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Preparation method of high-nickel ternary NCM622-nanowire material

A nanowire, high-nickel technology, applied in the field of nanomaterials and electrochemistry, to achieve high discharge specific capacity, high yield, and excellent performance

Inactive Publication Date: 2017-12-05
广东迈纳科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, NCM622-nanowire materials have not been reported

Method used

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  • Preparation method of high-nickel ternary NCM622-nanowire material
  • Preparation method of high-nickel ternary NCM622-nanowire material
  • Preparation method of high-nickel ternary NCM622-nanowire material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] The preparation method of high-nickel ternary NCM622-nanometer wire material comprises the steps:

[0036] 1) Add 10.5 mmol of lithium acetate, 6 mmol of nickel acetate, 2 mmol of cobalt acetate and 2 mmol of manganese acetate into 40.0 mL of absolute ethanol, stir magnetically at 40 °C for 1 h to dissolve them all, and form a uniform and transparent solution;

[0037] 2) Weigh 3.8 g of polyvinylpyrrolidone (molecular weight: 1,300,000) and add it to the solution obtained in step 1), and stir magnetically for 8 h to dissolve it completely;

[0038] 3) Weigh 0.5 g of glucose and add it to the solution obtained in step 2), and stir magnetically for 1 h to dissolve it completely;

[0039] 4) The solution obtained in step 3) was dissolved in 0.3 ml h -1 The speed is transferred to the syringe, electrospinning is carried out under the conditions of positive high voltage 14.5 kV and negative high voltage 1.5 kV, and aluminum foil is used to receive nanofibers;

[0040] 5) ...

Embodiment 2

[0048] The preparation method of high-nickel ternary NCM622-nanometer wire material, it comprises the steps:

[0049] 1) Add 10.7 mmol of lithium acetate, 6 mmol of nickel acetate, 2 mmol of cobalt acetate and 2 mmol of manganese acetate into 40.0 mL of absolute ethanol, stir magnetically at 40 °C for 1 h to dissolve them all, and form a uniform and transparent solution;

[0050] 2) Weigh 4.0 g of polyvinylpyrrolidone (molecular weight: 1,300,000) and add it to the solution obtained in step 1), and stir magnetically for 11 h to dissolve it completely;

[0051] 3) Weigh 0.4 g of fructose and add it to the solution obtained in step 2), and stir magnetically for 0.5 h to dissolve it completely;

[0052] 4) The solution obtained in step 3) was dissolved in 0.3 ml h -1 The speed is transferred to the syringe, electrospinning is carried out under the conditions of positive high voltage 15.0 kV and negative high voltage 2.5 kV, and aluminum foil is used to receive nanofibers;

[0...

Embodiment 3

[0057] 1) Add 10.2 mmol of lithium acetate, 6 mmol of nickel acetate, 2 mmol of cobalt acetate and 2 mmol of manganese acetate into 40.0 mL of absolute ethanol, stir magnetically at 40 °C for 2 h to dissolve them all, and form a uniform and transparent solution;

[0058] 2) Weigh 3.9 g of polyvinylpyrrolidone (molecular weight: 1,300,000) and add it to the solution obtained in step 1), and stir magnetically for 12 h to dissolve it completely;

[0059] 3) Weigh 0.8 g of glucose and add it to the solution obtained in step 2), and stir magnetically for 1 h to dissolve it completely;

[0060] 4) The solution obtained in step 3) was dissolved in 0.3 ml h -1 The speed is transferred to the syringe, electrospinning is carried out under the conditions of positive high voltage 15.0 kV and negative high voltage 2.5 kV, and aluminum foil is used to receive nanofibers;

[0061] 5) The product obtained in step 4) was placed in a muffle furnace for pre-sintering, and the temperature was s...

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Abstract

The invention discloses a preparation method of a high-nickel ternary NCM622-nanowire material. The method comprises the following steps: weighing certain amounts of a lithium source, a nickel source, a cobalt source and a manganese source according to a certain element mole ratio, adding the weighed sources into ethanol in order to a uniform and transparent solution; weighing a certain amount of polyvinylpyrrolidone, adding the polyvinylpyrrolidone into the above solution, and magnetically stirring the polyvinylpyrrolidone and the solution to completely dissolve the polyvinylpyrrolidone; weighing a certain amount of organic sugar used as a water absorption inhibitor into the above solution, and continuously stirring the organic sugar and the solution to completely dissolve the organic sugar; transferring the obtained solution into a syringe, carrying out electrostatic spinning, and receiving nano-fibers by aluminum foil; sintering the above obtained product in air; and carrying out high temperature calcination on the sintered product in an argon atmosphere to obtain the high-nickel ternary NCM622-nanowire material. The finally obtained product is made of nanowires formed by interconnecting LiNi0.6Co0.2Mn0.2O2 particles, has a high specific capacity and a good structure stability as alithium ion battery positive electrode active material, and improves the cycle stability and the rate performances of the lithium ion battery positive electrode active material.

Description

technical field [0001] The invention relates to the technical field of nanometer materials and electrochemistry, in particular to a method for preparing a high-nickel ternary NCM622-nanometer wire material, which can be used as a positive electrode active material of a lithium ion battery. Background technique [0002] In recent years, with the development of new energy sources and the promotion of smart grid systems, the energy storage system has higher and higher requirements for the construction of new energy infrastructure, especially for energy storage systems for power devices, such as new energy electric vehicle power Battery. Among the current various energy storage technologies, rechargeable batteries are favored by people due to their long service life and good economic benefits, such as traditional lead-acid batteries, nickel-cadmium batteries and nickel-metal hydride batteries. However, each conventional battery has shortcomings and limitations, making it diffic...

Claims

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Application Information

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IPC IPC(8): H01M4/505H01M4/525H01M10/0525B82Y30/00B82Y40/00
CPCB82Y30/00B82Y40/00H01M4/505H01M4/525H01M10/0525Y02E60/10
Inventor 何亮吴黎明安琴友周亮王选朋罗显德刘桥
Owner 广东迈纳科技有限公司
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