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Copper-aluminum-silicon alloy nanometer negative electrode material of lithium battery and preparation method of negative electrode material

A negative electrode material, silicon alloy technology, applied in the direction of battery electrodes, nanotechnology for materials and surface science, nanotechnology, etc., can solve the problems of short cycle life, low first-week efficiency, long charge and discharge time, etc., to achieve particle size Reasonable distribution, meeting coating requirements, unique effect of microstructure

Inactive Publication Date: 2018-02-23
산시우테하이머뉴매테리얼스테크놀러지컴퍼니리미티드
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] At present, the existing technology has the main problems when using silicon as the negative electrode material: short cycle life, low efficiency in the first week and long charge and discharge time

Method used

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  • Copper-aluminum-silicon alloy nanometer negative electrode material of lithium battery and preparation method of negative electrode material
  • Copper-aluminum-silicon alloy nanometer negative electrode material of lithium battery and preparation method of negative electrode material
  • Copper-aluminum-silicon alloy nanometer negative electrode material of lithium battery and preparation method of negative electrode material

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Embodiment 1

[0037] Embodiment 1, a copper-aluminum-silicon alloy nano negative electrode material for a lithium battery, consists of the following raw materials in parts by weight: 37-42 parts of silicon, 55-62 parts of copper, 4-15 parts of aluminum, and 0-3 parts of impurities. The alloy nano-anode material described as a whole includes: pores, shrinkage cavities, shrinkage porosity, dislocations, vacancies and cavities with a multi-defect organizational structure, and the particle size is ≤ 80 μm.

[0038] The present embodiment is prepared according to the following steps:

[0039] (1) Ingredients of Cu-Al-Si alloy:

[0040]Cut pure copper into φ50mm×100mm rods, pre-treat with pickling and vacuum drying before use, and control the drying temperature at 110±5°C; cut pure aluminum into 50mm×50mm×30mm small aluminum plates, and use acid before use Washing plus vacuum drying pretreatment, the drying temperature is controlled at 200±5°C; the block size of metal silicon is controlled at 5-...

Embodiment 2

[0059] Embodiment 2: a copper-aluminum-silicon alloy nano negative electrode material for a lithium battery, consisting of the following raw materials in parts by weight: 37 parts of silicon, 55 parts of copper, 4 parts of aluminum, and 0.5 part of impurities; its preparation method is as follows:

[0060] (1) Ingredients of Cu-Al-Si alloy:

[0061] Cut pure copper into φ50mm×100mm rods, pre-treat with pickling and vacuum drying before use, and control the drying temperature at 110±5°C; cut pure aluminum into 50mm×50mm×30mm small aluminum plates, and use acid before use Washing plus vacuum drying pretreatment, the drying temperature is controlled at 200±5°C; the block size of metal silicon is controlled at 5-30mm, pickling before use to remove surface impurities, and then vacuum drying, the drying temperature is controlled at 180± 5°C. The total weight of ingredients is 20Kg, including 37 parts of silicon, 55 parts of copper, 4 parts of aluminum, and 0.5 parts of impurities (...

Embodiment 3

[0074] Embodiment 3: a copper-aluminum-silicon alloy nano negative electrode material for a lithium battery, consisting of the following raw materials in parts by weight: 42 parts of silicon, 62 parts of copper, 15 parts of aluminum, and 3 parts of impurities; its preparation method is as follows:

[0075] (1) Ingredients of Cu-Al-Si alloy:

[0076] Cut pure copper into φ50mm×100mm rods, pre-treat with pickling and vacuum drying before use, and control the drying temperature at 110±5°C; cut pure aluminum into 50mm×50mm×30mm small aluminum plates, and use acid before use Washing plus vacuum drying pretreatment, the drying temperature is controlled at 200±5°C; the block size of metal silicon is controlled at 5-30mm, pickling before use to remove surface impurities, and then vacuum drying, the drying temperature is controlled at 180± 5°C. The total weight of ingredients is 20Kg, including: 42 parts of silicon, 62 parts of copper, 15 parts of aluminum, and 3 parts of impurities (...

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Abstract

The invention discloses a copper-aluminum-silicon alloy nanometer negative electrode material of a lithium battery and a preparation method of the negative electrode material, and belongs to the technical field of the negative electrode material of the lithium battery. According to the copper-aluminum-silicon alloy nanometer negative electrode material of the lithium battery and the preparation method of the negative electrode material provided by the invention, a technical scheme is adopted as follows: the copper-aluminum-silicon alloy nanometer negative electrode material of the lithium battery comprises the following raw materials in parts by weight: 37-42 parts of silicon, 55-62 parts of copper, 4-15 parts of aluminum and 0-3 parts of impurities; and the overall alloy nanomaterial comprises a multi-defect organization structure of air pores, shrinkage holes, shrinkage porosity, dislocation, vacancy and holes, and the grain diameter is less than or equal to 80[mu]m. The invention can be applied to the technical field of the negative electrode material of the lithium battery.

Description

technical field [0001] The invention discloses a copper-aluminum-silicon alloy nanometer negative electrode material for a lithium battery and a preparation method thereof, belonging to the technical field of lithium battery negative electrode materials. Background technique [0002] New materials and clean energy are both key development directions at the national level. Lithium-ion batteries are currently the most widely used energy storage cells in energy storage technology. Improving the energy storage density of cells is the goal pursued by the world. The energy density of cells is The improvement mainly depends on the development and progress of its positive and negative electrode materials, but it is also related to the progress of the positive and negative electrode current collectors, positive and negative electrode binders, electrolytes and separators of lithium-ion batteries. [0003] The core part of the lithium-ion battery is the positive and negative electrode ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/36H01M4/38H01M4/46H01M4/62H01M10/0525B82Y30/00
CPCB82Y30/00H01M4/364H01M4/386H01M4/463H01M4/626H01M4/628H01M10/0525Y02E60/10
Inventor 王宥宏刘忆恩
Owner 산시우테하이머뉴매테리얼스테크놀러지컴퍼니리미티드
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