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High-compactness monocrystalline ternary cathode material, as well as preparation method and application thereof

A cathode material and high-pressure compaction technology, which is applied in the field of high-pressure compaction single crystal ternary cathode material and its preparation, can solve the problems of high energy consumption, complex synthesis process, labor-hour consumption, etc., and achieves energy consumption reduction, process simplification, The effect of a wide range of craftsmanship

Active Publication Date: 2019-03-26
CNGR ADVANCED MATERIAL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Its synthesis process is complicated, involving multiple mixing and multiple sintering, which is not only labor-intensive but also energy-intensive

Method used

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  • High-compactness monocrystalline ternary cathode material, as well as preparation method and application thereof
  • High-compactness monocrystalline ternary cathode material, as well as preparation method and application thereof
  • High-compactness monocrystalline ternary cathode material, as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0051] The first step: take the small particle ternary precursor Ni with the particle size satisfying D50=3.1μm 0.7 Co 0.1 Mn 0.2 (OH) 2 In an atmosphere furnace, the temperature was first heated to 400 °C for 6 h under the air atmosphere, and then continued to be heated to 900 °C for 12 h at a constant temperature of 3 °C / min; Oxide, its particle size D50=2.3μm;

[0052] The second step: take the large particle ternary precursor Ni with the particle size satisfying D50=13.4μm 0.7 Co 0.1 Mn 0.2 (OH) 2 In an atmosphere furnace, the temperature was first heated to 400 °C for 6 hours under an air atmosphere, and then continued to be heated to 940 °C for 16 hours at a constant temperature of 3 °C / min; Oxide, its particle size D50=5.2μm;

[0053] The third step: according to the mass ratio of large: small = 7:3, take the large and small single crystal ternary oxides with different particle sizes obtained from S2 and S1 and mix them evenly, and then mix them with Li with a m...

Embodiment 2

[0056] The difference from Example 1 is to mix large and small single crystal ternary oxides with a mass ratio of 5:5. Other experimental conditions are the same as those of Example 1. LiNi is obtained after sintering and cooling. 0.7 Co 0.1 Mn 0.2 O 2 High-pressure compacted single crystal ternary cathode material.

Embodiment 3

[0058] The difference from Example 1 is to mix large and small single crystal ternary oxides with a mass ratio of 3:7. Other experimental conditions are the same as in Example 1. LiNi is obtained after sintering and cooling. 0.7 Co 0.1 Mn 0.2 O 2 High-pressure compacted single crystal ternary cathode material.

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Abstract

The invention provides a high-compactness monocrystalline ternary cathode material, as well as a preparation method and application thereof. The preparation method comprises the following steps: sintering small-particle ternary precursor NixcOYmN(1-x-y)(OH)2 having the granularity D50 being more than or equal to 1.5 mu m and less than or equal to 5.5mu m, and breaking to obtain small-particle monocrystalline ternary oxide; sintering big-particle ternary precursor having the granularity D50 being more than or equal to 11mu m and less than or equal to 15mu m, and breaking to obtain large-particle monocrystalline ternary oxide; mixing the small-particle monocrystalline ternary oxide, big-particle monocrystalline ternary oxide and lithium salt in a preset proportion, sintering and cooling to obtain the high-compactness monocrystalline ternary cathode material, wherein the chemical composition of the big-particle monocrystalline ternary oxide is that same as that of the small-particle monocrystalline ternary oxide. The method can be used for improving the discharge voltage, compact density and specific capacity of a ternary cathode material. Compared with a traditional modifying process, the preparation method has the advantages that the flow is simplified, energy is conserved, consumption is reduced, production efficiency is high, lithium loss is small.

Description

technical field [0001] The invention relates to the field of battery materials, in particular to a high-pressure solid single crystal ternary positive electrode material, a preparation method and an application thereof. Background technique [0002] Since 1990, the Japanese sony company has used LiCoO 2 Since the successful commercialization of lithium-ion batteries, the research of lithium-ion batteries has made great progress. In terms of cathode materials, LiCoO is currently widely used in the market. 2 , Lithium Manganate, LiFePO 4 And nickel cobalt manganese / nickel cobalt lithium aluminate ternary material. [0003] In the field of new energy vehicles, with the introduction of the new national new energy subsidy policy, the requirements for the energy density of materials are getting higher and higher. In the power battery market, the market share of ternary cathode materials is increasing. At present, the main method to improve the energy density of ternary batte...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G53/00H01M4/505H01M4/525H01M10/0525
CPCC01G53/006C01P2004/03C01P2004/61C01P2006/11C01P2006/40H01M4/505H01M4/525H01M10/0525H01M2004/021Y02E60/10
Inventor 罗标訚硕管剑罗钢
Owner CNGR ADVANCED MATERIAL CO LTD
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