A kind of composite electrode material and its preparation method and application
A composite electrode and energy storage device technology, applied in the field of composite materials, can solve problems such as reducing the performance of capacitors, achieve good mechanical stability, increase energy storage active sites, and increase the specific capacity of electrodes
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[0033] see Figure 1 to Figure 12 . The present invention firstly provides a preparation method of a composite electrode material, said method comprising the steps of S1 to S4:
[0034] —S1: form a chitosan solution;
[0035] —S2: vacuumizing the melamine sponge after fully soaking it in the chitosan solution to obtain a chitosan-impregnated melamine sponge;
[0036] —S3: freeze-drying the melamine sponge impregnated with chitosan to obtain the precursor of the composite electrode material;
[0037] —S4: heat-treating the precursor of the composite electrode material under an oxygen-free condition to obtain the composite electrode material.
[0038] In step S1, the chitosan solution can be dissolved chitosan in acetic acid, the dissolution can be carried out under stirring conditions, and the chitosan can be 80-95% deacetylated chitosan Sugar, in some embodiments, described chitosan can be the chitosan that Adamas reagent company produces, and the volume concentration of d...
Embodiment 1
[0054] Pipette 3mL of glacial acetic acid into 297mL of deionized water, heat to 40°C, add 1.5g of chitosan several times under magnetic stirring, and stir until completely dissolved to obtain a chitosan solution with a mass fraction of about 0.5%. The melamine sponge is cut into sponge blocks of uniform size (length, width and height are about 5cm), immersed in a beaker filled with a mass fraction of 0.5% chitosan solution, then the beaker is transferred to a vacuum drying oven, and the vacuum pump is turned on. Continuous pumping at -0.1MPa for 30 minutes to fully impregnate the sponge with the solution. Take out the impregnated sponge, put it into a freezer for freezing, and then transfer it to a freeze-drying box for freeze-drying.
[0055] The freeze-dried sponge was put into a quartz tube furnace, and under the protection of nitrogen, the temperature was raised to 800°C at a heating rate of 10°C / min for 2 hours, and then cooled to room temperature to obtain a composite e...
Embodiment 2
[0061] Pipette 3 mL of glacial acetic acid and add it to 297 mL of deionized water, heat to 40 ° C, add 3 g of chitosan several times under magnetic stirring, and stir until the chitosan is completely dissolved to obtain a chitosan solution with a mass fraction of about 1%. The melamine sponge is cut into sponge pieces of uniform size (length, width and height are about 5cm), immersed in a beaker with a mass fraction of 1% chitosan solution, then the beaker is transferred to a vacuum drying oven, and the vacuum pump is turned on at - Continuous pumping at 0.1MPa for 30 minutes to fully impregnate the sponge with the solution. Take out the impregnated sponge, put it into a freezer for freezing, and then transfer it to a freeze-drying box for freeze-drying.
[0062] The freeze-dried sponge was put into a quartz tube furnace, and under the protection of nitrogen, the temperature was raised to 800°C at a heating rate of 10°C / min for 2 hours, and then cooled to room temperature to ...
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