Covalent organic framework material/carbon nanotube organic composite material and application thereof in lithium ion battery
A covalent organic framework and carbon nanotube technology, applied in battery electrodes, secondary batteries, circuits, etc., can solve the problems of low conductivity, high solubility, and difficult to dissolve, and achieve high specific capacity, low electrolyte solubility, Good reversible transmission effect
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Embodiment 1
[0033] (1) Weigh 16.5 mg of pyrazine-2,5-diamine, 21 mg of trialdehyde phloroglucinol and 21 mg of carbon nanotubes into a pyrex tube, add 1 mL of 1,4-dioxane and 1mL of mesitylene as a mixed solvent, then add 0.2mL of 6M acetic acid aqueous solution as a catalyst, ultrasonicate for 3 minutes, and then cycle through the liquid nitrogen freezing-thawing process 3 times, and place it in a dry box for heating reaction, wherein the liquid nitrogen freezing time 3min, thawing time is 5min.
[0034] (2) Subsequently, the substance obtained in step (1) was placed in a blast drying oven at 120° C. and heated for 72 hours. After the reaction was terminated, it was dried in a vacuum oven at 80°C for 12 hours to obtain the following figure 1 The composite organic material of the structure shown, the XRD of the material is as follows figure 1 As shown, it can be clearly seen that there is a strong peak at about 1° by PXRD test, which confirms that the composite organic material has a ...
Embodiment 2
[0039] The difference between this example and Example 1 is that in step (1) of this example, 16.5 mg of pyrazine-2,5-diamine, 21 mg of trialdehyde phloroglucinol and 5.5 mg of carbon nanotubes were weighed Put it into a pyrex tube, add 0.8mL of 1,4-dioxane and 1.2mL of mesitylene as a mixed solvent, and 0.6mL of 6M acetic acid aqueous solution as a catalyst, and the ultrasonic time is 5min; In the step (2), the reaction temperature is 100° C.; in the step (3) of this embodiment, the organic composite material weighed is 50 mg, the quality of Ketjen Black is 40 mg, and the PVDF weighed is 10 mg. Use the NMP solution of 0.3mL and the ethanol of 0.3mL as organic solvent; 2 .
[0040] Other steps in this embodiment are the same as in Embodiment 1, and will not be repeated here.
Embodiment 3
[0042] The difference between this example and Example 1 is that in step (1) of this example, 33 mg of pyrazine-2,5-diamine, 42 mg of trialdehyde phloroglucinol and 33 mg of carbon nanotubes were weighed and put into In the Pyrex tube, add 1mL of 1,4-dioxane and 3mL of mesitylene as a mixed solvent, in the step (2) of the present embodiment, the time of the vacuum oven is 24h; in the present embodiment In step (3), the organic composite material taken by weighing is 100mg, the quality of the carbon nanotubes taken is 1mg, the PVDF taken by weighing is 1mg, the organic solvent is 2.04mL ethylene glycol, and the grinding time is 10min; In the step (4) of the example, the coating method is drop coating, and the loading of the organic composite material is controlled to be 0.01 mg / cm 2 .
[0043] Other steps in this embodiment are the same as those in Embodiment 1, and will not be repeated here.
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Abstract
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