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 for nonaqueous electrolyte secondary batteries, and nonaqueous electrolyte secondary battery

A technology of composite hydroxide and positive active material, applied in the direction of active material electrodes, secondary batteries, nickel compounds, etc., can solve problems such as unrealistic, and achieve improved filling, good battery capacity and cycle characteristics, and improved circularity. degree of effect

Active Publication Date: 2016-09-07
SUMITOMO METAL MINING CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in the case of manufacturing on an industrial scale as a precursor, it is unrealistic to measure the positive electrode active material or nickel-manganese composite hydroxide in three dimensions, calculate and evaluate the sphericity

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 for nonaqueous electrolyte secondary batteries, and nonaqueous electrolyte secondary battery
  • 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 for nonaqueous electrolyte secondary batteries, and nonaqueous electrolyte secondary battery
  • 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 for nonaqueous electrolyte secondary batteries, and nonaqueous electrolyte secondary battery

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0165] a) Fabrication of Composite Hydroxide Particles

[0166] First, nickel sulfate hexahydrate and manganese sulfate heptahydrate were dissolved in water so that the molar ratio of nickel and manganese was Ni:Mn=63:37, and the total concentration of nickel and manganese was prepared as a raw material aqueous solution of 2 mol / L. On the other hand, water was added to the upper limit of the reaction tank with a capacity of 60 L to the overflow, and the temperature in the tank was heated to 40° C. using a water bath. Simultaneously, nitrogen gas was introduced into the reaction tank at a rate of 20 L / min, and the inside of the reaction tank was adjusted to an inert environment (oxygen concentration: 0.2% by volume).

[0167] Then, while stirring the water in the reaction tank, the raw material aqueous solution, 25% by mass ammonia water, and 25% by mass aqueous solution of sodium hydroxide were continuously supplied to form a reaction aqueous solution. At this time, while con...

Embodiment 2～5

[0187] Except by adjusting the ammonium ion concentration and the pH value in the reaction tank, thereby the nickel ion concentration is controlled to the value shown in Table 2, carry out in the same way as in Example 1 to obtain composite hydroxide particles and positive electrode active materials. Make an evaluation. The results are shown in Table 3 and Table 4.

Embodiment 6

[0189] Except introducing nitrogen gas into the reaction tank at a rate of 3.0 L / min, and adjusting the oxygen concentration to 3.0% by volume, the composite hydroxide particles and positive electrode active material were obtained and evaluated in the same manner as in Example 2. The results are shown in Table 3 and Table 4.

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Abstract

A staring material aqueous solution containing at least Ni and Mn, an aqueous solution containing an ammonium ion donor and an alkali solution are supplied into a reaction vessel, and are mixed so as to obtain an aqueous reaction solution and to have nickel-manganese composite hydroxide particles crystallized. In this connection, the oxygen concentration in the reaction vessel is controlled to be 3.0% by volume or less, the temperature of the aqueous reaction solution is controlled to be 35-60 DEG C, and the nickel ion concentration is controlled to be 1,000 mg/L or more. Consequently, there are obtained nickel-manganese composite hydroxide particles which are represented by general formula NixMnyMt(OH)2+alpha (wherein 0.05 </= x </= 0.95, 0.05 </= y </= 0.95, 0 </= t </= 0.20, x + y + t = 1, 0 </= alpha </= 0.5 and M represents one or more elements selected from among Co, Ti, V, Cr, Zr, Nb, Mo, Hf, Ta and W), and which are composed of secondary particles, each of said secondary particles being composed of a plurality of primary particles aggregated together. The average circularity of the secondary particles having particle diameters that are 70% or more of the average particle diameter is 0.82 or more, and the tap density of the nickel-manganese composite hydroxide particles is 2.20 g/cm3 or more.

Description

technical field [0001] The present invention relates to nickel-manganese composite hydroxide particles 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 particles as a precursor, and a method for producing the same, and the non-aqueous electrolyte secondary battery. A non-aqueous electrolyte secondary battery in which a positive electrode active material for a secondary battery is used as a positive electrode material. Background technique [0002] With the popularization of power supplies for driving motors such as portable electronic devices and electric vehicles, lithium-ion secondary batteries, a type of non-aqueous electrolyte secondary batteries, are being developed as secondary batteries that can achieve high energy density and high output battery characteristics. Research and development of batteries. Among positive electrode active materials used a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G53/00H01M4/505H01M4/525
CPCC01G53/00C01G53/006C01G53/50C01P2004/03C01P2004/32C01P2004/45C01P2004/51C01P2004/61C01P2006/11H01M4/505H01M4/525H01M10/0525Y02E60/10C01G53/40C01P2006/40H01M4/043H01M4/0471H01M2004/028
Inventor 山地浩司本间刚秀牛尾亮三
Owner SUMITOMO METAL MINING CO LTD
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