Ternary anode material, preparation method thereof and lithium-ion battery containing material

A lithium-ion battery and cathode material technology, applied in battery electrodes, secondary batteries, circuits, etc., can solve the problems of metal and oxygen atom dissolution, capacity loss, low initial charge and discharge efficiency, etc., to improve electronic and ion conductivity , Improve the decline in electronic conductivity and improve the effect of layered structure instability

Inactive Publication Date: 2019-06-21
江西星盈科技有限公司
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Problems solved by technology

[0003] In recent years, many domestic companies have adopted new high-temperature sintering technology to synthesize micron-sized high-nickel and low-column ternary single crystal particles similar to lithium cobaltate. The prepared micron-sized primary single crystal particles have small particles and more complete crystal structure. , high compaction density and excellent electrode processing performance, although it has greatly reduced the micro-crack phenomenon caused by the expansion of particles similar to the secondary particle positive electrode material during charge and

Method used

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  • Ternary anode material, preparation method thereof and lithium-ion battery containing material
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  • Ternary anode material, preparation method thereof and lithium-ion battery containing material

Examples

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Example Embodiment

[0098] Implementation case 1:

[0099] Step 1: Follow the lithium phosphate Li 3 PO 4 Coated amount and coated Li 1.02 Ni 0.55 Co 0.15 Mn 0.30 O 2 The mass ratio is 0.01% calculated by a certain amount of hydrogen phosphate diamine, according to Li 1.02 Ni 0.55 Co 0.15 Mn 0.30 O 2 The mass ratio is 0.1% to calculate a certain amount of vinylpyrrolidone.

[0100] Take the quantitative hydrogen phosphate diamine and polyvinylpyrrolidone obtained from the above calculation, dissolve it in the solvent ethanol, stir for 20h, then add a certain quality of high nickel low diamond single crystal ternary cathode material to the above solution and continue to stir for 24h, then The resulting mixed solution was stirred vigorously under heating at 45°C for 8 hours, and the solvent was evaporated to obtain a mixed precursor powder. The mixed precursor powder was sieved and calcined at 500°C for 6 hours to obtain a high nickel low diamond sheet coated with lithium phosphate. Crystal ternary mate...

Example Embodiment

[0102] Implementation case 2:

[0103] The parameters of sample preparation are divided by the following:

[0104] Lithium Phosphate Li 3 PO 4 Coated amount and coated Li 1.02 Ni 0.55 Co 0.15 Mn 0.30 O 2 The mass ratio of the product is changed to 0.1%,

[0105] Polypyrrole and Li 1.02 Ni 0.55 Co 0.15 Mn 0.30 O 2 In addition to changing the mass ratio to 1%,

[0106] The rest is consistent with Example 1.

Example Embodiment

[0107] Implementation case 3:

[0108] The parameters of sample preparation are divided by the following:

[0109] Lithium Phosphate Li 3 PO 4 Coated amount and coated Li 1.02 Ni 0.55 Co 0.15 Mn 0.30 O 2 The mass ratio of the product is changed to 0.2%,

[0110] Polypyrrole and Li 1.02 Ni 0.55 Co 0.15 Mn 0.30 O 2 In addition to changing the mass ratio to 3%,

[0111] The rest is consistent with Example 1.

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Abstract

The invention relates to the field of lithium-ion batteries and discloses a ternary anode material, a preparation method thereof and a lithium-ion battery containing the material. The process comprises the steps that a ternary anode material and conductive inorganic salt are mixed uniformly and dissolved in a solvent to obtain a first mixed solution, and the solvent in the first mixed solution isdried by distillation to obtain mixed powder; the mixed powder is calcined to obtain a calcination product containing ternary anode material particles coated with an inorganic lithium salt compound; an oxidant, conductive polymer monomers and the calcination product are dissolved in a solvent to obtain a second mixed solution, the conductive polymer monomers are subject to oxidative polymerizationto generate a conductive polymer, and the outer layer of the inorganic lithium salt compound of all the ternary anode material particles is coated with the conductive polymer; and the mixed solutionis filtered, washed and dried, and then the ternary anode material of the lithium-ion battery is obtained. The technical scheme is beneficial for suppressing side effects of an electrolytic solution on the surface of the high-nickel ternary anode material; the first discharge capacity of the lithium-ion battery is improved; and rate discharge and circulation properties of the high-nickel ternary anode material are enhanced.

Description

technical field [0001] The invention relates to the field of lithium ion batteries, and discloses a ternary positive electrode material, a preparation method thereof and a lithium ion battery containing the material. Background technique [0002] Since Sony successfully commercialized lithium-ion secondary batteries in 1993, after more than 20 years of development, lithium-ion batteries represented by lithium cobalt acid have occupied most of the consumer battery market. The current strong environmental awareness and policies of the government and society are promoting With the development of electrification of lithium batteries, high-nickel ternary cathode materials have the advantages of high energy density and low cost compared with conventional lithium cobalt acid and lithium iron phosphate materials, so they have become one of the main research and development directions of enterprises and research institutes. However, most of these materials have problems such as serio...

Claims

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Application Information

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IPC IPC(8): H01M4/36H01M4/505H01M4/525H01M4/62H01M10/0525
CPCY02E60/10
Inventor 郭永兴刘仁月梁福勇卢和嘉崔献广
Owner 江西星盈科技有限公司
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