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Novel energy storage material for improving heat and mass transfer efficiency

A technology of energy storage materials and phase change materials, which is applied in the field of phase change energy storage, can solve the problems of large decrease in latent heat of phase change, low heat and mass transfer efficiency of energy storage materials, and affecting the thermal conductivity of phase change materials.

Active Publication Date: 2021-05-11
山西万家暖节能科技有限公司
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  • Summary
  • Abstract
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  • Application Information

AI Technical Summary

Problems solved by technology

At the high temperature, polyimide is easily thermally degraded, which leads to some defects in the three-dimensional graphene network constructed in advance, which affects the improvement of the thermal conductivity of the phase change material. At the same time, due to the mass fraction of graphene and the distribution of airgel pores and other factors, resulting in a greater decrease in the latent heat of phase change relative to pure paraffin
The above situation leads to low heat and mass transfer efficiency of energy storage materials

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] (1) Modification of graphene oxide: 200mg graphene oxide (Beijing Deke Daojin Technology Co., Ltd., synthesized by the Hummers method) was mixed with 100mL deionized water, and ultrasonic 2h was formed to form a uniform graphene oxide dispersion; Under stirring conditions, mix absolute ethanol-toluene (volume ratio 1:1) containing 400 mg of silane coupling agent γ-phthalimidopropyltrimethoxysilane (CAS: 154717-09-6) The solution was added dropwise into the graphene oxide dispersion; after the dropwise addition, the pH was adjusted to 5.0 with acetic acid. Then react at 70° C. for 24 h, cool to room temperature, centrifuge, and wash the precipitate three times with absolute ethanol and deionized water to remove unreacted silane coupling agent. Vacuum drying to obtain modified graphene oxide powder.

[0028] FT-IR spectra showed that the modified graphene oxide powder increased by 2960 cm compared with unmodified graphene oxide -1 (CH 3 ), 2890cm -1 (CH 2 ), 1740cm ...

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PUM

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Abstract

According to the energy storage material, graphene aerogel is used as a carrier, and paraffin is used as a phase change material. The graphene aerogel is prepared from graphene oxide through chemical reduction self-assembly and freeze drying. The graphene oxide is selected from imide functionalized modified graphene oxide. Compared with the prior art, the heat and mass transfer efficiency of the novel energy storage material is improved.

Description

technical field [0001] The invention belongs to the technical field of phase change energy storage and relates to a new energy storage material for improving heat and mass transfer efficiency. Background technique [0002] With the development of the global economy and the increasing demand for energy, the problem of energy depletion has gradually become prominent. The problem of environmental pollution caused by traditional fossil energy is becoming more and more serious, and the development and utilization of new energy has gradually become the focus of research in various countries. Among various new energy sources, solar energy has the advantages of cleanness, pollution-free and sustainable. However, my country has a vast territory, especially in the vast western and northern regions, which has relatively rich solar energy resources and has considerable development potential. [0003] However, due to factors such as weather, geography, and sunlight time, solar energy h...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K5/06C09K5/14
CPCC09K5/063C09K5/14
Inventor 魏晶刘东赵凯何新平赵新顺石繁槐薛建勋张天航
Owner 山西万家暖节能科技有限公司