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Preparation method of tungsten-coated manganese-aluminum-cobalt anode material

A cathode material, lithium-coated technology, applied in battery electrodes, electrical components, circuits, etc., can solve problems such as poor ionic and electronic conductivity, and achieve the effects of increasing activity, enhancing cycle stability, and suppressing side reactions

Inactive Publication Date: 2017-09-15
SUZHOU SICHUANGYUANBO ELECTRONICS TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] LiMnAlCo has poor ionic and electronic conductivity

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] According to the molar ratio of Li:Mn:Al:Co:Ni=1:0.7:0.15:0.1:0.05, where x=0.15-0.25, y=0.1-0.15, z=0.05-0.1, lithium oxalate, manganese oxide, Aluminum oxalate, cobalt oxide and nickel oxide are mixed and ball-milled to obtain precursor powder; plasma arc is applied to the precursor powder in a reducing atmosphere to melt the reaction powder, the plasma arc voltage is 30kV, and the plasma arc current is 800A.

[0024] The molten reaction powder is sprayed into the cooling device with a reducing gas, and after cooling, the particles are crushed and sieved, and the sieved spherical nickel-doped lithium-manganese-aluminum-cobalt with a particle size of 5 microns is obtained; The diameter of the nozzle is 3 mm; the reducing gas is a mixture of nitrogen and hydrogen, wherein the volume percentage of hydrogen in the mixed gas is 1%.

[0025] Dissolve the tungsten-containing compound in deionized water, fully stir until it is completely dissolved, and mix uniformly to obtain...

Embodiment 2

[0028] According to the molar ratio of Li:Mn:Al:Co:Ni=1:0.5:0.25:0.15:0.1, lithium oxalate, manganese oxide, aluminum oxalate, cobalt oxide and nickel oxide are mixed into powder by ball milling to obtain precursor powder; The precursor powder is subjected to a plasma arc in a reducing atmosphere to melt the reaction powder, the plasma arc voltage is 30kV, and the plasma arc current is 600A.

[0029] The molten reaction powder is sprayed into the cooling device with a reducing gas, and after cooling, the particles are crushed and sieved, and the sieved spherical nickel-doped lithium manganese aluminum cobalt with a particle size of 10 microns is obtained; The diameter of the nozzle is 6 mm; the reducing gas is a mixture of nitrogen and hydrogen, wherein the volume percentage of hydrogen in the mixed gas is 3%.

[0030] Dissolve the tungsten-containing compound in deionized water, fully stir until it is completely dissolved, and mix uniformly to obtain a coating solution; the t...

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Abstract

The invention relates to a preparation method of a tungsten-coated manganese-aluminum-cobalt anode material. The preparation method is easy in operation and low in cost and spends a short time; a uniformly-distributed fast ion conductor coating layer is formed on the surface of the anode material, so that the circle and rate capability of the anode material are effectively improved by virtue of the properties of a fast ion conductor and the action of the coating layer.

Description

technical field [0001] The invention relates to the technical field of lithium batteries, in particular to a preparation method of a tungsten-coated lithium-manganese-aluminum-cobalt positive electrode material. Background technique [0002] As a new type of renewable green energy, lithium-ion batteries have been widely used in small electronic devices (mobile phones, laptops, etc.) , and has gradually become one of the most important candidate power sources for electric vehicles; in addition, in the field of national defense and military, it also covers the equipment of many arms such as land, sea, air, and space. With the advancement of science and technology, we have put forward higher requirements for lithium-ion batteries, and it is of great practical significance to seek high-performance lithium-ion batteries. Among them, the performance of the cathode material has become a key factor limiting the further improvement of the performance of lithium-ion batteries, and it...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/36H01M4/505H01M4/525H01M4/62
CPCH01M4/364H01M4/505H01M4/525H01M4/628Y02E60/10
Inventor 不公告发明人
Owner SUZHOU SICHUANGYUANBO ELECTRONICS TECH CO LTD