Preparation method of porous carbon based electrothermal phase change composite

A composite phase change material and phase change material technology, which is applied in the field of preparation of porous carbon-based electrothermal composite phase change materials, can solve problems such as unfavorable packaging phase change core materials, hinder electron transmission, reduce electrical conductivity, etc., and achieve electrothermal conversion Excellent performance, good cycle stability, good conductivity

Active Publication Date: 2018-10-09
UNIV OF SCI & TECH BEIJING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The spatial discontinuity of these particles severely hinders the transport of electrons, thereby reducing the electrical conductivity
In addition, the pure carbon nanotu...

Method used

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  • Preparation method of porous carbon based electrothermal phase change composite
  • Preparation method of porous carbon based electrothermal phase change composite
  • Preparation method of porous carbon based electrothermal phase change composite

Examples

Experimental program
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Effect test

Embodiment example 1

[0023] (1) Preparation of carbon nanotubes through porous carbon support materials:

[0024] 2.91 g of cobalt nitrate hexahydrate and 3.28 g of dimethylimidazole were dispersed in 250 ml of methanol solvent. After stirring at room temperature for 24 h, the metal-organic framework ZIF-67 was obtained. 1.0 g of ZIF-67 was dispersed into 500 ml of a DMF solvent containing 3.36 g of zinc nitrate hexahydrate and 1.14 g of 2-aminoterephthalic acid. Stir at room temperature for 12 h, filter and wash with DMF three times, and dry at 80° C. for 24 h. The dried product was subjected to H 2 / Ar atmosphere at a rate of 2 °C / min to 1000 °C, and kept at this temperature for 8 hours, and then cooled to room temperature at a rate of 5 °C / min to obtain a porous carbon support material with carbon nanotubes interspersed.

[0025] (2) Preparation of composite phase change materials:

[0026] 0.25 g of the carbon nanotubes prepared above were evacuated through the porous carbon support materi...

Embodiment example 2

[0028] (1) Preparation of carbon nanotubes through porous carbon support materials:

[0029] 2.97 g of nickel nitrate hexahydrate and 3.28 g of dimethylimidazole were dispersed in 400 ml of methanol solvent. Stirring at 140°C for 24h gave the metal-organic framework Ni-ZIF. 1.0 g of Ni-ZIF was dispersed into 500 ml of DMF solvent containing 3.36 g of zinc nitrate hexahydrate and 1.14 g of 2-methylimidazole. Stir at room temperature for 12 h, filter and wash with DMF three times, and dry at 80° C. for 24 h. The dried product was subjected to H 2 / Ar atmosphere at a rate of 2 °C / min to 1000 °C, and kept at this temperature for 8 hours, and then cooled to room temperature at a rate of 5 °C / min to obtain a porous carbon support material with carbon nanotubes interspersed.

[0030] (2) Preparation of composite phase change materials:

[0031]0.30 g of the carbon nanotubes prepared above were evacuated through the porous carbon support material at 120° C. for 8 hours to complete...

Embodiment example 3

[0033] (1) Preparation of carbon nanotubes through porous carbon support materials:

[0034] Disperse 2.78g of ferrous sulfate heptahydrate and 3.28g of dimethylimidazole into 200ml of methanol solvent. After stirring at room temperature for 24 h, the metal-organic framework Fe-ZIF was obtained. 1.0 g of Fe-ZIF was dispersed into 500 ml of DMF solvent containing 3.36 g of zinc nitrate hexahydrate and 1.14 g of 2-methylimidazole. Stir at room temperature for 12 h, filter and wash with DMF three times, and dry at 80° C. for 24 h. The dried product was subjected to H 2 / Ar atmosphere at a rate of 2 °C / min to 1000 °C, and kept at this temperature for 8 hours, and then cooled to room temperature at a rate of 5 °C / min to obtain a porous carbon support material with carbon nanotubes interspersed.

[0035] (2) Preparation of composite phase change materials:

[0036] 0.20 g of the carbon nanotubes prepared above were evacuated through the porous carbon support material at 120° C. ...

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Abstract

The invention belongs to the field of nano composites and phase change composites, and particularly relates to a preparation method of a porous carbon based electrothermal phase change composite. According to the invention, with MOFs@MOFs as a template, a metal organic skeleton coats another metal organic skeleton containing catalytic metal elements (such as Co, Fe, Ni) by an in-situ synthesis method, three-dimensional carbon nanotubes penetrating through a porous carbon support are prepared by means of high-temperature calcination, and the phase change composite can be better matched a phasechange core material to be supported. The phase change composite effectively prevents the leakage problem, effectively overcomes the defect of low conductivity of an organic phase change material, hasthe advantages of high electrothermal conversion efficiency, high cycle stability and wide core material selection range, and thus has wide application prospects.

Description

technical field [0001] The invention belongs to the field of nanocomposite materials and composite phase change materials, and in particular relates to a preparation method of a porous carbon-based electrothermal composite phase change material. Background technique [0002] Due to the advantages of pollution-free, renewable, and controllable storage of electric energy, electrothermal conversion has attracted extensive attention in the field of phase change materials in recent years. Composite phase change materials can precisely control heat by adjusting voltage during the conversion process of electrical energy to thermal energy, and eliminate the imbalance of energy supply in time and space. At present, it has shown great potential in the integration of portable electronic devices and other power facilities. application prospects. At the same time, the combination of electrical energy and composite phase-change materials enables thermal energy to be output in a continuou...

Claims

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Application Information

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IPC IPC(8): C09K5/06C09K3/00
CPCC09K3/00C09K5/063
Inventor 王戈李昂董文钧董诚高鸿毅黄秀兵陈晓
Owner UNIV OF SCI & TECH BEIJING
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