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Method for preparing copper-aluminum-silicon alloy powder by using ultrasonic gas atomization and application of method

A silicon alloy, gas atomization technology, applied in electrical components, electrochemical generators, battery electrodes, etc., can solve the problems of long charging and discharging time, short cycle life, low efficiency in the first cycle, etc., to achieve reasonable particle size distribution, satisfying Coating requirements, unique effect of microstructure

Inactive Publication Date: 2018-02-27
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 using ultrasonic gas atomization and application of method
  • Method for preparing copper-aluminum-silicon alloy powder by using ultrasonic gas atomization and application of method
  • Method for preparing copper-aluminum-silicon alloy powder by using ultrasonic gas atomization and application of method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0062] (1) Ingredients of Cu-Al-Si alloy,

[0063] 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. Among them, in parts 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.

[0064] (2) Smelting of Cu-Al-Si alloy:

[0065] Select the technical parameters of the intermediat...

Embodiment 2

[0087] Example 2, the composition of the copper-aluminum-silicon alloy is in parts by weight: 27.5 to 32 parts of silicon, 58 to 63 parts of copper, 1 to 11 parts of aluminum, 0 to 5 parts of impurities, molten copper- The furnace temperature of aluminum-silicon alloy is 1550 ± 50 ℃, other steps and methods are basically similar to embodiment 1, Figure 6-10 Shown, the performance of the final product of this embodiment and embodiment 1 is basically the same.

Embodiment 3

[0088] 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 impurities, molten copper- The outgoing temperature of aluminum-silicon alloy is 1650 ± 50 ℃, other steps and methods are basically similar to embodiment 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 discloses a method for preparing copper-aluminum-silicon alloy powder by using ultrasonic gas atomization and application of the method, and belongs to the technical field of preparationof anode materials for lithium batteries. The method provides a copper-aluminum-silicon alloy anode nanomaterial for preparing the high-performance lithium batteries by using an ultrasonic gas atomization method and application of the method. According to the technical scheme, the method comprises the following steps that firstly, a tundish system of an atomization device is started, and the inner diameter of a tundish discharging spout is phi 6-14 mm; secondly, the tapping temperature of a copper-aluminum-silicon alloy in a molten state is adjusted to be 1300-1700 DEG C; and thirdly, liquidmetal is poured into a tundish, the flow rate of supersonic airflow is adjusted to be 2-2.5 mach. the pulse frequency of the supersonic airflow is 80-100 KHz, airflow pressure is 10-50 Mpa, and powdermaking through ultrasonic gas atomization is conducted. The method for preparing the copper-aluminum-silicon alloy powder by using ultrasonic gas atomization can be widely applied to the field of preparation of the anode materials for the lithium batteries.

Description

technical field [0001] The invention discloses a method for preparing copper-aluminum-silicon alloy powder by ultrasonic gas atomization and its application, belonging 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 mate...

Claims

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Application Information

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IPC IPC(8): B22F9/08H01M4/38H01M4/134H01M10/0525
CPCB22F9/082H01M4/134H01M4/38H01M4/386H01M10/0525Y02E60/10
Inventor 王宥宏刘忆恩
Owner 산시우테하이머뉴매테리얼스테크놀러지컴퍼니리미티드
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