Multicomponent oxide containing cobalt nickel and preparation and application thereof

A multi-component and oxide technology, applied in the field of high-energy electrochemistry, can solve the problems of short storage time of slurry without freezing, uneven product composition and performance, difficulty in mixing uniform precursor materials, etc., and achieve good processing behavior , good fluidity and uniformity, and strong process operability

Inactive Publication Date: 2006-11-29
SHENZHEN BAK BATTERY CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

An outstanding advantage of this method is that it is easy to industrialize and the cost of the production process is not high. Its disadvantage is that it is difficult to mix the precursor materials evenly, resulting in uneven composition and performance of the product, especially when there are many reaction components.
The material is very easy to freeze during pulping, and the storage time of the slurry without freezing is short; the compaction density of the pole piece is low, and the pole piece made is relatively hard, especially brittle and easy to break, so that the volume specific energy of the material lower, poor processing behavior

Method used

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  • Multicomponent oxide containing cobalt nickel and preparation and application thereof
  • Multicomponent oxide containing cobalt nickel and preparation and application thereof
  • Multicomponent oxide containing cobalt nickel and preparation and application thereof

Examples

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preparation example Construction

[0027] The preparation method of the multi-component oxide containing cobalt and nickel is to prepare a mixed complex solution of nickel, cobalt, metal M and ammonia in the ammonia water-amine salt or ammonia water-weak acid buffer solution with a pH value of 8-11, and then Slowly add the lye into the reaction kettle at the same time for coprecipitation reaction, wherein the coprecipitation reaction time is 4-10 hours, the reaction temperature is 40-80°C, the stirring speed is 240-1000rpm, and Ni-Co-M composite hydroxide is generated The Ni-Co-M composite hydroxide particles are aged, separated and washed to obtain ellipsoidal Ni-Co-M composite hydroxide particles with uniform particle size, high density and excellent electrochemical performance; Dry the Ni-Co-M composite hydroxide particles in an air atmosphere or a vacuum environment at 60-120°C for 16-36 hours, then mix with lithium hydroxide or lithium salt, and heat treat the mixture at 240-550°C 3-7 hours; and then heat-...

Embodiment 1

[0029] Embodiment 1: positive electrode active material LiNi 0.75 co 0.1 al 0.1 mn 0.05 o 2 The preparation and performance structure test

[0030] Take a total of 8.5 moles of nickel (Ni) and cobalt (Co) sulfates at a molar ratio of 0.75:0.1, and slowly add them into a buffer solution with a pH value of 10 prepared by ammonia water and ammonium sulfate under constant stirring to obtain nickel-cobalt Mix 10L of ammonia complex solution with 10L, 2.2M NaOH and 0.1M Al 2 (SO4) 3At the same time, the mixed aqueous solution was slowly dropped into a reaction kettle filled with 7L aqueous solution whose pH value was adjusted to 11 with 2.2M pure NaOH solution, the reaction temperature was 40°C, and the stirring speed was 400rpm. After 6 hours, the Ni-Co-Al composite hydroxide was isolated. After aging for 2 hours, it was washed several times with distilled water and then dried at 80°C for 16 hours. After grinding and sieving, the precursor was obtained. Manganese carbonate a...

Embodiment 2

[0032] Embodiment 2: positive electrode active material LiNi 0.85 co 0.1 mn 0.02 Ti 0.02 Cu 0.01 o 2 The preparation and performance structure test

[0033] According to the molar ratio of 0.85:0.1:0.02:0.01, a total of 9.8 moles of nickel (Ni), cobalt (Co), manganese (Mn), and copper (Cu) sulfates are added slowly under constant stirring to prepare from ammonia water and ammonium sulfate. In the buffer solution with a pH value of 9, 10L of nickel-cobalt-manganese-copper-ammonia mixed complex solution was prepared. Under constant stirring, it was mixed with 10L of 2.2M NaOH aqueous solution and slowly dripped into 7L of aqueous solution with 2.2 M pure NaOH solution adjusted its pH value to 10 in the reactor, the reaction temperature was 50 ° C, and the stirring speed was 600 rpm. After 7 hours, the Ni-Co-Mn-Cu composite hydroxide was isolated, aged for 1 hour, washed several times with distilled water, dried at 100°C for 10 hours, ground and sieved to prepare the precur...

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Abstract

A method for preparing multicomponent oxide containing Ni and Co includes preparing mixed ammonia complex solution by materials of Ni and Co as well as the other metal M in buffer solution; adding prepared ammonia complex solution and aqueous alkali slowly into reactor simultaneously to generate Ni-Co-M composite hydroxide by coprecipitation then obtaining forerunner after aging, separating, washing and drying; mix-grinding forerunner and lithium hydroxide to obtain final product of Lia(NibCoc) M1-b-cO2 after heat treatment.

Description

【Technical field】 [0001] The invention relates to the field of high-energy electrochemistry, in particular to a cobalt-nickel-containing multi-component oxide, a preparation method thereof and an application thereof in a lithium-ion secondary battery. 【Background technique】 [0002] In the past ten years, lithium cobalt oxide has been the first choice for commercial lithium-ion battery cathode materials due to its excellent properties, such as high specific capacity, good cycle performance, and excellent processing behavior. However, cobalt is a rare metal with poor resources. In recent years, the supply exceeds demand. Continue to skyrocket. On the other hand, with the rapid development of mobile communication electronic equipment and electric vehicles in the IT industry, new requirements are put forward for lithium-ion batteries in terms of high cycle performance and high specific energy. Therefore, new energy and new material technology as the background The research on ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/48H01M4/58H01M4/04C01D15/00C01G1/02H01M10/40H01M4/50H01M4/52H01M10/0525
CPCY02E60/122H01M4/525H01M4/485Y02E60/10
Inventor 方送生
Owner SHENZHEN BAK BATTERY CO LTD
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