Porous ceramic fiber diaphragm material for thermal battery and preparation method of porous ceramic fiber diaphragm material

A diaphragm material and ceramic fiber technology, which is applied in the field of porous ceramic fiber diaphragm materials for thermal batteries and its preparation, can solve the problems of low local strength, leakage of molten electrolyte, poor uniformity of ceramic diaphragm materials, etc., and achieve good discharge performance and guarantee The effect of safety performance

Pending Publication Date: 2021-11-12
SOUTH CHINA UNIV OF TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Smaller separators also hamper the design of larger unit thermal cells
Moreover, there is a risk of molten electrolyte leakage in the case of long-term discharge of the magnesium oxide sheet separator, which will cause the positive and negative electrodes of the hot battery to contact and cause short circuits and other problems.
[0004] In order to improve the safety performance and output power of thermal batteries, porous ceramic fiber separators can be used. The ceramic fibers are inorganic fibers. Due to their own characteristics such as high brittleness

Method used

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  • Porous ceramic fiber diaphragm material for thermal battery and preparation method of porous ceramic fiber diaphragm material
  • Porous ceramic fiber diaphragm material for thermal battery and preparation method of porous ceramic fiber diaphragm material
  • Porous ceramic fiber diaphragm material for thermal battery and preparation method of porous ceramic fiber diaphragm material

Examples

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Example Embodiment

[0045] Example 1 Porous ceramic fiber diaphragm material for thermal cells

[0046] A porous ceramic fiber diaphragm material for a thermal cell, wherein the diaphragm material is quantified of 70 g / m. 2 The diaphragm material method includes the steps of:

[0047] (1) According to the quantitative requirements and area of ​​the porous ceramic fiber diaphragm, Mullite ceramic fibers and adhesive fibers (PE) having a diameter of 2-3 microns, wherein the ceramic fiber accounts for 95 in weight percentage. %, Bonding fibers (PE) account for 5%, and mixed with ceramic fibers and bonding fibers into water, and disbanded in the liquid solution to obtain a uniform fiber suspension.

[0048] (2) The fiber suspension obtained by step (1) is prepared by wet molding, and then placed in a dryer in a temperature condition of 95 ° C under temperature conditions, and added adhesive fibers Ceramic fiber, its SEM map figure 1 Indicated.

[0049] (3) Weigh 8 g of isopropanol aluminum to add 70 m...

Example Embodiment

[0052] Example 2 Porous ceramic fiber diaphragm material for thermal cells

[0053] A porous ceramic fiber diaphragm material for a thermal cell, wherein the diaphragm material is quantified of 80 g / m. 2 The diaphragm material method includes the steps of:

[0054] (1) According to the quantitative requirements and area of ​​the porous ceramic fiber diaphragm material, it is weighed in diameter of 2-3 micron molite ceramic fibers and bonding fibers (PE), wherein the mullite ceramic fiber is occupied by weight percent. 95%, bonding fibers (PE) accounted for 5%, blended with ceramic fibers and bonding fibers into water, and discovered two parts of a uniform fiber suspension in the liquidation machine;

[0055] (2) Two-parts were prepared by wet molding by wet molding, and then dried in a desiccator.

[0056] (3) According to the following method, the aluminum binder solution is prepared according to the following method: 8 g of isopropanol aluminum is added to 70 ml of deionized ...

Example Embodiment

[0059] Example 3 Porous ceramic fiber diaphragm material for thermal cells

[0060] A porous ceramic fiber diaphragm material for a thermal cell, wherein the diaphragm material is quantified of 80 g / m. 2 The diaphragm material method includes the steps of:

[0061] (1) According to the quantitative requirements and area of ​​the porous ceramic fiber diaphragm, mullite ceramic fibers and adhesive fibers (PE) having a diameter of 5-7 microns are weighed, of which mullite ceramic fibers are measured by weight percent. With 95%, bonding fibers (PE) accounted for 5%, blended with ceramic fibers and adhesive fibers into water, and discovered two uniform fiber suspensions in the liquid solution.

[0062] (2) Two-parts were prepared by wet molding by wet molding, and then dried in a desiccator.

[0063] (3) According to the following method, the aluminum binder solution is prepared according to the following method: 8 g of isopropanol aluminum is added to 70 ml of deionized water, and ...

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Abstract

The invention relates to a porous ceramic fiber diaphragm material for a thermal battery and a preparation method thereof. The diaphragm material is composed of ceramic fibers and an inorganic binder. The diaphragm material can be widely applied to high-power output high-voltage thermal batteries and large-pulse thermal batteries, and the two types of thermal batteries can be used as main power supplies of weapons such as torpedoes, submarine-launched nuclear warships, hypersonic cruise missiles, hypersonic aircrafts and near space aircrafts.

Description

technical field [0001] The invention belongs to the technical field of thermal battery diaphragm materials, and in particular relates to a porous ceramic fiber diaphragm material for thermal batteries and a preparation method thereof. Background technique [0002] Thermal battery, also known as heat-activated battery, mainly uses solid molten salt as electrolyte, and relies on electrical activation or mechanical activation to ignite the internal heat source. After activation, the heating system of the battery reaches the working temperature (the working temperature is between 350°C and 550°C ), at this time, the solid molten salt electrolyte changes from a solid state to a liquid state, so that the positive and negative electrodes react with the electrolyte to generate a kind of reserve battery, because the thermal battery has a fast activation speed, high instantaneous output power, no maintenance, and is not subject to The outstanding advantages of limited installation ori...

Claims

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Application Information

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IPC IPC(8): H01M50/434H01M50/44H01M50/489H01M50/491H01M50/494H01M50/403H01M6/36
CPCH01M6/36Y02E60/10
Inventor 龙金夏堃宇胡健王建勇郭灏唐立成邹睿
Owner SOUTH CHINA UNIV OF TECH
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