Carbon coating treatment method for copper-aluminum-silicon nano alloy material and application of carbon coating treatment method
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A processing method and alloy material technology, applied in the direction of electrical components, battery electrodes, circuits, etc., can solve the problems of low first-week efficiency, short cycle life, long charge and discharge time, etc., to meet coating requirements, reasonable particle size distribution, The unique effect of microstructure
Inactive Publication Date: 2018-02-23
산시우테하이머뉴매테리얼스테크놀러지컴퍼니리미티드
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[0004] At present, the negative electrode material of the existing lithium battery is nano-scale, and there is basically no stress relief step and process. The
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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. 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.
[0064] (2) Smelting of Cu-Al-Si alloy:
[0065] Select the technical ...
Embodiment 2
[0087] Example 2, the composition of the copper-aluminum-silicon alloy is in parts by weight: 27.5-32 parts of silicon, 58-63 parts of copper, 1-11 parts of aluminum, 0-5 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 provides a carbon coating treatment method for a copper-aluminum-silicon nano alloy material and an application of the carbon coating treatment method, belongs to the technical field ofpreparation of negative electrode materials for lithium batteries, and provides a carbon coating treatment method for treating a copper-aluminum-silicon nano alloy material and an application of the carbon coating treatment method to overcome the disadvantages of the prior art. According to the adopted technical scheme, the carbon coating treatment method is carried out through vacuum drying afterthe steps of burdening, smelting, milling, separating and screening, and comprises the steps of firstly preparing dried copper-aluminum-silicon alloy powder, a carbonaceous material and water at theratio in parts by weight of (80-100):(1-2):(8-11); stirring the raw materials evenly, putting the mixture into a vacuum heat treatment furnace, carrying out heat preservation at 600-800 for 2-4h and carrying out carbon coating treatment, wherein the vacuum degree is smaller than or equal to 0.02Pa; and finally carrying out furnace cooling to below 80 DEG C and drawing a charge. The copper-aluminum-silicon nano alloy is prepared from the following components in parts by weight: 22-70 parts of silicon, 20-70 parts of copper, 0.5-15 parts of aluminum and 0-5 parts of impurities; and the particlesizes are smaller than or equal to 80 microns. The carbon coating treatment method can be widely applied to the field of the negative electrode materials for the lithium batteries.
Description
technical field [0001] The invention discloses a carbon coating treatment method for copper-aluminum-silicon nano alloy material 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 materials, w...
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