A kind of preparation method of chromium-titanium-based lithium-ion battery multi-level structure negative electrode material
A technology for lithium-ion batteries and negative electrode materials, applied in battery electrodes, structural parts, secondary batteries, etc., can solve the problems of fast capacity decay, poor rate performance, low electronic conductance and ion conductance, and achieve uniform and stable particles Effect of cycle life and particle size uniformity
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Embodiment 1
[0021] 0.1mol lithium carbonate and 0.1mol Al 2 o 3 Put it in a ball mill, mill it for 5 hours, then put it in a muffle furnace and bake it at 650°C for 10 hours. After cooling to room temperature, pass it through a fine sieve to obtain α-LiAlO 2 White powder( figure 1 ). Dissolve 0.06mol tetrabutyl titanate, 0.0501mol lithium nitrate and 0.07mol chromium nitrate in 550mL of ethanol and ethylene glycol mixed solution (volume ratio is 1:3), add organic acid (adipic acid and citric acid The mixture, the molar ratio is 1:1) is a chelating agent, wherein the molar ratio of organic acid to metal cation is 1.2:1, stirred in a constant temperature water bath at 80°C until a gel is formed, and then the gel is placed at room temperature for 12h , and then put the gel into a vacuum drying oven at 150°C for 24 hours to obtain a precursor; then 0.3165 grams of α-LiAlO 2 The powder is mixed with the precursor, the precursor is ball-milled for 4 hours, put into a muffle furnace and pret...
Embodiment 2
[0023] 0.1mol lithium carbonate and 0.1mol Al 2 o 3 Put it in a ball mill, mill it for 5 hours, then put it in a muffle furnace and bake it at 650°C for 10 hours. After cooling to room temperature, pass it through a fine sieve to obtain α-LiAlO 2 White powder. Dissolve 0.06mol of isopropyl titanate, 0.0502mol of lithium acetate and 0.07mol of chromium acetate in a mixed solution of 550mL of ethanol and ethylene glycol (volume ratio of 1:3), add organic acid (adipic acid and citric acid The mixture, the molar ratio is 1:1) is a chelating agent, wherein the molar ratio of organic acid to metal cation is 1:1, stirred in a constant temperature water bath at 70°C until a gel is formed, and then the gel is placed at room temperature for 10h , and then put the gel into a vacuum drying oven at 120°C for 24 hours to obtain a precursor; then 0.3165 grams of α-LiAlO 2 The powder is mixed with the precursor, the precursor is ball milled for 4 hours, put into a muffle furnace and pretre...
Embodiment 3
[0025] 0.1mol lithium carbonate and 0.1mol Al 2 o 3 Put it in a ball mill, mill it for 5 hours, then put it in a muffle furnace and bake it at 650°C for 10 hours. After cooling to room temperature, pass it through a fine sieve to obtain α-LiAlO 2 White powder. Dissolve 0.06mol tetrabutyl titanate, 0.0501 lithium hydroxide and 0.07mol chromium acetate in a mixed solution of 550mL ethanol and ethylene glycol (volume ratio is 1:3), add organic acid (adipic acid and citric acid The mixture, the molar ratio is 1:1) is a chelating agent, wherein the molar ratio of organic acid to metal cation is 1.8:1, stirred in a constant temperature water bath at 100°C until a gel is formed, and then the gel is placed at room temperature for 15h , and then put the gel into a vacuum drying oven at 180°C for 24 hours to obtain a precursor; then 0.3165 grams of α-LiAlO 2 The powder is mixed with the precursor, the precursor is ball milled for 4 hours, put into a muffle furnace and pretreated at 6...
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