Functionalized graphene composite fused salt

A graphene composite and functionalization technology, applied in the field of molten salt, can solve the problems of low melting point and low thermal conductivity of graphite-based molten salt composite materials, and achieve the effects of improving thermal stability, high heat storage density and wide application range.

Inactive Publication Date: 2015-12-02
刘义林
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  • Abstract
  • Description
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Problems solved by technology

[0005] Summarize the current problems of molten salts: (1) The overall performance of nitrates (including multi-component nitrates) is good, but the thermal conductivity is low; (2) There are some limitations in other composite molten salts, such as metal-b...

Method used

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  • Functionalized graphene composite fused salt

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Embodiment Construction

[0019] The present invention will be further described in detail below through examples.

[0020] Preparation of functionalized graphene composite molten salt:

[0021] Add 1 g of graphene oxide to 100 mL of deionized water for ultrasonic dispersion, and dropwise add an aqueous solution of 1.0 mol / L hydroxide. The hydroxide is a mixture of sodium hydroxide and lithium hydroxide, and the mass ratio of sodium hydroxide to lithium hydroxide is 100.0 : 10.0, and sodium-lithium graphene was obtained by separation after the reaction. The mixture composed of 44% sodium nitrate, 16% potassium nitrate, 33% sodium nitrite and 7% calcium nitrate was dried in an oven at 120°C, and after mechanical mixing, placed in a heater with an ultrasonic and stirring device, The temperature is raised until the molten salt is melted, and then functionalized graphene is added, and the mass ratio of functionalized graphene and molten salt is 20:100. Ultrasonic, stirring and mixing, and grinding to powd...

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Abstract

The invention provides a functionalized graphene composite fused salt which comprises functionalized graphene and a fused salt which are mixed in a certain mass ratio. The fused salt is a nitrate mixture, and the functionalized graphene is graphene oxide or metalized graphene oxide. Compared with other fused salts, such as nitrates, graphene-base fused salts and metal-base fused salts, the functionalized graphene composite fused salt has obviously improved properties, and has the advantages of high thermal conductivity, high heat storage density, favorable comprehensive properties, high recyclability and the like. When being used as a heat-transfer heat-storage material, the functionalized graphene composite fused salt is applicable to the technical fields of solar light, thermal power generation, solar hydrogen production and the like.

Description

technical field [0001] The invention belongs to the technical field of molten salt, and in particular relates to a functionalized graphene composite molten salt. Background technique [0002] Water, organic fluids, flue gas and air occupy 90% of the application fields of energy utilization and heat transfer, but their scope is limited in some fields due to their small heat transfer coefficient and low operating temperature. Molten salt can not only be used at high temperature (≥500℃), but also has good heat transfer and stability, and is widely used in chemical, petrochemical, solar cell and metallurgical industries. [0003] Molten salt heat storage materials mainly include carbonate, chloride, fluoride and nitrate. Carbonate has low price, low corrosiveness, high density and solubility, and high viscosity, but some carbonates have high temperature decomposition. Fluoride salts have high melting point and high latent heat, but large volume shrinkage in liquid-solid phase ...

Claims

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Application Information

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IPC IPC(8): C09K5/06
Inventor 刘义林黄国波项军伟
Owner 刘义林
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