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A kind of lithium ion battery composite cathode material and preparation method thereof

A composite positive electrode material and lithium-ion battery technology, which is applied in battery electrodes, secondary batteries, circuits, etc., can solve the problems that the cracking and pulverization of positive electrode material particles cannot be effectively suppressed, and achieve stable lattice structure, improve rate performance, The effect of increasing density

Active Publication Date: 2022-07-12
BEIJING WELION NEW ENERGY TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The above three invention patents have improved the surface interface problem of the positive electrode material, but cannot effectively inhibit the cracking and pulverization of the positive electrode material particles

Method used

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  • A kind of lithium ion battery composite cathode material and preparation method thereof
  • A kind of lithium ion battery composite cathode material and preparation method thereof
  • A kind of lithium ion battery composite cathode material and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0039] A preparation method of a lithium ion battery composite positive electrode material, comprising the following steps:

[0040] (1) The median particle size of the bulk positive electrode material precursor selected in this example is Ni with a median particle size of about 10 μm 0.8 Co 0.1 Mn 0.1 (OH) 2 sample, whose structure is figure 1 shown.

[0041] 1mol Ni 0.8 Co 0.1 Mn 0.1 (OH) 2 (92.34 g) was calcined at 300 °C for 3 h in an air atmosphere to obtain a bulk cathode material porous precursor. The structure of the bulk cathode material porous precursor is as follows figure 2 As shown, it can be seen that there are many voids / pores in the bulk cathode material porous precursor.

[0042] (2) Dissolve 0.015 mol of lanthanum nitrate and 0.01 mol of zirconium nitrate in 50 mL of deionized water, then add 1 mol of the above-mentioned porous precursor of bulk positive electrode material, mix well and dry to obtain a dry sample.

[0043] (3) Mix 1 mol of the abo...

Embodiment 2

[0054] A preparation method of a lithium ion battery composite positive electrode material, comprising the following steps:

[0055] (1) Co(OH) with a median particle size of about 10 μm in the bulk cathode material precursor selected in this example 2 Sample; 1mol of Co(OH) 2 It was calcined at 300 °C for 3 h in an air atmosphere to obtain a porous precursor of bulk cathode material.

[0056] (2) Dissolve 0.015 mol of lanthanum nitrate and 0.01 mol of zirconium nitrate in 50 mL of deionized water, then add 1 mol of the above-mentioned porous precursor of bulk positive electrode material, mix well and dry to obtain a dry sample.

[0057] (3) Mix 1 mol of the above-mentioned dry sample and 1.035 mol of lithium nitrate uniformly to obtain a lithium preparation mixture.

[0058] (4) The above-mentioned lithium-prepared mixture was calcined at 1000 °C for 15 h in an air atmosphere to obtain a solid electrolyte Li 7 La 3 Zr 2 O 12 Filled / Embedded LiCoO 2 Composite cathode ma...

Embodiment 3

[0062] A preparation method of a lithium ion battery composite positive electrode material, comprising the following steps:

[0063] (1) Ni(OH) with a median particle size of about 10 μm in the bulk cathode material precursor selected in this example 2 Sample; 1mol Ni(OH) 2 It was calcined at 300 °C for 3 h in an air atmosphere to obtain a porous precursor of bulk cathode material.

[0064] (2) Dissolve 0.015 mol of lanthanum nitrate and 0.01 mol of zirconium nitrate in 50 mL of deionized water, then add 1 mol of the above-mentioned porous precursor of bulk positive electrode material, mix well and dry to obtain a dry sample.

[0065] (3) Mix 1 mol of the above-mentioned dry sample and 1.035 mol of lithium nitrate uniformly to obtain a lithium preparation mixture.

[0066] (4) The above-mentioned lithium compounded mixture was placed in an oxygen atmosphere and calcined at 800 °C for 15 h to obtain a solid electrolyte Li 7 La 3 Zr 2 O 12 Filled / Embedded LiNiO 2 Composit...

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Abstract

The invention discloses a lithium-ion battery composite positive electrode material, a preparation method and application thereof, and belongs to the technical field of energy storage materials. The lithium-ion battery composite positive electrode material is prepared by filling / embedding the internal and external voids / pores of the body positive electrode material with a solid electrolyte, wherein the body positive electrode material is lithium cobaltate, lithium nickelate, lithium manganate, nickel cobalt manganese At least one of lithium oxide, lithium nickel cobalt aluminate, lithium nickel manganate and lithium-rich layered oxide; the solid electrolyte is Li 1+a Al a M 2‑a (PO 4 ) 3 , Li 3b La 2 / 3‑b TiO 3 , LiZr 2‑c Ti c (PO 4 ) 3 and Li 7‑2n‑m M’ n La 3 Zr 2‑m M” m O 12 one or more of. The invention effectively improves the Coulombic efficiency, rate performance and cycle life of the positive electrode material, and well improves its compatibility in lithium ion batteries.

Description

technical field [0001] The invention relates to the technical field of energy storage materials, in particular to a lithium ion battery composite positive electrode material and a preparation method thereof. Background technique [0002] Lithium-ion batteries have many advantages, such as high specific energy, long cycle life, and no memory effect, and have been widely used in consumer electronic equipment, power tools, and energy storage. As one of the core components of lithium-ion batteries, cathode materials have always been the focus of research, whether in traditional batteries containing organic electrolytes or in solid-state batteries using solid electrolytes. Commonly used cathode materials include lithium cobalt oxide, lithium manganate, lithium iron phosphate, lithium nickel cobalt manganate, lithium nickel cobalt aluminate and lithium-rich manganese-based materials. For different cathode materials, the solution to surface interface problems will also be different...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M4/36H01M4/485H01M4/505H01M4/525H01M4/62H01M10/0525H01M10/0562
CPCH01M4/362H01M4/485H01M4/505H01M4/525H01M4/624H01M4/628H01M10/0525H01M10/0562Y02E60/10
Inventor 张振宇陈相雷黄杰
Owner BEIJING WELION NEW ENERGY TECH CO LTD