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High-voltage-resistant and decomposition-resistant electrolyte for thermal battery and preparation method thereof

An electrolyte and thermal battery technology, applied in secondary batteries, circuits, electrical components, etc., can solve problems such as restricting development, and achieve the effects of promoting development, improving electrical conductivity, and improving high-power output characteristics

Active Publication Date: 2021-04-20
CHINA ELECTRONIC TECH GRP CORP NO 18 RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The problem to be solved by the present invention is to provide a high-voltage-resistant and decomposition-resistant electrolyte for thermal batteries and its preparation method, which effectively solves the problem of several types of electrolytes in the prior art. The limit decomposition voltage does not exceed 2.8V, which largely limits the development of high-voltage chlorine / nickel fluoride and oxide thermal battery systems.

Method used

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  • High-voltage-resistant and decomposition-resistant electrolyte for thermal battery and preparation method thereof
  • High-voltage-resistant and decomposition-resistant electrolyte for thermal battery and preparation method thereof
  • High-voltage-resistant and decomposition-resistant electrolyte for thermal battery and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] S1: Ingredients:

[0026] Binary eutectic salt Li 2 CO 3 -Li 2 SO 4 , LiCl-Li 2 SO 4 and LiCl-Li 2 CO 3 The reaction raw materials are configured in a molar ratio of 1:1:1.

[0027] S2: Raw material mixing:

[0028] The reaction raw materials were placed in a graphite crucible with a volume of 300 mL, and mixed evenly.

[0029] S3: constant temperature reaction:

[0030] The homogeneously mixed reaction raw materials were placed in a constant temperature device, and the constant temperature reaction was carried out at 540° C. for 2 hours, and the heating environment was a nitrogen atmosphere.

[0031] S4: Cooling:

[0032] After the constant temperature reaction is completed, the reaction raw materials are quickly taken out from the constant temperature device until the reaction product drops to 15°C.

[0033] S5: Broken:

[0034] The reaction product was crushed with an agate mortar and sieved, and the size of the sieve was 50 mesh to obtain a white powder...

Embodiment 2

[0037] S1: Ingredients:

[0038] Binary eutectic salt Li 2 CO 3 -Li 2 SO 4 , LiCl-Li 2 SO 4 and LiCl-Li 2 CO 3 The reaction raw materials are configured in a molar ratio of 1:1.5:0.5.

[0039] S2: Raw material mixing:

[0040] The reaction raw materials were placed in a 300mL alumina crucible and mixed evenly.

[0041] S3: constant temperature reaction:

[0042] The homogeneously mixed reaction raw materials were placed in a horizontal splitting device, and a constant temperature reaction was carried out at 540° C. for 4 hours, wherein the heating environment was a nitrogen atmosphere.

[0043] S4: Cooling:

[0044] After the constant temperature reaction is completed, the reaction raw materials are quickly taken out from the constant temperature device until the reaction product drops to 10°C.

[0045] S5: Broken:

[0046] The reaction product was crushed and sieved by a ball mill, the size of the sieve was 300 mesh, and a white powder sample was obtained, which wa...

Embodiment 3

[0049] S1: Ingredients:

[0050] Binary eutectic salt Li 2 CO 3 -Li 2 SO 4 , LiCl-Li 2 SO 4 and LiCl-Li 2 CO 3 The reaction raw materials are configured in a molar ratio of 1:1.7:0.7.

[0051] S2: Raw material mixing:

[0052] The reaction raw materials were placed in a graphite crucible with a volume of 400 mL, and mixed evenly.

[0053] S3: constant temperature reaction:

[0054] The homogeneously mixed reaction raw materials were subjected to a constant temperature reaction at 540° C., wherein the heating environment was an air atmosphere.

[0055] S4: Cooling:

[0056] After the constant temperature reaction is completed, the reaction raw materials are quickly taken out from the constant temperature device until the reaction product drops to 20°C.

[0057] S5: Broken:

[0058] The reaction product was crushed with an agate mortar and sieved, the size of the sieve was 150 mesh, and a white powder sample was obtained, which was LiCl-Li 2 CO 3 -Li 2 SO 4 eute...

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Abstract

The invention provides a high-voltage-resistant and decomposition-resistant electrolyte for a thermal battery and a preparation method of the electrolyte, the electrolyte comprises LiCl-Li2CO3-Li2SO4 eutectic salt and a binder, and the binder is one of magnesium oxide, aluminum oxide, titanium nitride or TiN ceramic materials. The electrolyte has the beneficial effects that the decomposition voltage of the prepared ternary eutectic salt remarkably exceeds that of a traditional thermal battery electrolyte system, and the development of thermal battery systems such as high-voltage chlorine / nickel fluoride and oxide is effectively promoted; the TiN ceramic material with ionic conductivity is used as an electrolyte binder, and especially in a high-temperature working state of the thermal battery, the conductivity of the electrolyte is effectively improved, so that the high-power output characteristic of the thermal battery is improved.

Description

technical field [0001] The invention belongs to the field of an electrolyte that can be used as a thermal battery and a preparation method thereof, and in particular relates to a high-pressure-resistant and decomposition-resistant electrolyte for a thermal battery and a preparation method thereof. Background technique [0002] The thermal battery belongs to a kind of disposable storage battery. It uses the heating system of the battery itself to heat and melt the non-conductive solid-state salt electrolyte to form an ion conductor, conduct the positive and negative electrodes, and generate a differential voltage between the positive and negative electrodes. A thermally activated reserve battery enters the operating state. Due to the advantages of high specific energy and high specific power, long storage time, fast activation speed and low self-discharge rate, thermal batteries are often widely used in military fields such as missiles and torpedoes. [0003] The thermal bat...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M10/0562H01M6/36
CPCY02E60/10
Inventor 白鑫涛张梦起汪东东王岩
Owner CHINA ELECTRONIC TECH GRP CORP NO 18 RES INST
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