Porous graphite base phase change energy storage composite material and its preparing method

A technology of porous graphite and composite materials, applied in heat exchange materials, chemical instruments and methods, etc., can solve the problems affecting the efficiency of energy storage and energy release, low energy storage and low energy storage of composite materials, etc.

Inactive Publication Date: 2005-03-02
TONGJI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] (1) Poor thermal conductivity: As the thermal conductivity of the currently used matrix materials is generally small, the thermal conductivity and heat transfer performance of the phase change energy storage composite material during the phase change process is ver

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0018] Example 1

[0019] Take 30 grams of flake graphite with a fineness of 80 mesh and a carbon content of 90%, 300 grams of sulfuric acid with a concentration of 98%, and 20 grams of potassium permanganate, and put them into a glass container and mix them with stirring. The glass container was then placed in a constant temperature water bath, and the temperature of the water bath was set to 45°C. The mixture was continuously stirred, and the stirring RPM was set at 300. After intercalation, a washing procedure is carried out. Filter the mixture with a 200-mesh stainless steel mesh, and then put the filtered residue into a beaker, add clear water to cover the mixture, stir thoroughly with a glass rod, and then filter with a 200-mesh stainless steel mesh. Repeat the cleaning twice. Measure the pH value of the last stirring solution to 2. Put the last filtered residue in a glass tray, and then put it in an oven for drying. The oven temperature is 60°C, and the drying time is 10 ho...

Example Embodiment

[0020] Example 2

[0021] Take 30 grams of flake graphite with a fineness of 50 mesh and a carbon content of 94%, 300 grams of sulfuric acid with a concentration of 98%, and 20 grams of potassium permanganate, and put them in a glass container and mix them with stirring. The glass container was then placed in a constant temperature water bath, and the temperature of the water bath was set to 45°C. The mixture was continuously stirred, and the stirring RPM was set at 300. After intercalation, a washing procedure is carried out. Filter the mixture with a 200-mesh stainless steel mesh, and then put the filtered residue into a beaker, add clear water to cover the mixture, stir thoroughly with a glass rod, and then filter with a 200-mesh stainless steel mesh. Repeat the cleaning 3 times. Measure the pH value of the last stirring solution to 4. Put the last filtered residue in a glass tray, and then put it in an oven for drying. The oven temperature is 60°C, and the drying time is 10 ho...

Example Embodiment

[0022] Example 3

[0023] Take 30 grams of flake graphite with a fineness of 80 mesh and a carbon content of 90%, 300 grams of sulfuric acid with a concentration of 98%, and 20 grams of potassium permanganate, and put them into a glass container and mix them with stirring. Then the glass container was placed in a constant temperature water bath, and the temperature of the water bath was set to 60°C. The mixture was continuously stirred, and the stirring RPM was set at 300. After intercalation, a washing procedure is carried out. Filter the mixture with a 200-mesh stainless steel mesh, and then put the filtered residue into a beaker, add clear water to cover the mixture, stir thoroughly with a glass rod, and then filter with a 200-mesh stainless steel mesh. Repeat the cleaning 4 times. Measure the pH value of the last stirring solution to 6. Put the last filtered residue in a glass tray, and then put it in an oven for drying. The oven temperature is 60°C, and the drying time is 10 ...

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PUM

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Abstract

The present invention relates to one kind of composite porous graphite base phase change energy-storing material and its preparation process. The composite phase change energy-storing material has porous graphite as base material and is prepared through soaking organic phase change material. The porous graphite is prepared with natural flake graphite and through intercalation, swelling and compression. The organic phase change material is crystallized fatty acid, alkane, ester or their mixture. Compared with available composite phase change energy-storing material, the composite porous graphite base phase change energy-storing material has the advantages of high heat conducting efficiency, great energy storing amount, etc. The present invention can promote the application of phase change energy-storing material in various application fields.

Description

technical field [0001] The invention belongs to the field of energy storage composite materials, and in particular relates to a porous graphite-based phase-change energy storage composite material and a preparation method thereof. Background technique [0002] Storing energy to meet energy demand at other times or places is of great value in eliminating the uncoordinated contradiction between energy supply and demand, improving energy efficiency and utilizing renewable energy. Utilizing the characteristics of energy absorption and energy release during the phase transition process of matter to realize energy storage and utilization is one of the active directions in many fields such as energy, materials, aerospace, textiles, electric power, medical instruments, and construction in recent years. Phase change energy storage has the advantages of high energy storage density, easy control of energy storage temperature and a wide range of options. At present, it has entered the s...

Claims

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Application Information

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IPC IPC(8): C09K5/02
Inventor 张东
Owner TONGJI UNIV
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