(LiNO3-KNO3-KNO2-Ca(NO3)2) quaternary nitric acid eutectic salt and application thereof

A technology of eutectic salt and nitric acid, applied in electrical components, delayed action cells, electrochemical generators, etc., can solve the problems of low temperature limit of liquid water, difficulty in meeting heat transfer requirements, expensive heat transfer medium, etc., to achieve Solve the problem of instability, the effect of wide working temperature range and low melting point

Inactive Publication Date: 2013-12-11
SHANGHAI INST OF MICROSYSTEM & INFORMATION TECH CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the use temperature limit of liquid water is low (less than 100°C), and the heat capacity of water vapor is very small, which is difficult to meet the requirements of a large amount of heat transfer; organic oil has a very low freezing point (less ...

Method used

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  • (LiNO3-KNO3-KNO2-Ca(NO3)2) quaternary nitric acid eutectic salt and application thereof
  • (LiNO3-KNO3-KNO2-Ca(NO3)2) quaternary nitric acid eutectic salt and application thereof
  • (LiNO3-KNO3-KNO2-Ca(NO3)2) quaternary nitric acid eutectic salt and application thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0054] A kind of quaternary nitric acid eutectic salt, the component that it comprises and component mass percent are as follows: LiNO 3 , 15%; KNO 3 , 10%; KNO 2 , 60%; Ca(NO 3 ) 2 , 15%.

[0055] The raw materials used include LiNO 3 , KNO 3 , KNO 2 and Ca(NO 3 ) 2 4H 2 O, raw material purity>99%. Weigh 0.75g LiNO 3 , 0.5g KNO 3 , 3.0g KNO 2 and 1.08g Ca(NO 3 ) 2 4H 2 O, measure 100ml of deionized water; pour the weighed components into deionized water, stir evenly and ultrasonically dissolve; heat the mixed solution to 100°C for distillation; put the solute left over from distillation into high temperature In the furnace, melt at 300°C for 16 hours, then cool to room temperature with the furnace; grind the cooled solid into powder, sieve, and then seal and store to obtain the required quaternary nitric acid eutectic salt.

[0056] Using STA449F3DSC / DTA-TG synchronous thermal analyzer, the DTA-TG test was performed on the quaternary nitric acid eutectic salt...

Embodiment 2

[0058] A kind of quaternary nitric acid eutectic salt, the component that it comprises and component mass percent are as follows: LiNO 3 , 20%; KNO 3 , 15%; KNO 2 , 50%; Ca(NO 3 ) 2 , 15%. Refer to Example 1 for the specific preparation method.

[0059] Using STA449F3DSC / DTA-TG synchronous thermal analyzer, the DTA-TG test was performed on the quaternary nitric acid eutectic salt prepared in this example at a heating rate of 10K / min. The DTA-TG curve obtained from the test is as follows figure 2 shown. The test results show that the exothermic peak start point of the quaternary nitric acid eutectic salt is around 92.5°C (that is, the melting point of the molten salt), and the peak value is 100.8°C; the start point of the thermogravimetric weight loss is around 546°C. Therefore, the working range of the molten salt is 92.5-546°C.

Embodiment 3

[0061] A kind of quaternary nitric acid eutectic salt, the component that it comprises and component mass percent are as follows: LiNO 3 , 25%; KNO 3 , 20%; KNO 2 , 40%; Ca(NO 3 ) 2 , 15%. Refer to Example 1 for the specific preparation method.

[0062] Using STA449F3DSC / DTA-TG synchronous thermal analyzer, the DTA-TG test was performed on the quaternary nitric acid eutectic salt prepared in this example at a heating rate of 10K / min. The DTA-TG curve obtained from the test is as follows image 3 shown. The test results show that the exothermic peak start point of the quaternary nitric acid eutectic salt is around 102.5°C (that is, the melting point of the molten salt), and the peak value is 107°C; the start point of the thermogravimetric weight loss is around 550°C. Therefore, the working range of the molten salt is 102.5-550°C.

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Abstract

The invention discloses a (LiNO3-KNO3-KNO2-Ca(NO3)2) quaternary nitric acid eutectic salt and relates to application of the eutectic salt. The quaternary nitric acid eutectic salt comprises the following components by mass: 10-70% of LiNO3, 1-55% of KNO3, 10-80% of KNO2 and 1-27.3% of Ca(NO3)2. The quaternary nitric acid eutectic salt with low melting point and high thermal stable temperature, provided by the invention, can be normally used at the temperature of 125-500 DEG C, can be used as not only an electrolyte material of a molten salt of a high-energy battery, especially a high-temperature lithium battery, but also a heat transfer medium material, and can be used for improving the limitation of the temperature tolerance limit to the Rankine cycle total efficiency.

Description

technical field [0001] The invention relates to a quaternary nitric acid eutectic salt, which is mainly oriented to the application in the technical fields of electrolyte materials for high-energy batteries such as thermal batteries, high-temperature lithium batteries, and lithium-ion batteries, and heat transfer medium materials. Background technique [0002] At room temperature, molten salt generally exists in a solid state, which cannot flow or conduct electricity; when the temperature is higher than the melting point of the molten salt, the molten salt not only has a certain degree of electrical conductivity, but also has a certain degree of thermal conductivity and fluidity. . Therefore, molten salt is mainly used in the field of thermal battery electrolyte and heat transfer medium at present. [0003] The thermal battery is a primary battery that uses solid molten salt as the electrolyte and uses an internal heat source to make the battery temperature reach the predet...

Claims

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Application Information

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IPC IPC(8): H01M10/39H01M6/36
CPCY02E60/10
Inventor 牛永强杜俊霖吴铸许小鸥
Owner SHANGHAI INST OF MICROSYSTEM & INFORMATION TECH CHINESE ACAD OF SCI
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