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Olive-shaped ternary material precursor, a preparation method and an application thereof

A ternary material, olive-shaped technology, applied in the field of olive-shaped ternary material precursor and its preparation, to achieve low cost and reduce surface energy

Inactive Publication Date: 2019-01-25
CENT SOUTH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In short, no matter what kind of nickel-cobalt-manganese ternary material co-precipitate precursor, its preparation method, process cost, performance, etc. have a very important impact on the nickel-cobalt-manganese ternary cathode material. The preparation of bulk co-precipitates is mainly concentrated on the spherical shape of nickel-cobalt-manganese ternary hydroxide, and only a small amount of work has been reported on the precursors of other shapes.

Method used

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  • Olive-shaped ternary material precursor, a preparation method and an application thereof
  • Olive-shaped ternary material precursor, a preparation method and an application thereof
  • Olive-shaped ternary material precursor, a preparation method and an application thereof

Examples

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Embodiment 1

[0045] A method for preparing an olive-shaped ternary material precursor in an embodiment of the present invention, comprising:

[0046] Weigh biuret, Ni(NO 3 ) 2 ·6H 2 O, Co(NO 3 ) 2 ·6H 2 O and Mn(NO 3 ) 2 50% aqueous solution raw material, in addition, assuming that all Ni, Co, and Mn metal elements are converted into carbonate precursors, continue to weigh polyethylene glycol PEG accounting for 3% of the theoretical carbonate precursor mass, and add the above five Mix and dissolve the raw materials with deionized water, control the concentration of the solution to 1mol / L, then transfer the solution to a hydrothermal reactor and heat it to 200°C for reaction, keep the reaction time for 15h, and cool the hydrothermal reaction naturally after the hydrothermal reaction is completed. kettle to room temperature, filter, wash, dry, and grind the resulting precipitate to obtain the nickel-cobalt-manganese ternary carbonate precursor.

[0047] After mixing and grinding the ...

Embodiment 2

[0049] A method for preparing an olive-shaped ternary material precursor in an embodiment of the present invention, comprising:

[0050] Weigh carbaamide, NiSO 4 ·6H 2 O. CoSO 4 ·7H 2 O and MnSO 4 ·H 2 O raw material, in addition, assuming that Ni, Co, and Mn metal elements are all converted into carbonate precursors, continue to weigh polyethylene glycol PEG accounting for 8% of the theoretical carbonate precursor mass, and the five raw materials weighed above Mix and dissolve with deionized water, control the solution concentration to 1mol / L, then transfer the solution to a hydrothermal reactor and heat to 160°C for reaction, keep the reaction time for 5h, and cool the hydrothermal reactor naturally to At room temperature, filter, wash, dry, and grind the resulting precipitate to obtain the nickel-cobalt-manganese ternary carbonate precursor;

[0051] After mixing and grinding the nickel-cobalt-manganese ternary carbonate precursor obtained in Example 2 and lithium hyd...

Embodiment 3

[0053] A method for preparing an olive-shaped ternary material precursor in an embodiment of the present invention, comprising:

[0054] Weigh biuret, Ni(Ac) respectively according to the molar ratio of biuret, nickel, cobalt and manganese as 20:5:2:3 2 4H 2 O, Co(Ac) 2 4H 2 O and Mn(Ac) 2 4H 2 O raw material, in addition, assuming that Ni, Co, and Mn metal elements are all converted into carbonate precursors, continue to weigh polyvinylpyrrolidone PVP accounting for 3% of the theoretical carbonate precursor mass, and use the five raw materials weighed above Deionized water is mixed and dissolved, and the total concentration of nickel, cobalt, and manganese metal ions is controlled to 0.6mol / L at the same time. Then, the fully dissolved mixed solution is transferred to a hydrothermal reaction kettle, and the reaction is carried out at 220°C. The reaction time is 16 hours. After the hydrothermal reaction is completed, the hydrothermal kettle is naturally cooled to room tem...

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Abstract

The invention discloses an olive-shaped ternary material precursor and a preparation method and application thereof, A lithium ion battery cathode material belong to that technical field of lithium ion battery cathode materials, NixCoyMnzCO3, wherein 0 & lt; x & lt; 1, 0 & lt; y & lt; 1, 0 & lt; z & lt; 1, x+y+z=1, the length of the olive-shaped ternary material precursor is 6-25 mu m, the diameter is 3-15 mu m, the shape of the olive-shaped secondary particles is olive, and the olive-shaped secondary particles are compactly superposed. The preparation method of the precursor provided by the invention can not only prepare an olive-shaped nickel-cobalt-manganese ternary carbonate precursor material with uniform particle size, By controlling the reaction parameters, polyvinylpyrrolidone, polyethylene glycol or polyacrylamide as dispersant, ammonium carbamate, urea, biuret, triuret, acetylurea or diacetylurea as precipitant, the olive-like secondary particle size of the precursor can be easily controlled. A large amount of sodium hydroxide and ammonia wat are not required to be consume, that cost is relatively low, and the process is more environmentally friendly.

Description

technical field [0001] The invention belongs to the technical field of positive electrode materials for lithium-ion batteries, and in particular relates to an olive-shaped ternary material precursor and a preparation method and application thereof. Background technique [0002] With the further improvement of the development and demand for clean and sustainable energy in today's society, lithium-ion batteries have used lithium cobalt oxide as the positive electrode since the early days due to their excellent characteristics such as high energy density, no memory effect, environmental friendliness, and sustainable charging and discharging. The mobile power supply and 3C digital products of materials are turning to the more powerful automotive power battery market. Since the traditional common cathode materials for lithium-ion batteries, such as lithium nickel oxide, lithium cobalt oxide, lithium manganese oxide, and lithium iron phosphate, cannot meet the current requirements...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/485H01M4/505H01M4/525H01M10/0525
CPCH01M4/485H01M4/505H01M4/525H01M10/0525Y02E60/10
Inventor 胡国荣杜柯彭忠东曹雁冰卢艳甘掌根夏进
Owner CENT SOUTH UNIV
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