Copper-aluminum-silicon alloy nanometer negative electrode material of lithium battery and preparation method of negative electrode material
A negative electrode material, silicon alloy technology, applied in battery electrodes, nanotechnology for materials and surface science, nanotechnology, etc., can solve poor cycle life and cycle efficiency, poor volume change cycle life, and small specific capacity development potential and other problems to achieve the effect of meeting coating requirements, reasonable particle size distribution, and unique microstructure
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Example Embodiment
[0036] Embodiment 1, a copper-aluminum-silicon alloy nano-negative electrode material for a lithium battery is composed of the following raw materials in parts by weight: 27.5-32 parts of silicon, 58-63 parts of copper, 9-11 parts of aluminum, and 0-5 parts of impurities; The alloy nano-negative electrode material as a whole comprises: a multi-defect structure of pores, shrinkage cavities, shrinkage porosity, dislocations, vacancies and holes, and the particle size is less than or equal to 80 μm.
[0037] This example is prepared according to the following steps:
[0038] (1) Ingredients of Cu-Al-Si alloy:
[0039]Cut pure copper into φ50mm×100mm rods, pre-process with pickling and vacuum drying before use, and control the drying temperature at 110±5℃; cut pure aluminum into 50mm×50mm×30mm small aluminum plates, and use acid Washing and vacuum drying pretreatment, the drying temperature is controlled at 200±5℃; the block size of metal silicon is controlled at 5-30mm, pickling...
Example Embodiment
[0059] Embodiment 2: a copper-aluminum-silicon alloy nano-negative electrode material for a lithium battery, consisting of the following raw materials in parts by weight: 27.5 parts of silicon, 58 parts of copper, 9 parts of aluminum, and 0.5 parts of impurities; its preparation method is as follows:
[0060] (1) Ingredients of Cu-Al-Si alloy:
[0061] Cut pure copper into φ50mm×100mm rods, pre-process with pickling and vacuum drying before use, and control the drying temperature at 110±5℃; cut pure aluminum into 50mm×50mm×30mm small aluminum plates, and use acid Washing and vacuum drying pretreatment, the drying temperature is controlled at 200±5℃; 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±30mm 5°C. The total weight of ingredients is 20Kg, 27.5 parts of silicon, 58 parts of copper, 9 parts of aluminum, and 0.5 parts of impurities (including: ti...
Example Embodiment
[0074] Embodiment 3: a copper-aluminum-silicon alloy nano-negative electrode material for a lithium battery, consisting of the following raw materials in parts by weight: 32 parts of silicon, 63 parts of copper, 11 parts of aluminum, and 5 parts of impurities; its preparation method is as follows:
[0075] (1) Ingredients of Cu-Al-Si alloy:
[0076]Cut pure copper into φ50mm×100mm rods, pre-process with pickling and vacuum drying before use, and control the drying temperature at 110±5℃; cut pure aluminum into 50mm×50mm×30mm small aluminum plates, and use acid Washing and vacuum drying pretreatment, the drying temperature is controlled at 200±5℃; 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±30mm 5°C. The total weight of ingredients is 20Kg, 32 parts of silicon, 63 parts of copper, 11 parts of aluminum, and 5 parts of impurities (including: titanium,...
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