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Copper-aluminium-silicon alloy nano negative electrode material of lithium battery and preparation method thereof

A negative electrode material, silicon alloy technology, applied in battery electrodes, nanotechnology for materials and surface science, nanotechnology, etc., can solve the problems of long charge and discharge time, short cycle life, and low efficiency in the first week

Inactive Publication Date: 2018-03-09
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-aluminium-silicon alloy nano negative electrode material of lithium battery and preparation method thereof
  • Copper-aluminium-silicon alloy nano negative electrode material of lithium battery and preparation method thereof
  • Copper-aluminium-silicon alloy nano negative electrode material of lithium battery and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] Embodiment 1, a copper-aluminum-silicon alloy nano-electrode material for a lithium battery, which is composed of the following raw materials in parts by weight: 22-27.5 parts of silicon, 60-70 parts of copper, 0.5-5 parts of aluminum, and 0-5 parts of impurities;

[0038] The alloy nano material as a whole contains: multi-defect structure of pores, shrinkage cavities, shrinkage porosity, dislocations, vacancies and cavities

[0039] Structure, particle size≤80μm.

[0040] This example was prepared according to the following steps:

[0041] (1) The ingredients of Cu-Al-Si alloy:

[0042] Cut pure copper into φ50mm×100mm rods, pretreated with pickling and vacuum drying before use, and the drying temperature is controlled at 110±5℃; cut pure aluminum into 50mm×50mm×30mm small aluminum plates, use acid before use Washing plus vacuum drying pretreatment, the drying temperature is controlled at 200±5℃; the lumpiness of metal silicon is controlled at 5~30mm, pickling to remove surface...

Embodiment 2

[0061] Example 2: A copper-aluminum-silicon alloy nano-electrode material for a lithium battery, consisting of the following raw materials in parts by weight: 22 parts by weight of silicon, 60 parts by copper, 0.5 parts by aluminum, and 0.5 parts by impurities; the preparation method is as follows:

[0062] (1) The ingredients of Cu-Al-Si alloy:

[0063] Cut pure copper into φ50mm×100mm rods, pretreated with pickling and vacuum drying before use, and the drying temperature is controlled at 110±5℃; cut pure aluminum into 50mm×50mm×30mm small aluminum plates, use acid before use Washing plus vacuum drying pretreatment, the drying temperature is controlled at 200±5℃; the lumpiness of metal silicon is controlled at 5~30mm, pickling to remove surface impurities before use, and then vacuum drying, the drying temperature is controlled at 180± 5°C. The total weight of the ingredients is 20Kg, 22 parts of silicon, 60 parts of copper, 0.5 parts of aluminum, and 0.5 parts of impurities (incl...

Embodiment 3

[0076] Embodiment 3: A copper-aluminum-silicon alloy nano-electrode material for a lithium battery, which is composed of the following raw materials in parts by weight: 22-27.5 parts of silicon, 60-70 parts of copper, 0.5-5 parts of aluminum, and 0-5 parts of impurities;

[0077] It is composed of the following raw materials by weight: 27.5 parts of silicon, 70 parts of copper, 5 parts of aluminum, and 5 parts of impurities; the preparation method is as follows:

[0078] (1) The ingredients of Cu-Al-Si alloy:

[0079] Cut pure copper into φ50mm×100mm rods, pretreated with pickling and vacuum drying before use, and the drying temperature is controlled at 110±5℃; cut pure aluminum into 50mm×50mm×30mm small aluminum plates, use acid before use Washing plus vacuum drying pretreatment, the drying temperature is controlled at 200±5℃; the lumpiness of metal silicon is controlled at 5~30mm, pickling to remove surface impurities before use, and then vacuum drying, the drying temperature is co...

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Abstract

The invention discloses a copper-aluminium-silicon alloy nano negative electrode material of a lithium battery and a preparation method thereof, and belongs to the technical field of lithium battery negative electrode materials. The used technical solution is as follows: the copper-aluminium-silicon alloy nano negative electrode material of the lithium battery is formed by the following raw materials by weight: 22-27.5 parts of silicon, 60-70 parts of copper, 0.5-5 parts of aluminium, and 0-5 parts of impurities; and the alloy nano material contains multi-defect tissue structures of pore, contraction cavity, shrinkage porosity, dislocation, vacancy and cavity, and the particle size is less than or equal to 80 um. The copper-aluminium-silicon alloy nano negative electrode material can be applied to the technical field of the lithium battery negative electrode materials.

Description

Technical field [0001] The invention relates to a copper-aluminum-silicon alloy nano-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 batteries in energy storage technology. Improving the energy storage density of batteries is the goal pursued by the world. The improvement mainly depends on the development and progress of its positive and negative materials, but it is also related to the progress of materials such as the positive and negative electrode current collectors, the 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 materials, which directly deter...

Claims

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Application Information

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IPC IPC(8): C22C9/10B22F9/08B22F1/00H01M4/38H01M10/0525B82Y30/00
CPCB22F1/0003B22F9/082B22F2009/0848B82Y30/00C22C9/10H01M4/386H01M10/0525Y02E60/10
Inventor 王宥宏刘忆恩
Owner 산시우테하이머뉴매테리얼스테크놀러지컴퍼니리미티드
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