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Nickel-catalyzed nano-magnesium negative electrode material for magnesium-lithium double-salt battery and preparation method of negative electrode material

A negative electrode material and nickel catalysis technology, which is applied in the field of nickel catalyzed nano-magnesium negative electrode material and preparation, can solve the problems of restricting the development of magnesium-lithium double-salt batteries and reducing the kinetic process of battery charge and discharge, so as to improve the activity and ion diffusion kinetics. properties, improved kinetic properties, increased activity effects

Inactive Publication Date: 2019-06-14
SHAANXI UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, as the negative electrode material, the surface of metallic magnesium is easily passivated during charge and discharge, and the formed passivation film severely limits the ability of Mg during charge and discharge. 2+ The dissolution / deposition process of ions reduces the charging and discharging kinetics of the battery and limits the development of magnesium-lithium double-salt batteries

Method used

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  • Nickel-catalyzed nano-magnesium negative electrode material for magnesium-lithium double-salt battery and preparation method of negative electrode material

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Embodiment 1

[0034] A method for preparing a nickel-catalyzed nano-magnesium negative electrode for a magnesium-lithium double-salt battery, comprising the following steps;

[0035] Step 1, preparation of Mg-Ni nano alloy particles:

[0036] 1) 1g anhydrous MgCl 2 and 0.08g NiCl 2 Add it into 160ml of tetrahydrofuran (THF), and stir the mixed solution on a magnetic stirrer at 60°C for 1h to obtain a small amount of sky blue solution; add 4g of naphthalene and 0.2g of lithium flakes to 40ml of THF, and stir vigorously on a magnetic stirrer for 2h to obtain Dark green (black) naphthyl lithium solution.

[0037] 2) MgCl 2 and NiCl 2 The mixed solution was added dropwise to the naphthyllithium solution and stirred for 24h. 1) and 2) are both completed in an ultra-purified glove box, and the water and oxygen content in the modified environment are both ≤0.1PPM;

[0038] 3) The product is subjected to centrifugation at a speed of 12,000. Wash three times with THF after centrifugation.

...

Embodiment 2

[0049] A method for preparing a negative electrode material for a magnesium-lithium double-salt battery, comprising the following steps;

[0050] Step 1, preparation of Mg-Ni nano alloy particles:

[0051] 1) 1.52g anhydrous MgCl 2 and 0.0932g NiCl 2 Add it to 160ml of tetrahydrofuran (THF), and stir the mixed solution on a magnetic stirrer at 65°C for 1h to obtain a small amount of sky blue solution; add 4.3g of naphthalene and 0.235g of lithium flakes to 40ml of THF, and stir vigorously on a magnetic stirrer for 2h. A dark green (black) naphthyllithium solution was obtained.

[0052] 2) MgCl 2 and NiCl 2 The mixed solution was added dropwise to the naphthyllithium solution and stirred for 24h. 1) and 2) are both completed in an ultra-purified glove box, and the water and oxygen content in the modified environment are both ≤0.1PPM;

[0053]3) The product is subjected to centrifugation at a speed of 12,000. Wash three times with THF after centrifugation.

[0054] 4) Th...

Embodiment 3

[0064] A method for preparing a negative electrode material for a magnesium-lithium double-salt battery, comprising the following steps;

[0065] Step 1, preparation of Mg-Ni nano alloy particles:

[0066] 1) 2g anhydrous MgCl 2 and 0.1g NiCl 2 Add it into 160ml of tetrahydrofuran (THF), and stir the mixed solution on a magnetic stirrer at 70°C for 1h to obtain a small amount of sky blue solution; add 5g of naphthalene and 0.3g of lithium flakes to 40ml of THF, and stir vigorously on a magnetic stirrer for 2h to obtain Dark green (black) naphthyl lithium solution.

[0067] 2) MgCl 2 and NiCl 2 The mixed solution was added dropwise to the naphthyllithium solution and stirred for 24h. 1) and 2) are both completed in an ultra-purified glove box, and the water and oxygen content in the modified environment are both ≤0.1PPM;

[0068] 3) The product is subjected to centrifugation at a speed of 12,000. Wash three times with THF after centrifugation.

[0069] 4) The samples af...

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Abstract

The invention relates to a nickel-catalyzed nano-magnesium negative electrode material for a magnesium-lithium double-salt battery and a preparation method of the negative electrode material; the negative electrode material comprises Ni@Mg nano-alloy particles, Super P and a PVDF binder, wherein the Ni@Mg nano-alloy particles account for 80-90wt%; the mass ratio of Mg to Mg: Ni is 9:1; and the Mg-Ni nano-alloy particles, the Super P and the PVDF binder are combined by adopting a grinding mode. The preparation method comprises the following steps of preparing nickel-catalyzed nano-magnesium, preparing a negative electrode material mixed slurry, carrying out coating of the mixed slurry, carrying out drying on a coated thin film, and carrying out tabletting on the dried thin film to obtain the nickel-catalyzed nano-magnesium negative electrode material. By adoption of the method, relatively high energy density and excellent cycle and rate performance are maintained, while surface passivation can be suppressed by means of reducing the sizes of the negative electrode material particles and introducing high-activity Ni nano-particles, so that the electrode material activity and the ion diffusion dynamic property are improved.

Description

technical field [0001] The invention relates to the technical field of secondary power battery materials, in particular to a nickel-catalyzed nano-magnesium negative electrode material for a magnesium-lithium double-salt battery and a preparation method thereof. Background technique [0002] With the increasing use of fossil fuels, the depletion of fossil energy is inevitable. In the future, the main energy supply mode of mankind will transition from fossil energy to renewable energy. Various energy storage technologies have been developed in order to efficiently collect and safely store energy from sustainable renewable energy and to incorporate renewable energy into large-scale energy storage systems. Among different energy storage technologies, secondary batteries have become the most promising energy storage devices due to their advantages such as high energy conversion efficiency, long service life, simple maintenance, and low equipment cost. [0003] Among the many s...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/46H01M4/62H01M4/1395H01M4/04H01M10/0525H01M10/054B82Y30/00
CPCY02E60/10
Inventor 侯小江石洪昌杨艳玲王嘉栋王祎冯雷叶晓慧锁国权张荔朱建锋
Owner SHAANXI UNIV OF SCI & TECH
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