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A kind of composite phase change material and its preparation method and application
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A technology of composite phase change material and mixed liquid, which is applied in the field of preparation of composite phase change material for thermal management in a full temperature range, can solve the problems of inability to realize cooling and heating at the same time, achieves improved electrical/thermal conductivity, simple preparation method, low cost effect
Active Publication Date: 2022-07-19
WUHAN INSTITUTE OF TECHNOLOGY
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[0005] In view of this, the present invention provides a composite phase change material and its preparation method and application to solve the problem that existing lithiumbattery thermal management materials cannot simultaneously realize cooling and heating functions
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[0034] To solve the above problems, combine figure 1 As shown, the embodiment of the present invention provides a preparation method of a composite phase change material, comprising the following steps:
[0037] S3, vacuum immersing the aerogel carrier in the lauric acid LA melt, then taking out the aerogel carrier, heating to remove the unadsorbed lauric acid, that is, to obtain saturated loaded lauric acid@MOF-based carbide / graphene aerogel Glue LA@MOF-C / ...
Embodiment 1
[0053] The present embodiment provides a preparation method of a composite phase change material, comprising the following steps:
[0054] 1) Weigh 1mmol ferricchloride hexahydrate and 0.66mmol trimesic acid and add to 20mL deionized water and stir magnetically for 10min at room temperature, dissolve completely to obtain orange-yellow clear liquid; The gained mixture solution is placed in 50mL polytetrafluoroethylene In the lined reaction kettle, heated at 120°C for 72h for hydrothermal reaction, an orange-yellow solid precipitate can be obtained; the solid precipitate was treated in a nitrogenatmosphere at 500°C for 1h to obtain black MOF-C powder;
[0055] 2) Weigh GO to prepare 5 mL of aqueous dispersions of different concentrations, add 10 mg MOF-C powder and 20 μL EDA, heat at 180 °C for 12 h for hydrothermal synthesis, and freeze-dry to obtain MOF-C / GO hybrid aerogels carrier;
[0056] 3) Weigh a certain amount of lauric acid and place it in a beaker, heat it to compl...
Embodiment 2
[0066] This embodiment provides a method for optimizing the structure of a composite phase change material, and the difference from Embodiment 1 is:
[0067] In step 2), GO was weighed to prepare 5mL of aqueous dispersions of different concentrations, and 20mg MOF-C powder and 20μLEDA were added;
[0068] The remaining steps and parameters are the same as in Example 1.
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technical field [0001] The invention relates to the technical field of lithiumbattery thermal management, in particular to a preparation method and application of a composite phase change material for thermal management in a full temperature range. Background technique [0002] Lithium batteries can maintain a high-performance operating temperature between 20 °C and 45 °C. Low temperature environment will cause the conductivity of the electrolyte to decrease and increase resistance, and high temperature environment will lead to a decrease in energy storage or even explosion. There have been studies trying to change the battery material itself to improve the high / low temperature resistance of the battery, but no commercial electrode or electrolyte has been developed so far. The vigorous development of new energy electric vehicles has prompted people to develop a thermal management material with a full temperature range so that the battery can work efficiently in high or low ...
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