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A mixed material of lithium cobalt oxide and three elements and a preparing method thereof

A mixed material, three-element technology, applied in electrical components, electrochemical generators, battery electrodes, etc., can solve the problems of high raw material cost, limited material performance improvement, low compaction density and energy density, etc., and meet the requirements of preparation equipment low effect

Inactive Publication Date: 2017-12-15
QINGHAI TAIFENG XIANXING LITHIUM ENERGY TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Lithium cobalt oxide has high compaction density and energy density, but poor safety performance and high raw material cost
Three-element has better safety performance and lower raw material cost, but low compaction density and energy density
However, this method has limited improvement in material properties.

Method used

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  • A mixed material of lithium cobalt oxide and three elements and a preparing method thereof
  • A mixed material of lithium cobalt oxide and three elements and a preparing method thereof
  • A mixed material of lithium cobalt oxide and three elements and a preparing method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0047] Design Li 1.08 co 0.90 al 0.10 o 2 Average D50 for large particles = 19.4 μm. Li is calculated according to the Horsfield model 1.02 Ni 0.33 co 0.33 mn 0.33 W 0.01 o 2 The average D50 range of small particles is 0-8.0μm, the design Li 1.02 Ni 0.33 co 0.33 mn 0.33 W 0.01 o 2 Average D50 for small particles = 8.0 μm.

[0048] According to the chemical formula Li 108 co 090 al 010 o 2 The molar ratio of cobalt oxyhydroxide and nano aluminum oxide is weighed and placed in a ball mill jar, the mass ratio of the ball to material is 2:1, ball milled for 3 hours, and mixed uniformly.

[0049] According to the chemical formula Li 1.02 Ni 0.33 co 0.33 mn 0.33 W 0.01 o 2 Weigh the three-element hydroxide and ammonium metatungstate and place them in a ball mill tank with a mass ratio of ball to material of 2:1, ball mill for 3 hours, and mix well.

[0050] According to the chemical formula 0.50Li 1.08 co 0.90 al 0.10 o 2 0.50 Li 1.02 Ni 0.33 co 0.33...

Embodiment 2

[0052] Design Li 1.08 co 0.90 al 0.10 o 2 Average D50 for large particles = 19.4 μm. Li is calculated according to the Horsfield model 1.02 Ni 0.33 co 0.33 mn 0.33 W 0.01 o 2 The average D50 range of small particles is 0-8.0μm, the design Li 1.02 Ni 0.33 co 0.33 mn 0.33 W 0.01 o 2 Average D50 for small particles = 8.0 μm.

[0053] According to the chemical formula Li 1.08 co 0.90 al 0.10 o 2 The molar ratio of cobalt oxyhydroxide and nano aluminum oxide is weighed and placed in a ball mill jar, the mass ratio of the ball to material is 2:1, ball milled for 3 hours, and mixed uniformly.

[0054] According to the chemical formula Li 1.02 Ni 0.33 co 0.33 mn 0.33 W 0.01 o 2 Weigh the three-element hydroxide and ammonium metatungstate and place them in a ball mill tank with a mass ratio of ball to material of 2:1, ball mill for 3 hours, and mix well.

[0055] According to the chemical formula 0.60Li 1.08 co 0.90 al 0.10 o 2 0.40 Li 1.02 Ni 0.33 co 0...

Embodiment 3

[0057] Design Li 1.08 co 0.90 al 0.10 o 2 Average D50 for large particles = 19.4 μm. Li is calculated according to the Horsfield model 1.02 Ni 0.33 co 0.33 mn 0.33 W 0.01 o 2 The average D50 range of small particles is 0-8.0μm, the design Li 1.02 Ni 0.33 co 0.33 mn 0.33 W 0.01 o 2 Average D50 for small particles = 8.0 μm.

[0058] According to the chemical formula Li 1.08 co 0.90 al 0.10 o 2 The molar ratio of cobalt oxyhydroxide and nano aluminum oxide is weighed and placed in a ball mill jar, the mass ratio of the ball to material is 2:1, ball milled for 3 hours, and mixed uniformly.

[0059] According to the chemical formula Li 1.02 Ni 0.33 co 0.33 mn 0.33 W 0.01 o 2 Weigh the three-element hydroxide and ammonium metatungstate and place them in a ball mill tank with a mass ratio of ball to material of 2:1, ball mill for 3 hours, and mix well.

[0060] According to the chemical formula 0.70Li 1.08 co 0.90 al 0.10 o 2 0.30 Li 1.02 Ni 0.33 co 0...

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Abstract

A mixed material of lithium cobalt oxide and three elements and a preparing method thereof are disclosed. Solid-phase mixing and sintering synthesis are adopted to prepare the mixed material from the lithium cobalt oxide having a specific granularity and three elements having a specific granularity according to a proper ratio. The method has low requirements on preparing equipment, but the prepared mixed material has a high compaction density (4.40 g / cm<3> or above), and has better safety performance at 4.5 V or even a higher voltage.

Description

technical field [0001] The invention belongs to the field of lithium ion battery electrode materials, and relates to a lithium cobalt oxide and three-element mixed material and a preparation method thereof. Background technique [0002] Lithium cobaltate and three elements are currently the most well-studied and widely used cathode materials for consumer lithium-ion batteries. In recent years, the operating voltage of consumer lithium-ion batteries has become higher and higher, and the requirements for volumetric energy density and safety performance of positive electrode materials have also become higher and higher. Lithium cobalt oxide has high compaction density and energy density, but poor safety performance and high raw material cost. Three-element has better safety performance and lower raw material cost, but low compaction density and energy density. Lithium cobalt oxide or three elements alone cannot fully meet the various needs of the market. [0003] By controll...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/505H01M4/525H01M10/0525H01M4/36
CPCH01M4/362H01M4/505H01M4/525H01M10/0525Y02E60/10
Inventor 李淼李钊华武斌王欢欢周恒辉杨新河
Owner QINGHAI TAIFENG XIANXING LITHIUM ENERGY TECH CO LTD
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