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Nickel-cobalt lithium aluminate composite positive electrode material and preparation method thereof

A composite cathode material, lithium nickel cobalt aluminate technology, applied in battery electrodes, electrical components, electrochemical generators, etc., can solve the problems of poor cycle performance and rate performance, and achieve improved rate performance, improved cycle performance, inhibited The effect of interface impedance

Inactive Publication Date: 2015-05-06
BTR NEW MATERIAL GRP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In order to overcome the defects of the prior art, one of the purposes of the present invention is to provide a nickel-cobalt-lithium-aluminate composite cathode material, which solves the problems of poor cycle performance and rate performance of the current nickel-cobalt-lithium-aluminate cathode material

Method used

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  • Nickel-cobalt lithium aluminate composite positive electrode material and preparation method thereof
  • Nickel-cobalt lithium aluminate composite positive electrode material and preparation method thereof
  • Nickel-cobalt lithium aluminate composite positive electrode material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0054] (1) Weigh 7.5002g Al(NO 3 ) 3 9H 2 Dissolve O in 500mL of ionized water, stir until completely dissolved, and set aside;

[0055] (2) Weigh 1.2g NaOH and dissolve it in 500mL ionized water to prepare a lye with a concentration of 0.06mol / L, and set aside;

[0056] (3) Weigh 250g LiNi 0.815 co 0.15 al 0.035 o 2 Add it to the above aluminum nitrate solution, stir for 10 minutes, adjust the pH value to 8.5 with sodium hydroxide solution, continue to stir for 30 minutes, filter with suction, and wash with deionized water for 3 times;

[0057] (4) Then the obtained suction filtrate was kept at 300° C. for 4 hours in an air atmosphere, cooled to room temperature naturally, and sieved with a 200-mesh metal screen to obtain a sample compounded with Al2O3;

[0058] (5) Weigh 2.5g of acetylene black and disperse it in 500mL of pure water, stir and mix for 30min, add the sample compounded with aluminum oxide obtained above and continue to stir for 30min, then use the thicke...

Embodiment 2

[0062] (1) Weigh 15.004g Al(NO 3 ) 3 9H 2 Dissolve O in 500mL of ionized water, stir until completely dissolved, and set aside;

[0063] (2) Weigh 1.2g NaOH and dissolve it in 500mL ionized water to prepare a lye with a concentration of 0.06mol / L, and set aside;

[0064] (3) Weigh 250g Li 0.96 Ni 0.8 co 0.15 al 0.05 o 2 Add it to the above aluminum nitrate solution, stir for 30 minutes, adjust the pH value to 8 with sodium hydroxide solution, continue to stir for 10 minutes, filter with suction, and wash with deionized water for 5 times;

[0065] (4) Then the obtained suction filtrate was kept at 600° C. for 4 hours in an air atmosphere, cooled naturally to room temperature, and passed through a 200-mesh metal screen to obtain a sample compounded with Al2O3;

[0066] (5) Weigh 2.5g graphene and disperse it in 500mL pure water, stir and mix for 30min, add the sample compounded with aluminum oxide obtained above and continue to stir for 30min, then use thickener carboxym...

Embodiment 3

[0070] (1) Weigh 6.662g Al 2 (SO4) 3 18H 2 O was dissolved in 500mL deionized water, stirred until completely dissolved, and set aside;

[0071] (2) Weigh 1.2g NaOH and dissolve it in 500mL deionized water to prepare a lye solution with a concentration of 0.06mol / L for use;

[0072] (3) Weigh 250g LiNi 0.9 co 0.05 al 0.05 o 2 Add it to the above aluminum sulfate solution, stir for 30 minutes, adjust the pH value to 8 with sodium hydroxide solution, continue to stir for 30 minutes, filter with suction, and wash with deionized water for 3 times;

[0073] (4) Then the obtained suction filtrate was kept at 400° C. for 9 hours in an air atmosphere, naturally cooled to room temperature, and passed through a 200-mesh metal screen to obtain a sample compounded with Al2O3;

[0074] (5) Weigh 2.5g of carbon nanotubes and disperse them in 500mL of pure water, stir and mix for 30 minutes, add the sample compounded with aluminum oxide obtained above and continue to stir for 30 minut...

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Abstract

The invention relates to a nickel-cobalt lithium aluminate composite positive electrode material and a preparation method thereof. The nickel-cobalt lithium aluminate composite positive electrode material is prepared from the following components: (a) a nickel-cobalt lithium aluminate positive electrode material, (b) a metal oxide, and (c) a carbon source; the metal oxide and the carbon are orderly compounded on the surface of the nickel-cobalt lithium aluminate positive electrode material to obtain the nickel-cobalt lithium aluminate composite positive electrode material. According to the composite material, the cyclic performance and the rate performance of the positive electrode material are improved obviously, and the composite material can be applied to power batteries.

Description

technical field [0001] The invention belongs to the field of positive electrode materials for lithium ion batteries, and in particular relates to a nickel-cobalt lithium aluminate composite positive electrode material and a preparation method thereof. Background technique [0002] Lithium-ion batteries have the advantages of high energy density, high energy efficiency, long cycle life, no memory effect, fast charge and discharge, low self-discharge rate, wide operating temperature range, safety and reliability, etc., so it has become an important research direction for scientists all over the world. In recent years, with the rapid development of consumer electronics, electric vehicles, reserve power supplies, portable medical electronic equipment, industrial control, aerospace and other fields, there is an urgent need for rechargeable batteries with higher energy density, higher power density, and longer life. Put the energy storage device. [0003] High-nickel-based cathod...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/525
CPCH01M4/485H01M4/525H01M4/625H01M4/628H01M10/0525Y02E60/10
Inventor 任付金杨顺毅黄友元任建国
Owner BTR NEW MATERIAL GRP CO LTD
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