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A kind of non-oxide porous diaphragm material for high temperature battery and its preparation method

A non-oxide, porous diaphragm technology, applied in fuel cell parts, fuel cells, battery pack parts, etc., can solve the problems of easy corrosion and fracture, poor diaphragm stability, low ion conductivity, etc., and achieve good mechanical strength , reduce contact, good high temperature stability effect

Active Publication Date: 2020-01-14
WUHAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The technical problem to be solved by this invention is: provide a kind of non-oxide porous diaphragm material and preparation method thereof for high-temperature batteries, to overcome the β "-alumina diaphragm and MgO, LiAlO in the prior art above-mentioned 2 Problems such as poor stability of the oxide diaphragm, easy corrosion and fracture, and low ionic conductivity

Method used

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  • A kind of non-oxide porous diaphragm material for high temperature battery and its preparation method
  • A kind of non-oxide porous diaphragm material for high temperature battery and its preparation method
  • A kind of non-oxide porous diaphragm material for high temperature battery and its preparation method

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Effect test

Embodiment 1

[0044] Weigh 4.00 g of TiN powder and dry it in vacuum for 24 hours. The average particle size of the TiN powder used is 2 μm. MgO tube was selected as the diaphragm fixing material, and the vacuum-dried TiN powder was placed in a stainless steel mold for dry pressing at a pressure of 20 MPa to obtain a dry pressing sample.

[0045] The vacuum drying process is as follows: put the TiN powder in a vacuum drying oven, set the temperature at 80° C., and take it out after drying for 24 hours.

[0046] The TiN porous diaphragm material was prepared by sintering the sample together with the MgO tube under an argon atmosphere at atmospheric pressure. The specific process was as follows: the sintering temperature was 1200°C, the heating rate was 5°C / min, and the holding time was 3h. The obtained TiN porous diaphragm material has a thickness of 1.2 mm, an open porosity of 24%, and a bending strength of 170 MPa.

[0047] Monolithic assembly of TiN porous membrane materials to Na-NiCl ...

Embodiment 2

[0049] Choose 3.80g SiC powder, 0.20g Y 2 o 3 and 0.10gAl 2 o 3 The powders were mixed evenly and dried in vacuum for 24 hours. The average particle size of the SiC powder used is 2 μm, Y 2 o 3 and Al 2 o 3 The average particle diameter of the powder was 5 μm. A BN tube was selected as the diaphragm fixing material, and the vacuum-dried mixed powder was placed in a stainless steel mold for dry pressing at a pressure of 20 MPa to obtain a dry pressing sample.

[0050] The vacuum drying process is as follows: the mixed powder (solvent is absolute ethanol) after ball milling is placed in a vacuum drying oven, the temperature is set at 60° C., dried for 24 hours, and then taken out.

[0051] The SiC porous diaphragm material was prepared by sintering the sample together with the BN tube under an argon atmosphere at normal pressure. The specific process was as follows: the sintering temperature was 1500°C, the heating rate was 5°C / min, and the holding time was 3h. The obta...

Embodiment 3

[0054] Select 4.50g AlN powder, 0.04g B 2 o 3 and 0.10g Y 2 o 3 The powders were mixed evenly and dried in vacuum for 24 hours. The average particle size of the AlN powder used is 5 μm, B 2 o 3 and Y 2 o 3 The average particle diameter of the powder was 5 μm. MgO tube was chosen as the diaphragm fixing material. The vacuum-dried mixed powder and MgO tube were placed in a hot-pressed sintering mold.

[0055] The vacuum drying process is as follows: the mixed powder (solvent is absolute ethanol) after ball milling is placed in a vacuum drying oven, the temperature is set at 60° C., dried for 24 hours, and then taken out.

[0056] The AlN porous diaphragm material was prepared by hot-pressing and sintering the sample together with the MgO tube in an argon atmosphere. The specific process was as follows: the sintering temperature was 1450°C, the heating rate was 10°C / min, the holding time was 30min, and the pressure was 50MPa. The obtained AlN porous diaphragm material h...

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Abstract

The invention relates to a non-oxide porous diaphragm material for high-temperature batteries. The non-oxide porous diaphragm material for high-temperature batteries comprises TiB2, ZrB2, SiC, ZrC, TiC, BN, AlN, Si3N4, TiN or porous carbon, and the average particle diameter is 2 mu m. The preparation method of the material comprises the following step: carrying out normal-pressure sintering, hot pressed sintering or field-assisted sintering independently on the raw materials of the non-oxide porous diaphragm material or the combination of the raw materials of the non-oxide porous diaphragm material and raw materials of a diaphragm fixing material, thereby obtaining the non-oxide porous diaphragm material. The non-oxide porous diaphragm material provided by the invention has the advantages of stable performance, simple preparation method, low cost and the like, can effectively prevent short-circuiting and enhance the circulation efficiency and number, and can easily implement industrialization.

Description

technical field [0001] The invention belongs to the field of energy storage battery materials, in particular to a non-oxide porous diaphragm material used for high-temperature batteries and a preparation method thereof. [0002] technical background [0003] With the development of social science and technology and the improvement of productivity, the consumption of non-renewable fossil energy is increasing day by day, and environmental problems are becoming more and more serious. In order to cope with the increasingly prominent energy crisis and the pollution of the ecological environment caused by traditional fossil fuels, it is urgent to develop and utilize new types of renewable and clean energy. research hotspot. However, at present, natural wind energy, water energy, and solar power generation have problems such as discontinuity, large volatility, and inability to be directly integrated into the power grid. Large-scale continuous power supply cannot be achieved, and en...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M2/14H01M2/16H01M8/023H01M8/0234
CPCH01M8/023H01M8/0234H01M50/403H01M50/431Y02E60/10Y02E60/50
Inventor 陈斐黄梅张一弛李耘字沈强张联盟
Owner WUHAN UNIV OF TECH
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