Preparation method of mg2si/siox/c composite negative electrode material membrane electrode for lithium ion secondary battery
A technology for secondary batteries and negative electrode materials, applied in battery electrodes, secondary batteries, electrode manufacturing, etc., to achieve the effects of convenient operation, strong reproducibility, and improved cycle performance
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Embodiment 1
[0026] Put the foamed magnesium in water and wash it under ultrasonic conditions for 10 minutes, take it out and dry it for later use. Dissolve sucrose in water under heating conditions to adjust the viscosity of the slurry to 3000Pa·s, add silicon dioxide after it is completely dissolved, the amount of silicon dioxide added is 10 times the mass of sucrose, and at the same time add water to adjust the slurry under the condition of constant stirring The viscosity is 7000Pa·s. After the adjustment, the slurry was stirred and dispersed for 4 hours, and the uniform slurry was coated on the treated foamed magnesium with a knife coater, and dried in a vacuum drying oven at 120° C. for 12 hours. The dried membrane precursor is rolled to 1 / 3 of the original thickness by a pair of rollers, and then put into a tube furnace for sintering under the protection of argon. Heat preservation for 2 hours, heat preservation at 650° C. for 12 hours, and naturally cool down to room temperature to...
Embodiment 2
[0029] Put the foamed magnesium in water and wash it under ultrasonic conditions for 10 minutes, take it out and dry it for later use. Dissolve glucose in water under heating conditions to adjust the viscosity of the slurry to 4000Pa·s, add silicon monoxide after complete dissolution, the amount of silicon monoxide added is 15 times the mass of glucose, and add water to adjust the slurry under the condition of constant stirring The viscosity is 6000Pa·s. After the adjustment, the slurry was stirred and dispersed for 3 hours, and the uniform slurry was coated on the treated foamed magnesium with a knife coater, and dried in a vacuum drying oven at 120°C for 12 hours. The dried membrane precursor is rolled to 1 / 4 of the original thickness by a pair of rollers, put into a tube furnace for sintering under the protection of argon, and the sintering system is 3°C / min. Heat preservation for 2 hours, heat preservation at 600° C. for 12 hours, and naturally cool down to room temperatu...
Embodiment 3
[0032]Put the foamed magnesium in water and wash it under ultrasonic conditions for 10 minutes, take it out and dry it for later use. Use ethanol to adjust the viscosity of the phenolic resin slurry to 3000Pa·s, and add silicon monoxide after it is completely dissolved. The amount of silicon monoxide added is 12 times the mass of the asphalt, and at the same time, add ethanol to adjust the viscosity of the slurry at 8000Pa·s under the condition of non-stop stirring. s. After the adjustment, the slurry was stirred and dispersed for 10 hours, and the uniform slurry was coated on the treated foamed magnesium with a knife coater, and dried in a vacuum drying oven at 120° C. for 12 hours. The dried membrane precursor was rolled to 1 / 3 of the original thickness by a pair of rollers, and then put into a tube furnace for sintering under the protection of argon. Heat preservation for 2 hours, heat preservation at 650° C. for 12 hours, and naturally cool down to room temperature to obt...
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