Preparation method of high-nickel ternary lithium ion battery positive electrode material and product thereof

A technology for lithium-ion batteries and positive electrode materials, which is applied in the field of preparation of high-nickel ternary lithium-ion battery positive electrode materials, can solve the problems of the first discharge specific capacity and the first charge and discharge efficiency decline, and achieve the improvement of comprehensive electrochemical performance and good battery life. Effect of chemical properties and narrow particle size distribution

Pending Publication Date: 2022-06-07
INST OF RESOURCES UTILIZATION & RARE EARTH DEV GUANGDONG ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, titanium-doped positive electrode materials for high-nickel ternary lithium-ion batteries have the problem of lower first-time discharge specific capacity and first-time charge-discharge efficiency, and the cycle stability and rate performance of the material still need to be further improved.

Method used

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  • Preparation method of high-nickel ternary lithium ion battery positive electrode material and product thereof
  • Preparation method of high-nickel ternary lithium ion battery positive electrode material and product thereof
  • Preparation method of high-nickel ternary lithium ion battery positive electrode material and product thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0068] S11, 4.20g of isopropanol aluminum (purity 99.99%), 1.61g of isopropoxyzirconium isopropanol complex dissolved in 50ml of absolute ethanol, room temperature magnetic stirrer at 1300 rpm stirring for 1.5h, to obtain a composite salt solution;

[0069] S12, the compound salt solution was added to 36.19gNi 0.93 Co 0.07 (OH) 2 In the powder, after magnetic stirring for 0.5h, the slurry A is obtained;

[0070] S13, preparation of ethanol aqueous solution: deionized water and absolute ethanol according to the volume ratio of 1:2 mixed uniformly, to obtain an aqueous ethanol solution;

[0071] S14, in step S12 obtained slurry A added 60mL of ethanol aqueous solution, after magnetic stirring 0.5h, heating to 60 °C, stirring at 1000rpm speed for 1.5h, room temperature aging 24h, filtering, drying at 80 °C in the drying box for 24h, to obtain a ternary precursor.

[0072] S15: Take 18.98g ternary precursor and 9.23g LiOH· H 2 O is evenly mixed, where Li: (Ni + Co + Al) = 1.05:1 (mola...

Embodiment 2

[0074] S11, 4.17g of isopropanol aluminum (purity 99.99%), 2.41g of isopropoxyzirconium isopropanol complex dissolved in 50ml of absolute ethanol, room temperature magnetic stirrer at 1300rpm stirring for 1.5h, to obtain a composite salt solution;

[0075] S12, the composite salt solution was added to 35.94gNi 0.93 Co 0.07 (OH) 2In the powder, after magnetic stirring for 0.5h, the slurry A is obtained;

[0076] S13, preparation of ethanol aqueous solution: deionized water and absolute ethanol according to the volume ratio of 1:2 mixed uniformly, to obtain an aqueous ethanol solution;

[0077] S14, in step S12 obtained slurry A added 60mL of ethanol aqueous solution, after magnetic stirring 0.5h, heating to 60 °C, stirring at 1000rpm speed for 1.5h, room temperature aging 24h, filtering, drying at 80 °C in the drying box for 24h, to obtain a ternary precursor.

[0078] S15: Take 18.98g ternary precursor and 9.22g LiOH· H 2 O is evenly mixed, where Li: (Ni + Co + Al) = 1.05:1 (molar...

Embodiment 3

[0080] S11, 4.14g of isopropanol aluminum (purity 99.99%), 3.21g of isopropoxyzirconium isopropanol complex dissolved in 50ml of absolute ethanol, room temperature magnetic stirrer at 1300 rpm stirring for 1.5h, to obtain a composite salt solution;

[0081] S12, the composite salt solution was added to 35.69gNi 0.93 Co 0.07 (OH) 2 In the powder, after magnetic stirring for 0.5h, the slurry A is obtained;

[0082] S13, preparation of ethanol aqueous solution: deionized water and absolute ethanol according to the volume ratio of 1:2 mixed uniformly, to obtain an aqueous ethanol solution;

[0083] S14, in step S12 obtained slurry A added 60mL of ethanol aqueous solution, after magnetic stirring 0.5h, heating to 60 °C, stirring at 1000rpm speed for 1.5h, room temperature aging 24h, filtering, drying at 80 °C in the drying box for 24h, to obtain a ternary precursor.

[0084] S15: Take 18.98g ternary precursor and 9.20g LiOH· H2 O is evenly mixed, where Li: (Ni + Co + Al) = 1.05:1 (mola...

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Abstract

The invention discloses a preparation method of a high-nickel ternary lithium ion battery positive electrode material and a product thereof, aluminum isopropoxide, an isopropoxy zirconium isopropanol compound or tin isopropoxide is used as a raw material, and the surface of Ni0. 93Co0. 07 (OH) 2 is coated with a layer of hydrolysis product through hydrolysis to obtain a ternary precursor; and uniformly mixing the ternary precursor with a lithium salt, sintering in an oxygen atmosphere to obtain Li [(Ni < 0.93 > Co < 0.07 >) < 0.95 > Al < 0.05 >] < x > Zr < y > O < 2 > or Li [(Ni < 0.93 > Co < 0.07 >) < 0.95 > Al < 0.05 >] < x > Sn < y > O < 2 >, x and y are both greater than 0, and the sum of x and y is equal to 1. According to the preparation method provided by the invention, the crystal structure of the material is stabilized by virtue of doping elements in the shell and the bulk phase, and the dissolution of transition metal ions in the active material in a long-term circulation process is avoided, so that the comprehensive electrochemical performance of the material is improved.

Description

Technical field [0001] The present invention relates to the field of lithium-ion battery technology, specifically to a high nickel ternary lithium-ion battery cathode material preparation method and product thereof. Background [0002] At present, lithium-ion batteries are widely used in the field of electric vehicles and energy storage, and the demand for its cathode materials lithium cobalt oxide, nickel cobalt manganese oxide and lithium nickel cobalt aluminum oxide ternary cathode materials in the large-scale use of batteries is also increasing. However, due to the bottleneck constraints of the scarcity of cobalt resources, "high nickel and low cobalt" has gradually become the main concern and important development direction of the lithium-ion battery industry. [0003] Among the many materials, ternary high nickel cathode materials with a Ni molar content of more than 60% have won wide attention and research and development by researchers by virtue of their high capacity and...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G53/00H01M4/485H01M4/525H01M10/0525
CPCC01G53/006H01M4/525H01M4/485H01M10/0525C01P2004/03C01P2006/40H01M2004/028Y02E60/10
Inventor 王英毛贵洪曾黎明唐仁衡肖方明
Owner INST OF RESOURCES UTILIZATION & RARE EARTH DEV GUANGDONG ACAD OF SCI
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