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Power-type nickel cobalt manganese acid lithium material as well as preparation method and application thereof

A nickel-cobalt lithium manganate, power type technology, applied in the field of power type nickel-cobalt manganate lithium manganate material and its preparation, can solve the problems of large particle size and difficult to control, achieve high specific capacity, reduce use cost and large surface area Effect

Active Publication Date: 2014-05-21
GUANGDONG BRUNP RECYCLING TECH +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, although the above-mentioned existing synthesis methods can obtain nickel-cobalt lithium manganese oxide materials, the size of the particles is relatively large and difficult to control

Method used

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  • Power-type nickel cobalt manganese acid lithium material as well as preparation method and application thereof
  • Power-type nickel cobalt manganese acid lithium material as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] Embodiment 1: Preparation of dynamic nickel cobalt lithium manganese oxide material

[0031] (1) According to the concentration of lithium acetate 3mol / L, nickel acetate 1mol / L, cobalt acetate 1mol / L, manganese acetate 1mol / L, prepare 100mL mixed aqueous solution, add citric acid, so that the concentration of sodium citrate in the system is 3mol / L, Aging at 60° C. for 10 h until viscous and transparent, and continuing aging at room temperature to a viscosity of 2 Pa·S to obtain a sol precursor.

[0032] (2) Put the sol into a syringe with a nozzle aperture of 500 μm, feed at a rate of 5mL / h, voltage 20kV, solidify distance between the nozzle and the collector 10cm, fill with N 2 Spin under the above conditions until the pressure is 0.3MPa to obtain gel fibers, and dry at 70°C for 1 hour.

[0033] (3) Place the xerogel fiber obtained in step (2) in a calciner, raise the temperature from room temperature to 300°C at 0.5°C / min in the air, keep it for 1h, and then raise th...

Embodiment 2

[0034] Embodiment 2: Preparation of dynamic nickel cobalt lithium manganese oxide material

[0035] (1) According to the concentration of lithium hydroxide 9mol / L, nickel hydroxide 2mol / L, cobalt hydroxide 2mol / L, manganese hydroxide 2mol / L, prepare 100mL mixed aqueous solution, add tartaric acid, so that the concentration of tartaric acid in the system is 4mol / L , aged at 65°C for 9h until viscous and transparent, and continued to age at room temperature to a viscosity of 2.5Pa·S to obtain a sol precursor.

[0036] (2) Put the sol into a syringe with a nozzle diameter of 500 μm, feed at a rate of 7.5mL / h, and a voltage of 30kV. 2 Spin under the above conditions until the pressure is 0.4MPa to obtain gel fibers, and dry at 70°C for 1 hour.

[0037] (3) Put the xerogel fiber obtained in step (2) in a calciner, in the air, raise the temperature from room temperature to 350°C at 1°C / min, keep it for 2h, then raise the temperature to 700°C at 3°C / min, Keep for 9 hours to obtain ...

Embodiment 3

[0038] Embodiment 3: Preparation of dynamic nickel cobalt lithium manganese oxide material

[0039] (1) According to the concentration of lithium carbonate 18mol / L, nickel carbonate 3mol / L, cobalt carbonate 3mol / L, manganese carbonate 3mol / L, prepare 100mL mixed aqueous solution, add oxalic acid to make the organic acid concentration in the system 5mol / L, at 70 Aging at ℃ for 8h until viscous and transparent, and continuing aging at room temperature until the viscosity is 3Pa·S to obtain the sol precursor.

[0040] (2) Put the sol into a syringe with a nozzle aperture of 500 μm, feed at a rate of 10 mL / h, and a voltage of 30 kV. The curing distance between the nozzle and the collector is 30 cm, and fill with N 2 Spin under the above conditions until the pressure is 0.5MPa to obtain gel fibers, and dry at 70°C for 1 hour.

[0041] (3) Place the xerogel fiber obtained in step (2) in a calciner, in the air, raise the temperature from room temperature to 400°C at 1°C / min, keep it...

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Abstract

The invention belongs to the technical field of preparation of nickel cobalt manganese acid lithium materials, and discloses a power-type nickel cobalt manganese acid lithium material as well as a preparation method and application of the material. The preparation method comprises the following steps: adding organic acid into a mixed water solution of a lithium source, a nickel source, a cobalt source and a manganese source, aging so as to obtain a sol precursor, carrying out electrostatic spinning so as to obtain gel fibers, and forging so as to obtain the power-type nickel cobalt manganese acid lithium material. The nickel cobalt manganese acid lithium material of a nano fiber structure is obtained by a sol gel-electrostatic spinning method, is homogeneous in structural size, effectively reduces the surface energy, and intensifies the capacity of a lithium ion; the nano fiber structure can reduce the diffusion impedance of a lithium ion in the embedding and removing process, so that the lithium ion is dispersed rapidly; meanwhile, the material superficial area is relatively large; more reaction activity sites exist, and the relatively high specific capacity can be provided; According to the method provided by the invention, the process is simple, electrostatic spinning can be realized without adding polymer reagents, not only can the using cost of a polymer be reduced, but also the impact to a nano structure caused by the polymer can be alleviated.

Description

technical field [0001] The invention belongs to the technical field of preparation of nickel-cobalt-lithium-manganese-oxide cathode materials, in particular to a dynamic nickel-cobalt-lithium-manganese-oxide material and its preparation method and application Background technique [0002] The increasingly tense and deteriorating global energy and environmental conditions have strengthened people's consensus on the development of energy-saving and new energy-powered vehicles. my country has gradually introduced corresponding policies and measures to promote the progress of key technologies and promote the formation of the consumer market. The output of my country's power vehicles is rising. Power batteries are batteries used to provide power sources for new energy vehicles and other tools. The performance of the power battery determines the performance and endurance of the new energy vehicle, and the positive electrode material determines the specific capacity and cycle life...

Claims

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Application Information

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IPC IPC(8): H01M4/505H01M4/525
CPCH01M4/505H01M4/525H01M10/052C01G53/44C01P2004/03C01P2004/17C01P2006/40C04B35/62231C04B2235/3203C04B2235/3262C04B2235/3275C04B2235/3279C04B2235/44C04B2235/443C04B2235/449C04B2235/5264C04B2235/6562C04B2235/6567D01D5/003D01F1/10D01F9/10H01M4/131Y02E60/10D01D5/0007D01D10/02H01M4/0471H01M4/0483H01M4/1391H01M10/0525
Inventor 欧彦楠余海军李长东
Owner GUANGDONG BRUNP RECYCLING TECH
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