Thermal battery electrolyte with low melting point and high electric conductivity and preparation method thereof

A technology with low melting point and electrolyte, applied in the direction of delayed action cells, etc., can solve the problems of unsuitable electrolyte, high eutectic point, low conductivity, etc., and achieve the effect of reducing polarization, low eutectic point and high conductivity

Inactive Publication Date: 2012-05-02
GUIZHOU MEILING POWER SUPPLY CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] The technical problem to be solved by the present invention: the existing battery electrolyte has the disadvantages of relatively high eutectic point and low electrical conductivity. The present invention provides a hot battery electrolyte with Features of low melting point and high conductivity

Method used

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Examples

Experimental program
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Effect test

Embodiment 1

[0025] A battery electrolyte with a low melting point and high electrical and thermal conductivity of the present invention consists of the following components by weight percentage:

[0026] Analytical pure LiBr 31.48%

[0027] Analytical pure KBr 20.28%

[0028] Analytical CsBr 38.11%

[0029] Analytical pure LiI 10.13%.

[0030] A method for preparing a battery electrolyte with a low melting point and high electrical and thermal conductivity according to the present invention: 100-mesh LiBr, KBr, CsBr and LiI are respectively placed in a crucible, put into a muffle furnace and sintered at 200°C to 210°C for 6 hours, Cool, pass through a 100-mesh sieve, and then mix LiBr, KBr, CsBr and LiI according to the above-mentioned component ratio, put it into a ball mill jar, and carry out ball mill mixing for 5 hours, take it out, put it into a crucible, and put it into a muffle After sintering in the furnace under the protection of inert gas and nitrogen at 300°C to 320°C for 6 ...

Embodiment 2

[0032] A battery electrolyte with low melting point and high electrical and thermal conductivity of the present invention consists of the following components by weight percentage:

[0033] Analytical pure LiBr 31.48%

[0034] Analytical pure KBr 10.65%

[0035] Analytical pure CsBr 49.24%

[0036] Analytical pure LiI 8.63%.

[0037] A method for preparing a battery electrolyte with a low melting point and high electrical and thermal conductivity according to the present invention: put 100 meshes of LiBr, KBr, CsBr and LiI into a crucible respectively, put them into a muffle furnace and sinter at 180-200°C for 8 hours, and cool , through a 100-mesh sieve, and then mix LiBr, KBr, CsBr and LiI according to the above-mentioned component ratio, put them into a ball mill jar, and carry out ball milling and mixing for 6 hours, take them out, put them into a crucible, and put them into a muffle furnace After sintering under the protection of an inert gas at 320-350°C for 4 hours, ...

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Abstract

The invention discloses a thermal battery electrolyte with low melting point and high electric conductivity and a preparation method thereof. The thermal battery electrolyte is composed of the following component in percentage by weight: 25%-35% of analytically pure lithium bromide (LiBr), 10%-22% of analytically purepatassium bromide (KBr), 45%-53% of analytically pure cesium bromide (CsBr) and 8%-13% of analytically pure lithium iodide (LiI). The thermal battery electrolyte with low melting point and high electric conductivity is prepared by sintering a eutectic salt composed by the four inorganic salts (LiBr, KBr, CsBr and LiI) according to a certain proportion under protection of an inert gas; the eutectic melting point is lower than 200 DEG C; and the electric conductivity is greater than 1.8S/cm at 500 DEG C. The thermal battery electrolyte with low melting point and high electric conductivity can obviously prolong working time of thermal cells, as well as reduce the surface temperature of thermal cells at work.

Description

technical field [0001] The invention relates to a thermal battery electrolyte and a preparation method thereof, in particular to a low-melting-point high-electricity-thermal-conduction battery electrolyte and a preparation method thereof. Background technique [0002] A thermal battery is a chemical power source that uses molten salt as an electrolyte. The molten salt electrolyte is a non-conductive solid at room temperature. When in use, the pyrotechnic heat source inside the thermal battery is ignited by an external input activation signal, so that the electrolyte is instantly melted and in a high-conductivity state, and has a one-time thermal activation reserve for external output power. Battery. The internal temperature of a conventional electrolyte thermal battery is generally around 400°C to 600°C when it is working. [0003] With the development of science and technology, the working life of the thermal battery is required to be longer and longer. Originally, the wo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M6/36
CPCY02E60/12
Inventor 吴启兵龚英韬魏俊华石斌万伟华高更瑞杨辉
Owner GUIZHOU MEILING POWER SUPPLY CO LTD
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