Hybrid perovskite material with barocaloric effects and application thereof

A perovskite material and perovskite technology, applied in the direction of heat exchange materials, chemical instruments and methods, etc., can solve the problems of difficult composition control, poor water solubility, limited application, etc., to achieve expanded application prospects, easy composition, Good water solubility

Active Publication Date: 2017-12-01
HUAZHONG UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] Aiming at the above defects or improvement needs of the prior art, the present invention provides a hybrid perovskite material with pressure calorie effect and its application, thereby solving the problems of difficult composition control, high cost, poor water solubility and problems in the prior art. Application of limited technical issues

Method used

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  • Hybrid perovskite material with barocaloric effects and application thereof
  • Hybrid perovskite material with barocaloric effects and application thereof
  • Hybrid perovskite material with barocaloric effects and application thereof

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Embodiment 1

[0033] Embodiment 1 of the present invention provides a hybrid perovskite material [(CH 3 ) 2 NH 2 ][Mg(HCOO) 3 ], through high pressure differential thermal analysis equipment, DSC and variable temperature powder X-ray diffraction methods to study the structure and phase transition of materials, and to evaluate the calorie effect of materials through Maxwell's equations; to reveal the impact of the crystal structure of materials on calorie Effect; Preliminary evaluation of the cooling efficiency of the material in the device.

[0034] Use the hydrothermal method to design and synthesize the material. First, the weighed N'N dimethylformamide (DMF) and water (H 2 O) join in the beaker of 25ml, then weigh the magnesium chloride hexahydrate (MgCl 2 ·6H 2 O) Add it to the above solution for ultrasonication and stirring. After it is stirred evenly, add it to a 25ml polytetrafluoroethylene liner and seal it with an autoclave. React for 3 days in a constant temperature drying ov...

Embodiment 2

[0051] Hybrid perovskite materials [(CH 3 ) 2 NH 2 ][Mg(HCOO) 3 ] Applied to air conditioners, the hybrid perovskite is put into the compressor as a refrigerant, and the pressure is applied to the hybrid perovskite refrigerant through the piston, and the hybrid perovskite refrigerant becomes a high-temperature solid under pressure, and the hybrid After the perovskite refrigerant becomes a high-temperature solid, the compressor transfers the heat of the hybrid perovskite refrigerant to the condenser, so that the hybrid perovskite refrigerant releases excess heat and the temperature returns to the initial state, removing the pressure At this time, the temperature of the hybrid perovskite refrigerant drops sharply, and the hybrid perovskite refrigerant returns to its initial state to absorb the heat of the surrounding environment to reduce the air temperature, and achieve the purpose of refrigeration through continuous circulation.

Embodiment 3

[0053] Hybrid perovskite materials [(CH 3 ) 2 NH 2 ][Mg(HCOO) 3 ] applied to refrigerators, put the hybrid perovskite as a refrigerant into the compressor, apply pressure to the hybrid perovskite refrigerant through the piston, and the hybrid perovskite refrigerant becomes a high-temperature solid under pressure, and the hybrid After the perovskite refrigerant becomes a high-temperature solid, the compressor transfers the heat of the hybrid perovskite refrigerant to the condenser, so that the hybrid perovskite refrigerant releases excess heat and the temperature returns to the initial state, removing the pressure At this time, the temperature of the hybrid perovskite refrigerant drops sharply, and the hybrid perovskite refrigerant returns to the initial state to absorb the heat of the surrounding environment and reduce the air temperature. Through continuous circulation, the internal temperature of the refrigerator is reduced, thereby achieving the purpose of refrigeration. ...

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Abstract

The invention discloses a hybrid perovskite material with barocaloric effects and application thereof. The hybrid perovskite material with the barocaloric effects is in an ABX3 perovskite structure with the barocaloric effects, wherein A is ammonium cation, B is metal cation, and X is organic bridging ligand. With the barocaloric effects, the hybrid perovskite material achieve higher refrigerating efficiency compared with traditional refrigerating materials and can be applied to refrigeration equipment. Compared with traditional barocaloric materials, the hybrid perovskite materials with the barocaloric effects has the advantages of being simple in component regulation, low in cost, good in water solubility and the like and broadens the application prospect.

Description

technical field [0001] The invention belongs to the field of solid-state refrigeration, and more specifically relates to a hybrid perovskite material with pressure calorie effect and its application. Background technique [0002] Solid-state refrigeration technology has received more and more attention in recent decades, because it has broad application prospects in research fields such as domestic refrigeration equipment and devices. Especially for the pressure calorie effect (barocaloric effect) - through the application of hydrostatic pressure in the solid material to drive the phase change of the working substance, and then produce isothermal entropy change and adiabatic temperature change, it has caused a research boom, because it replaces the traditional use of toxic The refrigeration method of compressed gas has the advantages of high refrigeration efficiency and simple synthesis method, making it the first choice in the field of solid-state refrigeration technology. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K5/04
CPCC09K5/041
Inventor 李伟魏文娟陆培祥
Owner HUAZHONG UNIV OF SCI & TECH
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