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High nickel and low nickel alternated shell-core-structure ternary lithium battery electrode material and preparation method

A ternary lithium battery, shell-core structure technology, applied in battery electrodes, secondary batteries, structural parts, etc., can solve problems such as shell-core segregation, and achieve the effect of uniform coating and high coating efficiency

Inactive Publication Date: 2018-08-07
CHENDU NEW KELI CHEM SCI CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0011] In view of the problems existing in the prior art above, the first object of the present invention is to provide an electrode material for a ternary lithium battery with a core-shell structure between high and low nickel phases, which overcomes the need for a single high-nickel phase. Core and low nickel are the problems of shell core segregation caused by different deformations of the shell pole

Method used

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  • High nickel and low nickel alternated shell-core-structure ternary lithium battery electrode material and preparation method

Examples

Experimental program
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Effect test

Embodiment 1

[0029] (1) Prepare high-nickel and low-nickel nickel-cobalt-lithium manganese oxide precursor solutions A and B respectively. The concentration of lithium in solution A is 0.5mol / L, the concentration of nickel is 0.4mol / L, and the concentration of cobalt is 0.05mol / L, the concentration of manganese is 0.05mol / L and B liquid, the concentration of lithium in B liquid is 0.5mol / L, the concentration of nickel is 0.25mol / L, the concentration of cobalt is 0.05mol / L, and the concentration of manganese is 0.20 mol / L;

[0030] (2) Divide the long-diameter valve inlet to the discharge port of the high-pressure homogenizer into 4 sections, each section is provided with a feeding nozzle, and the radial distance between two adjacent feeding nozzles along the long-diameter valve is 1cm ; In the long-diameter valve from the air inlet to the feed nozzle of the discharge port, the liquid A-B liquid-A liquid-B liquid is sprayed sequentially, and the air inlet of the long-diameter valve is fed ...

Embodiment 2

[0033] (1) Prepare high-nickel and low-nickel nickel-cobalt-lithium manganese oxide precursor solutions A and B respectively. The concentration of lithium in solution A is 1.0mol / L, the concentration of nickel is 0.8mol / L, and the concentration of cobalt is 0.10mol / L, the concentration of manganese is 0.10mol / L and B liquid, the concentration of lithium in B liquid is 0.5mol / L, the concentration of nickel is 0.25mol / L, the concentration of cobalt is 0.05mol / L, and the concentration of manganese is 0.20 mol / L;

[0034] (2) Divide the long-diameter valve inlet to the discharge port of the high-pressure homogenizer into 6 sections, each section is provided with a feeding nozzle, and the radial distance between two adjacent feeding nozzles along the long-diameter valve is 2cm ; (3), spray A liquid-B liquid-A liquid-B liquid-A liquid-B liquid in sequence in the feed nozzle of the long-diameter valve from the air inlet to the discharge port, and at the same time in the long-diamete...

Embodiment 3

[0037] (1) Prepare high-nickel and low-nickel nickel-cobalt-lithium manganese oxide precursor solutions A and B respectively. The concentration of lithium in solution A is 2.0mol / L, the concentration of nickel is 1.6mol / L, and the concentration of cobalt is 0.20mol / L, the concentration of manganese is 0.20mol / L and B liquid, the concentration of lithium in B liquid is 1.5mol / L, the concentration of nickel is 0.75mol / L, the concentration of cobalt is 0.15mol / L, the concentration of manganese is 0.60 mol / L;

[0038] (2) Divide the long-diameter valve inlet to the discharge port of the high-pressure homogenizer into 6 sections, each section is provided with a feeding nozzle, and the radial distance between two adjacent feeding nozzles along the long-diameter valve is 3cm ; spray A liquid-B liquid-A liquid-B liquid-A liquid-B liquid into the feeding nozzles of the long diameter valve from the air inlet to the discharge port section, and at the same time in the inlet of the long d...

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Abstract

The invention relates to the field of lithium battery electrode materials and in particular relates to a high nickel and low nickel alternated shell-core-structure ternary lithium battery electrode material and a preparation method. The high nickel and low nickel alternated shell-core-structure ternary lithium battery electrode material provided by the invention is of a shell-core structure; highnickel and low nickel are repeatedly arrayed in sequence from a shell to a core and the number of times of repeatedly arraying is greater than or equal to 2; the outermost-layer shell of the high nickel and low nickel alternated shell-core structure is the low nickel; the high nickel is LiNi0.8Co0.1Mn0.1O2; the low nickel is LiNi0.5Co0.1Mn0.4O2. According to the high nickel and low nickel alternated shell-core-structure ternary lithium battery electrode material, the problem that the single high nickel is used as the core and the low nickel is used as the shell to extremely easily cause different deformation and the core and the shell are separated is solved through high nickel and low nickel alternation.

Description

technical field [0001] The invention relates to the field of lithium battery electrode materials, in particular to a ternary lithium battery electrode material with a shell-core structure between high and low nickel phases and a preparation method thereof. Background technique [0002] Compared with traditional storage batteries, lithium-ion batteries not only have higher energy, stronger discharge capacity, and longer cycle life, but also have an energy storage efficiency of more than 90%. The above characteristics determine the use of lithium-ion batteries in electric vehicles, storage power, etc. Great prospects for development. As the functions and performance of various electronic products continue to improve, the requirements for battery energy density are also more intense. In the past, in order to increase the capacity of the battery, almost all started from the design of the battery, but this method has reached its limit. If you want to increase the capacity of the...

Claims

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Application Information

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IPC IPC(8): H01M4/36H01M4/505H01M4/525H01M10/0525
CPCH01M4/366H01M4/505H01M4/525H01M10/0525Y02E60/10
Inventor 陈庆曾军堂
Owner CHENDU NEW KELI CHEM SCI CO LTD
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