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Composite flow inhibitor for lithium-based thermal battery electrolyte, electrolyte diaphragm material, lithium-based thermal battery and preparation method thereof

An electrolyte diaphragm and composite flow technology, which is applied in the field of lithium-based thermal batteries and their preparation, and composite flow inhibitors for lithium-based thermal battery electrolytes, can solve the problems that electrolyte flow inhibitors cannot meet high requirements, and achieve improved interface wetting Adsorption behavior, accelerating the speed of ion conduction, and improving the effect of wetting and adsorption behavior

Active Publication Date: 2019-10-25
INST OF ELECTRONICS ENG CHINA ACAD OF ENG PHYSICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a composite flow inhibitor for the electrolyte of a lithium-based thermal battery, an electrolyte diaphragm material, a lithium-based thermal battery and a preparation method thereof, so as to solve the problem that the electrolyte flow inhibitor in the existing lithium-based thermal battery cannot satisfy people's needs. demanding questions

Method used

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  • Composite flow inhibitor for lithium-based thermal battery electrolyte, electrolyte diaphragm material, lithium-based thermal battery and preparation method thereof
  • Composite flow inhibitor for lithium-based thermal battery electrolyte, electrolyte diaphragm material, lithium-based thermal battery and preparation method thereof
  • Composite flow inhibitor for lithium-based thermal battery electrolyte, electrolyte diaphragm material, lithium-based thermal battery and preparation method thereof

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Embodiment 1

[0034] The composite flow inhibitor for the lithium-based thermal battery electrolyte of this embodiment includes: magnesium oxide and magnesium fluoride, wherein the mass ratio of magnesium oxide and magnesium fluoride is 2:1.

[0035] Among them, magnesium oxide and magnesium fluoride are prepared after burning at a high temperature of 400°C for 2 hours.

[0036] The preparation method of the composite flow inhibitor for the lithium-based thermal battery electrolyte of the present embodiment comprises the following steps:

[0037] Grind the magnesium oxide and magnesium fluoride in the above ratio for 20 minutes in a dry environment, sieve through a 60-mesh sieve, and take the undersize to obtain a composite flow inhibitor.

Embodiment 2

[0039] The composite flow inhibitor for lithium-based thermal battery electrolytes in this embodiment includes: magnesium oxide and magnesium fluoride, wherein the mass ratio of magnesium oxide and magnesium fluoride is 4:1.

[0040] Among them, magnesium oxide and magnesium fluoride are prepared after burning at 600°C for 3 hours.

[0041] The preparation method of the composite flow inhibitor for the lithium-based thermal battery electrolyte of the present embodiment comprises the following steps:

[0042] Grind the magnesium oxide and magnesium fluoride in the above ratio for 25 minutes in a dry environment, sieve through 80 meshes, and take the undersize to obtain a composite flow inhibitor.

Embodiment 3

[0044] The composite flow inhibitor for the electrolyte of lithium-based thermal batteries in this embodiment includes: magnesium oxide and magnesium fluoride, wherein the mass ratio of magnesium oxide and magnesium fluoride is 5:1.

[0045] Among them, magnesium oxide and magnesium fluoride are prepared after burning at 800°C for 4 hours.

[0046] The preparation method of the composite flow inhibitor for the lithium-based thermal battery electrolyte of the present embodiment comprises the following steps:

[0047] Grind the magnesium oxide and magnesium fluoride in the above ratio for 30 minutes in a dry environment, sieve through a 100-mesh sieve, and take the undersize to obtain a composite flow inhibitor.

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Abstract

The invention discloses a composite flow inhibitor for a lithium-based thermal battery electrolyte, an electrolyte diaphragm material, a lithium-based thermal battery and a preparation method thereof,and belongs to the technical field of thermal battery materials. The composite flow inhibitor for the lithium-based thermal battery electrolyte comprises magnesium oxide and magnesium fluoride, and the mass ratio of magnesium oxide and magnesium fluoride is (2-5):1. The magnesium fluoride in the composite flow inhibitor has an inhibiting effect comparable with that of magnesium oxide on the flowing electrolyte. In addition, the magnesium fluoride also has good thermal stability, good compatibility with electrode materials such as iron disulfide and lithium-silicon alloy and no chemical reaction with the electrode materials. The adoption of magnesium fluoride as a modification material of the flow inhibitor can improve the wetting adsorption behavior of the interface of the molten salt electrolyte and the inhibitor, and accelerates the conduction speed of ions in the electrolyte sheet, thereby improving the ionic conductivity of the electrolyte sheet, and thus improving the power output characteristic of the thermal battery.

Description

technical field [0001] The invention relates to the technical field of thermal battery materials, in particular to a composite flow inhibitor for lithium-based thermal battery electrolytes, an electrolyte diaphragm material, a lithium-based thermal battery and a preparation method thereof. Background technique [0002] A thermal battery is generally composed of a positive electrode sheet, a negative electrode sheet, an electrolyte sheet (or diaphragm), a heating sheet, etc. The electrolyte sheet is mainly composed of a salt electrolyte and an electrolyte flow inhibitor. In addition to the role of ion conduction, Electronic conduction between the positive and negative plates is also prevented. The working principle of the thermal battery is to use its own heating system to heat and melt the non-conductive solid-state salt electrolyte into an ionic conductor and enter the working state. As the preferred power supply for various weapon systems, it has high specific energy, high...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M6/36
CPCH01M6/36
Inventor 杨潇薇王超曹勇刘效疆崔益秀
Owner INST OF ELECTRONICS ENG CHINA ACAD OF ENG PHYSICS
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