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A kind of preparation method of high-capacity lithium cobalt oxide cathode material

A cathode material, lithium cobalt oxide technology, applied in chemical instruments and methods, battery electrodes, cobalt compounds, etc., can solve the problem that lithium cobalt oxide cannot meet the requirements, etc., and achieves the benefits of solution exchange and ion transfer, low production costs, and reduced production costs. The effect of electrode polarization

Active Publication Date: 2017-01-11
CNGR ADVANCED MATERIAL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In recent years, with the further miniaturization and multi-functionalization of electronic products, higher requirements have been placed on the energy density of battery output, and conventional lithium cobalt oxide can no longer meet the requirements.

Method used

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  • A kind of preparation method of high-capacity lithium cobalt oxide cathode material

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Take 5g of lithium cobalt oxide positive electrode material, the average particle size D50 is 8.53 μm, and perform electroless nickel plating treatment. The process of electroless nickel plating is:

[0024] 1. Add the above-mentioned lithium cobaltate into the alcohol aqueous solution with a volume ratio of alcohol to water of 1:1 and a total volume of 1L. The temperature is 25° C., the stirring speed is 200 rpm, and the ultrasonic vibration is performed at a frequency of 30 kHz for 5 min.

[0025] The lithium cobaltate was centrifuged and washed several times with deionized water.

[0026] 2. Add the cleaned lithium cobaltate into a solution whose composition is stannous chloride (SnCl2 2H2O) 4g / L, 37% HCl 4mL / L, OP-101mL / L, solvent is deionized water, and the volume is 1L . The temperature is 25°C, the stirring speed is 200 revolutions per minute, and the time is 2 minutes.

[0027] Lithium cobaltate was centrifuged and washed with deionized water to pH 7.

[002...

Embodiment 2

[0035] Take 20g of lithium cobalt oxide positive electrode material, the average particle size D50 is 13.72 μm, and perform electroless nickel plating treatment. The process of electroless nickel plating is:

[0036] 1. Add the above-mentioned lithium cobaltate into the alcohol aqueous solution with a volume ratio of alcohol to water of 1:2 and a total volume of 1L. The temperature is 25° C., the stirring speed is 200 rpm, and the ultrasonic vibration is performed at a frequency of 35 kHz for 8 min.

[0037] The lithium cobaltate was centrifuged and washed several times with deionized water.

[0038] 2. Add the cleaned lithium cobaltate to the composition of stannous chloride (SnCl2 2H2O) 7g / L, 37% HCl 5mL / L, 0.5mL / L each of sucrose ester and OP-10, and the solvent is deionized water. in a solution with a volume of 1 L. The temperature is 25° C., the stirring speed is 400 revolutions per minute, and the time is 2 minutes.

[0039] Lithium cobaltate was centrifuged and washe...

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Abstract

The invention discloses a preparing method of a high-capacity lithium cobalt oxide positive electrode material. The positive electrode material is formed by the fact that a nickel coating layer is wrapped on the surface of lithium cobalt oxide. According to the preparing method, the lithium cobalt oxide is subjected to sensitization, activation and reduction treatment under the effect of dispersing agents, and then the nickel coating layer is plated; and then, the lithium cobalt oxide with the plated nickel coating layer is subjected to heat treatment, and the nickel wrapping lithium cobalt oxide positive electrode material is obtained. The preparing method is easy to operate, the technology condition is mild, cost is low, according to the prepared nickel wrapping lithium cobalt oxide positive electrode material, nickel coating layer wrapping is even, the structure is stable, and the material can be used for preparing a lithium ion battery which is good in conductivity, high in specific capacity and high in power density.

Description

technical field [0001] The invention relates to a preparation method of a high-capacity lithium cobalt oxide positive electrode material, belonging to the field of lithium ion battery positive electrode materials. Background technique [0002] Since Japan's Sony Corporation took the lead in developing and commercializing lithium-ion batteries in 1990, lithium-ion batteries have developed rapidly. Today lithium-ion batteries have been widely used in various fields of civil and military use. With the continuous advancement of science and technology, people have put forward more and higher requirements for the performance of batteries: the miniaturization and personalized development of electronic equipment requires batteries to have smaller volumes and higher specific energy output; aerospace energy requirements Batteries have cycle life, better low-temperature charge and discharge performance, and higher safety performance; electric vehicles require batteries with large capa...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M4/525C01G51/00
CPCC01G51/00H01M4/131H01M4/525Y02E60/10
Inventor 田东韩飞王爽
Owner CNGR ADVANCED MATERIAL CO LTD
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