance for nonaqueous electrolyte secondary cell and method for producing same, and nonaqueous electrolyte secondary cell
  • Nickel compound hydroxide and method for producing same, positive pole active substance for nonaqueous electrolyte secondary cell and method for producing same, and nonaqueous electrolyte secondary cell
  • Nickel compound hydroxide and method for producing same, positive pole active substance for nonaqueous electrolyte secondary cell and method for producing same, and nonaqueous electrolyte secondary cell

Examples

Experimental program
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Effect test

no. 1 approach

[0112] a) Nucleation process

[0113] Such as figure 1 As shown, first, the general formula (2) related to the metal composition ratio and the composite hydroxide becomes the general formula (a): Ni x co y al z mn t m s (x+y+z+t+s=1, 0≤y≤0.8, 0≤z≤0.1, 0.1≤t≤0.8, 0≤s≤0.05, M is selected from Mg, Ca, Ti, V , Cr, Zr, Nb, Mo, and W composition ratio of at least one additional element in the group consisting of), a plurality of metal compounds are dissolved in water at a predetermined ratio to prepare a mixed aqueous solution.

[0114] In particular, the manganese content in the mixed aqueous solution needs to be controlled so that t in the general formula (a) is in the range of 0.1 to 0.8, preferably 0.2 to 0.7, more preferably 0.3 to 0.8. 0.6 below the way to control. If t is less than 0.1, fine primary particles cannot be obtained; if it exceeds 0.8, shrinkage during firing decreases and a sufficient hollow structure cannot be obtained.

[0115] In addition, in order to ...

no. 2 approach

[0138] Such as figure 2 In another embodiment shown, in addition to the aqueous solution for nucleation, a component-adjusted aqueous solution adjusted to a pH value and an ammonium ion concentration suitable for the particle growth process may be formed in advance, and another reaction tank may be added to the component-adjusted aqueous solution. The aqueous solution containing nuclei (aqueous solution for nucleation, preferably an aqueous solution after removing a part of the liquid component from the aqueous solution for nucleation) generated by carrying out the nucleation step in the process can be used as the reaction aqueous solution, and the reaction aqueous solution can also be used as the particle growth solution. aqueous solution to perform the particle growth process.

[0139] In this case, since the separation of the nucleation step and the particle growth step can be performed more reliably, the state of the reaction aqueous solution in each step can be made into...

Embodiment 1

[0270] [Manufacture of composite hydroxide]

[0271] Composite hydroxides were prepared as described below. In addition, when making the composite hydroxide, the positive electrode active material and the secondary battery in all examples, all used various special grade products (special grade chemicals manufactured by Wako Pure Chemical Industry Co., Ltd.) unless otherwise specified. ) reagents.

[0272] (nucleation process)

[0273] First, water was added 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, the inside of the reaction tank was an atmospheric environment (oxygen concentration: 21% by volume). By adding an appropriate amount of 25% by mass aqueous sodium hydroxide solution and 25% by mass ammonia water to the water in the reaction tank, the pH of the reaction solution in the reaction tank was adjusted to be 13.0 based on a liquid temperature of 25°C. Furthermore, the ammonia concen...

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Abstract

Provided is a lithium composite oxide having a uniform and suitable particle size and high specific surface area due to a hollow structure that can be produced on an industrial scale. A nickel composite hydroxide as a raw material thereof is obtained controlling the particle size distribution of the nickel composite hydroxide, the nickel composite hydroxide having a structure comprising a center section that comprises minute primary particles, and an outer-shell section that exists on the outside of the center section and comprises plate shaped primary particles that are larger than the primary particles of the center section, by a nucleation process and a particle growth process that are separated by controlling the pH during crystallization, and by controlling the reaction atmosphere in each process and the manganese content in a metal compound that is supplied in each process.

Description

technical field [0001] The present invention relates to a nickel composite hydroxide and a manufacturing method thereof, a positive electrode active material for a non-aqueous electrolyte secondary battery using the composite hydroxide as a raw material and a manufacturing method thereof, and the positive electrode active material for a non-aqueous electrolyte secondary battery Substances are used as positive electrode materials for non-aqueous electrolyte secondary batteries. Background technique [0002] In recent years, along with the popularization of portable electronic devices such as mobile phones and notebook personal computers, the development of small and lightweight secondary batteries with high energy density has been eagerly expected. In addition, as batteries for electric vehicles typified by hybrid vehicles, development of high-output secondary batteries is highly expected. As a non-aqueous electrolyte secondary battery satisfying the above requirements, ther...

Claims

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Application Information

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IPC IPC(8): C01G53/00H01M4/505H01M4/525
CPCH01M4/505C01P2004/84H01M4/525C01P2006/12C01G53/006C01P2004/51C01G53/50C01P2004/45C01P2004/32C01G53/42Y02E60/122C01P2004/61Y02E60/10C01G53/44H01M4/0471H01M4/0497H01M4/1391H01M4/364H01M10/0525Y02P70/50
Inventor 福井笃户屋广将
Owner SUMITOMO METAL MINING CO LTD
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