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Transition metal-containing composite hydroxide and production method, non-aqueous electrolyte secondary battery, positive electrode active material and production method thereof

A composite hydroxide and cathode active material technology, applied in the direction of non-aqueous electrolyte batteries, secondary batteries, active material electrodes, etc., to achieve the effect of low cost, great industrial significance, and excellent battery characteristics

Active Publication Date: 2021-04-30
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 production method described in the above-mentioned document, since it takes time to switch the reaction environment in the particle growth step, it is necessary to temporarily stop the supply of the raw material aqueous solution and the like during the period, and there is still room for improvement in terms of productivity.

Method used

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  • Transition metal-containing composite hydroxide and production method, non-aqueous electrolyte secondary battery, positive electrode active material and production method thereof
  • Transition metal-containing composite hydroxide and production method, non-aqueous electrolyte secondary battery, positive electrode active material and production method thereof
  • Transition metal-containing composite hydroxide and production method, non-aqueous electrolyte secondary battery, positive electrode active material and production method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0292] a) Manufacture of composite hydroxide

[0293] [nucleation process]

[0294] First, in a 60L reaction tank, 14L of water was added and stirred, and the temperature in the tank was set to 40°C. At this time, nitrogen gas was circulated in the reaction tank for 30 minutes, and the reaction atmosphere was made into a non-oxidizing atmosphere with an oxygen concentration of 2% by volume or less. Next, an appropriate amount of 25% by mass of sodium hydroxide aqueous solution and 25% by mass of ammonia water was supplied to the reaction tank, the pH value was adjusted to 12.8 based on the liquid temperature of 25° C. and the ammonium ion concentration was adjusted to 10 g / L, thereby , forming an aqueous solution before the reaction.

[0295] At the same time, nickel sulfate, cobalt sulfate, manganese sulfate, and zirconium sulfate were dissolved in water, and the molar ratio of each metal element was Ni:Mn:Co:Zr=33.1:33.1:33.1:0.2, and a 2mol / L raw material aqueous solution...

Embodiment 2

[0333] In the particle growth process, after 60 minutes (relative to 25% of the total time of the particle growth process) from the start of the particle growth process, switching operation 1 was performed, and after 5 minutes (relative to 25% of the total time of the particle growth process) after switching operation 1 2.1%), then switch operation 2, and then continue the crystallization reaction for 175 minutes (72.9% relative to the total time of the particle growth process), except that, in the same manner as in Example 1, a composite hydrogen oxidation solution was obtained. materials, positive electrode active materials and secondary batteries, and evaluated. The results are shown in Tables 2 to 4.

Embodiment 3

[0335] In the particle growth process, after 60 minutes (relative to 25% of the total time of the particle growth process) from the start of the particle growth process, switching operation 1 is performed, and after 15 minutes (relative to 25% of the total time of the particle growth process) from switching operation 1 6.3%), then switch operation 2, and then continue the crystallization reaction for 165 minutes (relative to 68.8% of the total time of the particle growth process), except that, in the same manner as in Example 1, a composite hydroxide was obtained. , positive electrode active material and secondary battery, and evaluate them. The results are shown in Tables 2 to 4.

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Abstract

The present invention provides a positive electrode active material capable of simultaneously improving battery capacity, output characteristics, and cycle characteristics of a secondary battery. After adjusting the pH value of the reaction aqueous solution to a range of 12.0 to 14.0 to generate nuclei (nucleation), the pH value of the reaction aqueous solution was adjusted to a range of 10.5 to 12.0 to grow nuclei (particle growth), thereby obtaining In the process of the transition metal-containing composite hydroxide of the precursor of the positive electrode active material, the reaction environment is adjusted to a non-oxidizing environment at the initial stage of nucleation and particle growth, and the following environment is carried out at least once during the particle growth process Control: while continuously supplying the raw material aqueous solution, directly introduce oxidizing gas into the reaction aqueous solution to switch to an oxidizing environment with an oxygen concentration exceeding 5% by volume; The reactive gas is thus switched to a non-oxidizing environment.

Description

technical field [0001] The present invention relates to a composite hydroxide containing a transition metal and a manufacturing method thereof, a positive electrode active material for a nonaqueous electrolyte secondary battery using the composite hydroxide containing a transition metal as a precursor and a manufacturing method thereof, and the nonaqueous Electrolyte Secondary Battery A non-aqueous electrolyte secondary battery in which a positive electrode active material is used as a positive electrode material. Background technique [0002] In recent years, with the popularization of portable electronic devices such as mobile phones and notebook computers, the development of small and lightweight secondary batteries with high energy density has been strongly desired. In addition, development of a high-output secondary battery as a power source for electric vehicles such as hybrid electric vehicles, plug-in hybrid electric vehicles, and battery electric vehicles is strongl...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M4/525C01G53/00H01M4/505
CPCH01M4/505H01M4/525C01G53/006C01G53/66H01M10/052C01P2004/20C01G53/50C01P2004/03C01P2004/50C01P2004/51C01P2004/61C01P2004/84C01P2006/12C01P2006/40H01M4/364H01M4/366H01M2004/021H01M2004/028Y02E60/10C01G53/44C01P2002/52H01M10/0525
Inventor 东间崇洋相田平小向哲史镰田康孝
Owner SUMITOMO METAL MINING CO LTD