Silicon-carbon composite assembled battery
A technology of silicon-carbon composite materials and combined batteries, applied in battery electrodes, secondary batteries, circuits, etc., can solve the problems of active material falling off, battery cycle stability decline, structural collapse, etc., to achieve improved conductivity and excellent cycle performance , low cost effect
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Embodiment 1
[0021] The specific preparation steps of the combined battery of silicon-carbon composite material in this embodiment are as follows:
[0022] (1) Add silicon powder to a NaOH solution containing various mixtures with a mass ratio of less than 30%, after ultrasonic vibration, filter and dry to remove surface impurities and oxides of silicon; wherein, the mixture is sugar compound, high polymer , silicon powder and organic solvent, the mass ratio of the above sugar compound, high polymer, silicon powder and organic solvent is 1:1:0.5:5~1:0.1:0.1:0.5;
[0023] (2) citric acid is dissolved in absolute ethanol to make a citric acid / ethanol solution with a concentration of 0.4g / ml; the silicon powder processed in step 1 is added to the citric acid / ethanol solution in an amount of 2g / ml , After ultrasonic stirring for 30 minutes, the mixed solution was sprayed and cracked in the air at 400°C to obtain this product.
[0024] The high polymer in step (1) is selected from polyacrylami...
Embodiment 2
[0030] The specific preparation steps of the combined battery of silicon-carbon composite material in this embodiment are as follows:
[0031] (1) Add silicon powder to a NaOH solution containing various mixtures with a mass ratio of less than 30%, after ultrasonic vibration, filter and dry to remove surface impurities and oxides of silicon; wherein, the mixture is sugar compound, high polymer , silicon powder and organic solvent, the mass ratio of the above sugar compound, high polymer, silicon powder and organic solvent is 1:1:0.5:5~1:0.1:0.1:0.5;
[0032] (2) citric acid is dissolved in absolute ethanol to make a citric acid / ethanol solution with a concentration of 0.4g / ml; the silicon powder processed in step 1 is added to the citric acid / ethanol solution in an amount of 2g / ml , After ultrasonic stirring for 30 minutes, the mixed solution was sprayed and cracked in the air at 400°C to obtain this product.
[0033] The high polymer in step (1) is selected from polyacrylami...
Embodiment 3
[0039] The specific preparation steps of the combined battery of silicon-carbon composite material in this embodiment are as follows:
[0040] (1) Add silicon powder to a NaOH solution containing various mixtures with a mass ratio of less than 30%, after ultrasonic vibration, filter and dry to remove surface impurities and oxides of silicon; wherein, the mixture is sugar compound, polymer , silicon powder and organic solvent, the mass ratio of the above sugar compound, high polymer, silicon powder and organic solvent is 1:1:0.5:5~1:0.1:0.1:0.5;
[0041] (2) citric acid is dissolved in absolute ethanol to make a citric acid / ethanol solution with a concentration of 0.4g / ml; the silicon powder processed in step 1 is added to the citric acid / ethanol solution in an amount of 2g / ml , After ultrasonic stirring for 30 minutes, the mixed solution was sprayed and cracked in the air at 400°C to obtain this product.
[0042] The carbohydrate compound in step (1) is selected from monosacc...
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Abstract
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