High thermal conductivity shape-stabilized phase change composite material and preparation method thereof

A composite material and shape-fixed phase change technology, applied in the direction of heat exchange materials, chemical instruments and methods, etc., can solve the problems of mechanical properties such as compression resistance that are rarely reported, achieve good compression resistance, improve thermal conductivity, and enhance mechanical properties performance effect

Inactive Publication Date: 2017-07-28
SHANXI INST OF COAL CHEM CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, as the most promising material in the field of thermal management such as power batteries, the research on the mechanical properties of shape-fixed phase change materials o

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0029] Example 1

[0030] Choose a density of 1.13g / cm 3 The coal tar is the precursor of carbon material:

[0031] (1) The expanded graphite with an expansion ratio of 150ml / g is molded into a density of 0.10g / cm 3 Of expanded graphite preforms;

[0032] (2) Immerse the expanded graphite preform into coal tar, and take it out after vacuum impregnation at -0.09MPa for 60 minutes and pressure impregnation at 0.8MPa for 60 minutes;

[0033] (3) At a heating rate of 3°C / min to 1000°C, the expanded graphite adsorbed with coal tar is carbonized at this temperature for 30 minutes to obtain an expanded graphite / porous carbon material composite;

[0034] (4) Using the vacuum impregnation method, immerse the expanded graphite / porous carbon material composite in paraffin wax with a melting point of 51.4°C at -0.09MPa, and vacuum impregnate for 1.5 hours to obtain a high thermal conductivity and shape-setting phase change material. Expanded graphite: porous carbon material: phase change material ...

Example Embodiment

[0035] Example 2

[0036] Choose a density of 1.13g / cm 3 The coal tar is the precursor of carbon material:

[0037] (1) The expanded graphite with an expansion ratio of 150ml / g is molded into a density of 0.15g / cm 3 Of expanded graphite preforms;

[0038] (2) Immerse the expanded graphite preform into coal tar, and take it out under -0.09MPa vacuum impregnation for 75min and 1.2MPa impregnation for 60min;

[0039] (3) Raise the temperature at 3°C / min to 800°C and 10°C / min to 2500°C, heat the expanded graphite adsorbed with coal tar at this temperature for 30 minutes to obtain an expanded graphite / porous carbon material composite;

[0040] (4) Using the vacuum impregnation method, immerse the expanded graphite / porous carbon material composite into paraffin wax with a melting point of 51.4°C at -0.09MPa, and vacuum impregnate for 2 hours to obtain a high thermal conductivity and shape-setting phase change material. Expanded graphite: porous carbon material: phase change material is 12.1%...

Example Embodiment

[0041] Example 3

[0042] Choose a density of 1.21g / cm 3 The mesophase coal pitch is the precursor of carbon material:

[0043] (1) The expanded graphite with an expansion ratio of 150ml / g is molded into a density of 0.16g / cm 3 Of expanded graphite preforms;

[0044] (2) After placing the mesophase coal tar pitch in quinoline for 3.5 hours to obtain a mesophase coal pitch quinoline soluble solution, immerse the expanded graphite preform into the mesophase coal pitch quinoline soluble solution, -0.09 Take out after 60min vacuum impregnation under MPa and 60min pressure impregnation under 0.9MPa;

[0045] (3) Heat the expanded graphite adsorbed with coal tar at this temperature at a heating rate of 2°C / min to 650°C and 5°C / min to 2000°C for 30 minutes to obtain an expanded graphite / porous carbon material composite;

[0046] (4) Using the vacuum impregnation method, the expanded graphite / porous carbon material composite was immersed in paraffin with a melting point of 39°C at -0.09MPa, an...

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Abstract

The invention discloses a high thermal conductivity shape-stabilized phase change composite material which comprises the following components: 6.7-54.0wt% of expanded graphite, 5.3-38.6wt% of a porous carbon material and 28.4-81.9wt% of an organic phase change substance. The composite material disclosed by the invention has the advantages of excellent thermal conductivity, high mechanical property and high phase-change latent heat.

Description

technical field [0001] The invention belongs to the technical field of phase change materials, and in particular relates to a high thermal conductivity shape-changing composite material and a preparation method thereof. Background technique [0002] New energy vehicles represented by pure electric vehicles are gradually getting rid of dependence on fossil fuels and becoming the mainstream direction of automobile development. The power of electric vehicles is mainly derived from power batteries. Lithium-ion power batteries have occupied the main market of power batteries due to their advantages in specific energy, specific power, service life and working voltage. Lithium-ion batteries can only ensure good charge and discharge efficiency, reliability and lifespan if they work at a suitable temperature. A reasonable and effective thermal management system is required to ensure that the power battery is in a suitable temperature range. At present, the power battery thermal mana...

Claims

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Application Information

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IPC IPC(8): C09K5/06
CPCC09K5/063
Inventor 王宏宝陶则超赵文光刘占军郭全贵
Owner SHANXI INST OF COAL CHEM CHINESE ACAD OF SCI
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