High-temperature stability nickel cobalt lithium manganate composite electrode as well as preparation method and application thereof

A nickel-cobalt lithium manganate, high-temperature stability technology, applied in battery electrodes, circuits, electrical components, etc., can solve the problems of poor high stability and insufficient compaction density, and achieve small particle size, adjustable particle size, and particle size. uniform effect

Inactive Publication Date: 2018-03-06
长沙仲善新能源科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The invention provides a high-temperature stable nickel-cobalt-lithium manganese oxide composite electrode and its preparation method and application. It has the characteristics of high precision. The spherical precursor is first prepared by the inverse emulsion method, and after pre-sintering, it is wrapped with aluminum hydroxide gel. , and then calcined to prepare a composite material of nickel-cobalt-lithium manganese oxide wrapped with alumina, which is used to solve the problems of poor stability and insufficient compaction density of existing nickel-cobalt lithium manganate electrode materials

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] A preparation method of a high temperature stable nickel cobalt lithium manganate composite electrode, comprising the following steps:

[0024] S1. Lithium acetate, nickel sulfate, cobalt sulfate and manganese sulfate are mixed with mol ratio 1:0.47:0.2:033 to obtain mixture, in parts by weight, get 20 parts of mixtures and add in 100 parts of water to dissolve and obtain water phase;

[0025] S2. in parts by weight, get 100 parts of liquid paraffin and 10 parts of emulsifiers and mix, then add in the reaction vessel and stir with a rotating speed of 450r / min, then slowly add 10 parts of water phase to the reaction vessel, then add to the reactor Ammonia gas was continuously fed into the bottom, and after 12 hours of reaction, the precursor was obtained by filtration. The precursor was dried, and then calcined at 550 °C for 10 hours under the protection of inert gas to obtain a ternary compound;

[0026] S3. In parts by weight, add 0.7 part of aluminum nitrate to 10 par...

Embodiment 2

[0030] A preparation method of a high temperature stable nickel cobalt lithium manganate composite electrode, comprising the following steps:

[0031] S1. Lithium acetate, nickel sulfate, cobalt sulfate and manganese sulfate are mixed with mol ratio 1:0.47:0.2:033 to obtain mixture, in parts by weight, get 26 parts of mixtures and add in 100 parts of water and dissolve to obtain water phase;

[0032] S2. in parts by weight, get 100 parts of cyclohexane and 8 parts of emulsifiers and mix, then add in the reaction vessel and stir with a rotating speed of 600r / min, then slowly add 15 parts of water in the reaction vessel, then add to the reaction vessel Ammonia gas was continuously fed into the bottom of the vessel, and after 12 hours of reaction, the precursor was obtained by filtration, dried, and then calcined at 530 °C for 9 hours under the protection of inert gas to obtain a ternary compound;

[0033] S3. In parts by weight, add 0.7 part of aluminum nitrate to 10 parts of wa...

Embodiment 3

[0037] A preparation method of a high temperature stable nickel cobalt lithium manganate composite electrode, comprising the following steps:

[0038] S1. Lithium acetate, nickel sulfate, cobalt sulfate and manganese sulfate are mixed with mol ratio 1:0.47:0.2:033 to obtain a mixture, in parts by weight, get 30 parts of mixtures and add in 100 parts of water and dissolve to obtain a water phase;

[0039] S2. in parts by weight, get 100 parts of kerosene and 12 parts of emulsifiers and mix, then add to the reaction vessel and stir at a rotating speed of 300r / min, then slowly add 13 parts of water phase to the reaction vessel, then to the bottom of the reactor Ammonia gas was continuously introduced, and the precursor was obtained by filtration after reaction for 12 hours. The precursor was dried, and then calcined at 540 °C for 8 hours under the protection of inert gas to obtain a ternary complex;

[0040] S3. In parts by weight, add 0.7 part of aluminum nitrate to 10 parts of ...

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PUM

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Abstract

The invention discloses a high-temperature stability nickel cobalt lithium manganate composite electrode as well as a preparation method and application thereof. The preparation method disclosed by the invention comprises the following steps: mixing lithium acetate, nickel sulfate, cobalt sulfate and manganese sulfate according to a molar ratio of 1:0.47:0.2:0.33 to obtain a mixture, adding 20-30weight parts of the mixture into 100 weight parts of water, and dissolving to obtain an aqueous phase; adding ammonia gas into an oil phase, stabilizing the oil-water phase by an emulsifier, preparinga precursor by an inverse emulsion method, and pre-sintering to obtain a ternary complex; coating the ternary complex by aluminum hydroxide, calcining at the temperature of 980-1050 DEG C under inertgas shielding for 4-8 hours, finally furnace cooling, thereby obtaining the composite electrode material. According to the method disclosed by the invention, the problems that the conventional nickelcobalt lithium manganate electrode material is poor in high stability and the compaction density is not high enough are solved.

Description

technical field [0001] The invention belongs to the technical field of positive electrode materials for lithium ion batteries, and relates to a high-temperature stable nickel-cobalt-lithium-manganate composite electrode and a preparation method and application thereof. Background technique [0002] As the positive electrode material of the battery, the single-element layered material LiNiO 2 , LiCoO 2 and LiMn 2 O 4 Both have certain defects, LiNiO 2 The capacity is relatively high, but it is difficult to synthesize, process and use; LiCoO 2 Limited by the proportion of lithium ion deintercalation, the capacity is relatively low, and it is not suitable for large-capacity batteries; high safety, LiMn 2 O 4 However, the crystal structure is unstable during the charging and discharging process, and the cycle performance is relatively poor, especially the high temperature cycle performance. while LiNi 1-x-y Co x Mn y O 2 Due to the synergistic effect of the electroche...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/36H01M4/485H01M4/505H01M4/525H01M4/62H01M10/0525
CPCH01M4/366H01M4/485H01M4/505H01M4/525H01M4/62H01M4/628H01M10/0525Y02E60/10
Inventor 不公告发明人
Owner 长沙仲善新能源科技有限公司
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