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

A negative electrode material, silicon alloy technology, applied in the direction of battery electrodes, circuits, electrical components, etc., can solve the problems of low efficiency in the first week, long charge and discharge time, and short cycle life

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

Examples

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Effect test

Embodiment 1

[0036] Example 1, a copper-aluminum-silicon alloy nano-electrode material for a lithium battery, composed of the following raw materials in parts by weight: 50 to 70 parts of silicon, 20 to 40 parts of copper, 0.5 to 10 parts of aluminum, and 0 to 5 parts of impurities. The alloy nanometer negative electrode material as a whole contains: a multi-defect structure of pores, shrinkage cavities, shrinkage porosity, dislocations, vacancies and cavities, with a particle size ≤ 80 μm.

[0037] This example was prepared according to the following steps:

[0038] (1) The ingredients of Cu-Al-Si alloy:

[0039] 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 remo...

Embodiment 2

[0058] Example 2: A copper-aluminum-silicon alloy nano-electrode material for a lithium battery, consisting of the following raw materials in parts by weight: 50 parts by weight of silicon, 20 parts by copper, 5 parts by aluminum, and 0.5 parts by impurities; the preparation method is as follows:

[0059] (1) The ingredients of Cu-Al-Si alloy:

[0060] 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, including: silicon: 50 parts, copper 20 parts, aluminum 5 parts, impurities (including: titanium, c...

Embodiment 3

[0073] Embodiment 3: A copper-aluminum-silicon alloy nano-electrode material for a lithium battery, which is composed of the following raw materials by weight: 70 parts by weight of silicon, 40 parts by copper, 8 parts by aluminum, and 5 parts by impurities; the preparation method is as follows:

[0074] (1) The ingredients of Cu-Al-Si alloy:

[0075] 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, including: 46 parts of silicon, 58 parts of copper, 15 parts of aluminum, and 3 parts of impurities ...

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Abstract

The invention relates to a copper-aluminum-silicon alloy nanometer negative electrode material of a lithium battery and a preparation method of the copper-aluminum-silicon alloy nanometer negative electrode material, and belongs to the technical field of a lithium battery negative electrode material. The invention provides a high-performance copper-aluminum-silicon alloy nanometer negative electrode material of the lithium battery and the preparation method of the copper-aluminum-silicon alloy nanometer negative electrode material. The copper-aluminum-silicon alloy nanometer negative electrodematerial of the lithium battery comprises the following raw materials based on parts by weight: 50-70 parts of silicon, 20-40 parts of copper, 0.5-10 parts of aluminum and 0-5 parts of impurity, thealloy nanometer material integratedly comprises a multi-defect tissue structure of air holes, shrinkage holes, shrinkage porosity, dislocation, vacancies and holes, and the grain size is smaller thanor equal to 80 micrometers. The copper-aluminum-silicon alloy nanometer negative electrode material can be applied to the technical field of the lithium battery negative electrode material.

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): H01M4/36H01M4/38H01M4/46H01M4/62
CPCH01M4/364H01M4/386H01M4/463H01M4/625Y02E60/10
Inventor 王宥宏刘忆恩
Owner 산시우테하이머뉴매테리얼스테크놀러지컴퍼니리미티드
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