Method for preparing copper-aluminum-silicon alloy powder by water atomization and application of method

A silicon alloy, water atomization technology, applied in nanotechnology for materials and surface science, electrochemical generators, electrical components, etc., can solve the problems of long charging and discharging time, short cycle life, low first cycle efficiency, etc.

Active 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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  • Method for preparing copper-aluminum-silicon alloy powder by water atomization and application of method
  • Method for preparing copper-aluminum-silicon alloy powder by water atomization and application of method
  • Method for preparing copper-aluminum-silicon alloy powder by water atomization and application of method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0061] (1) Ingredients of Cu-Al-Si alloy,

[0062] 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, of which by weight: 22-27.5 parts of silicon, 60-70 parts of copper, 0.5-10 parts of aluminum, 0-5 parts of impurities, impurities include: titanium, cobalt, nickel, manganese, iron, boron , phosphorus, carbon, etc., first add part of the silicon, then add copper and aluminum, then add the remaining silicon, and start heating.

[0063] (2) Smelting of Cu-Al-Si alloy:

[0064] Select the technical ...

Embodiment 2

[0083] Example 2, the composition of the copper-aluminum-silicon alloy is by weight: 27.5-32 parts of silicon, 58-63 parts of copper, 1-11 parts of aluminum, 0-5 parts of other impurities, molten copper - the temperature of the aluminum-silicon alloy is 1550±50°C, other steps and methods are basically similar to those in Example 1, Figure 6-10 Shown, the performance of the final product of this embodiment and embodiment 1 is basically the same.

Embodiment 3

[0084] Example 3, the composition of the copper-aluminum-silicon alloy is by weight: 32-39 parts of silicon, 54-59 parts of copper, 1-8 parts of aluminum, 0-5 parts of other impurities, molten copper - the temperature of the aluminum-silicon alloy is 1650±50°C, other steps and methods are basically similar to those in Example 1, Figure 11-20 Shown, the performance of the final product of this embodiment and embodiment 1 is basically the same.

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Abstract

The invention relates to a method for preparing copper-aluminum-silicon alloy powder by water atomization and application of the method, and belongs to the technical field of preparation of a lithiumbattery negative electrode material. The invention provides a high-performance lithium battery copper-aluminum-silicon alloy nanometer negative electrode material prepared by employing a water atomization method and application of the copper-aluminum-silicon alloy nanometer negative electrode material. The method comprises the steps of 1, starting a tundish system of an atomization system, whereinthe inner diameter of a tundish nozzle selects 6-14 millimeters; 2, adjusting a tapping temperature of molten-state copper-aluminum-silicon alloy to be 1,300-1,700 DEG C; and 3, pouring liquid-statemetal to a tundish, adjusting water atomization pressure to be 300-450Mpa, and performing water atomization powder preparation, wherein the copper-aluminum-silicon alloy comprises the constituents based on parts by weight: 22-70 parts of silicon, 20-70 parts of copper, 0.5-15 parts of aluminum and 0-5 parts of other impurity. The method can be widely applied to the field of preparation of the lithium battery negative electrode material.

Description

technical field [0001] The invention discloses a method for preparing copper-aluminum-silicon alloy powder by water atomization and its application, and belongs to the technical field of lithium battery negative electrode material preparation. 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 materials, ...

Claims

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Application Information

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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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