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Making method of zinc oxide or aluminum-doped zinc oxide coated lithium cobaltate electrode

A technology of aluminum-doped zinc oxide and coated lithium cobalt oxide, which is applied to battery electrodes, circuits, electrical components, etc., can solve problems such as coating and modification of difficult lithium cobalt oxide electrodes, and improve battery cycle performance. The method is simple and The effect of mature technology

Inactive Publication Date: 2014-02-19
UNIV OF ELECTRONIC SCI & TECH OF CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, it is difficult to use this wet chemical method for the overall coating modification of lithium cobalt oxide electrodes.

Method used

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  • Making method of zinc oxide or aluminum-doped zinc oxide coated lithium cobaltate electrode
  • Making method of zinc oxide or aluminum-doped zinc oxide coated lithium cobaltate electrode
  • Making method of zinc oxide or aluminum-doped zinc oxide coated lithium cobaltate electrode

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] This example is used to illustrate the preparation method of lithium cobaltate electrode and the method of coating and modifying it by radio frequency magnetron sputtering. The specific steps are as follows:

[0029] A. Preparation of conventional lithium cobalt oxide electrode

[0030] Weigh 80 parts by weight of lithium cobaltate, 10 parts by weight of acetylene black and mix evenly, then add 10 parts by weight of polyvinylidene fluoride (PVDF) with N-methylpyrrolidone (NMP) as solvent, mix and grind to make a slurry and uniform Coated on aluminum foil and dried at 110°C to make a conventional lithium cobalt oxide electrode.

[0031] B. Install the target

[0032] Install the zinc oxide (ZnO) target in the magnetron sputtering chamber

[0033] C. Install the substrate

[0034] The prepared conventional lithium cobalt oxide electrode is installed in the magnetron sputtering chamber as a substrate;

[0035] D. Working gas

[0036] Vacuumize the magnetron sputtering c...

Embodiment 2

[0045] This example is used to illustrate the preparation method of lithium cobaltate electrode and the method of coating and modifying it by radio frequency magnetron sputtering. The specific steps are as follows:

[0046] A. Preparation of conventional lithium cobalt oxide electrode

[0047] Weigh 80 parts by weight of lithium cobaltate, 10 parts by weight of acetylene black and mix evenly, then add 10 parts by weight of polyvinylidene fluoride (PVDF) with N-methylpyrrolidone (NMP) as solvent, mix and grind to make a slurry and uniform Coated on aluminum foil and dried at 110°C to make a conventional lithium cobalt oxide electrode.

[0048] B. Install the target

[0049] Install the zinc oxide (ZnO) target in the magnetron sputtering chamber

[0050] C. Install the substrate

[0051] The prepared conventional lithium cobalt oxide electrode is installed in the magnetron sputtering chamber as a substrate;

[0052] D. Working gas

[0053] Vacuumize the magnetron sputtering...

Embodiment 3

[0059] This example is used to illustrate the preparation method of lithium cobaltate electrode and the method of coating and modifying it by radio frequency magnetron sputtering. The specific steps are as follows:

[0060] A. Preparation of conventional lithium cobalt oxide electrode

[0061]Weigh 80 parts by weight of lithium cobaltate, 10 parts by weight of acetylene black and mix evenly, then add 10 parts by weight of polyvinylidene fluoride (PVDF) with N-methylpyrrolidone (NMP) as solvent, mix and grind to make a slurry and uniform Coated on aluminum foil and dried at 110°C to make a conventional lithium cobalt oxide electrode.

[0062] B. Install the target

[0063] Install the aluminum-doped zinc oxide target in the magnetron sputtering chamber (the target contains Al 2 o 3 5.0wt.%);

[0064] C. Install the substrate

[0065] The prepared conventional lithium cobalt oxide electrode is installed in the magnetron sputtering chamber as a substrate;

[0066] D. Workin...

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Abstract

A making method of a zinc oxide or aluminum-doped zinc oxide coated lithium cobaltate electrode belongs to the technical field of batteries. In the invention, zinc oxide or aluminum-doped zinc oxide deposited on a routine lithium cobaltate electrode through a radio frequency magnetron sputtering technology as a coating material to obtain the coated and modified lithium cobaltate electrode. The method concretely comprises the following steps: mixing lithium cobaltate powder with a conductive additive, a binder and a solvent, grinding to prepare a slurry, coating a current collector with the slurry, drying the coated current collector to make the routine sheet lithium cobaltate electrode, and depositing the coating layer of zinc oxide or aluminum-doped zinc oxide by adopting the radio frequency magnetron sputtering technology to realize the coating modification of the lithium cobaltate electrode. The method improves the electrode interface situation, effectively inhibit the secondary reactions on the high-potential interval electrode surface, reduces the capacity loss and improves the structural stability of an active material, so the working voltages of the batteries are widened, and the energy density, the power density and the cycle performance of the batteries are improved.

Description

technical field [0001] The invention belongs to the technical field of batteries, and relates to a positive electrode material of a lithium ion battery, in particular to a method for preparing a surface-modified lithium cobalt oxide electrode. Background technique [0002] As people pay more and more attention to the environment and energy, lithium-ion batteries as green energy are more and more popular due to their advantages such as high working voltage, long cycle life, low self-discharge rate, good safety performance, and no memory effect. It is widely used in electronic products such as notebook computers, mobile phones, and digital cameras. At the same time, the application of lithium-ion batteries is rapidly developing in the fields of electric vehicles, aviation and navigation, which puts forward higher requirements for the safety performance, power density, energy density and cycle life of lithium-ion batteries. [0003] As one of the core components of lithium-ion...

Claims

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Application Information

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IPC IPC(8): H01M4/1391
CPCY02E60/122H01M4/525H01M4/628Y02E60/10
Inventor 戴新义许进周爱军李晶泽
Owner UNIV OF ELECTRONIC SCI & TECH OF CHINA
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