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Preparation method of ultra-thin and dense electrolyte for solid oxide battery and ultra-thin and dense electrolyte obtained therefrom

A technology of solid oxides and electrolytes, applied in the direction of electrolyte immobilization/gelation, fuel cells, circuits, etc., can solve the problems of easy damage to functional layers, easy opening of holes and air leakage, etc., to save energy costs and sintering temperature The effect of reducing and improving the electrochemical performance of SOC

Active Publication Date: 2022-06-21
SHANGHAI INST OF APPLIED PHYSICS - CHINESE ACAD OF SCI
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  • Claims
  • Application Information

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Problems solved by technology

[0005] In order to solve the above-mentioned problems in the solid oxide battery in the prior art that the electrolyte film is easy to open holes and leak air and the high temperature sintering is easy to damage the functional layer, the present invention provides a method for preparing an ultra-thin and dense electrolyte for a solid oxide battery and The resulting ultrathin dense electrolyte

Method used

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  • Preparation method of ultra-thin and dense electrolyte for solid oxide battery and ultra-thin and dense electrolyte obtained therefrom
  • Preparation method of ultra-thin and dense electrolyte for solid oxide battery and ultra-thin and dense electrolyte obtained therefrom
  • Preparation method of ultra-thin and dense electrolyte for solid oxide battery and ultra-thin and dense electrolyte obtained therefrom

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] 25g YSZ powder (accounting for 30% of the slurry mass), 1g MIL-88 (Fe-MOF), 2g triethanolamine, 3g ethyl cellulose, 2.5g dioctyl phthalate and 50g terpineol were mixed to obtain Mixed electrolyte slurry.

[0031] After the mixed electrolyte slurry is ball-milled, it is further ground on a three-roll machine to obtain a ground electrolyte slurry.

[0032] Using the screen printing method, the ground electrolyte slurry was evenly printed on the half-cell green embryo (the hydrogen electrode was NiO-3YSZ, and the functional layer was NiO-8YSZ). electrolyte. The scanning electron microscope photograph of the surface of the dense electrolyte is shown in Figure 1B shown, with Figure 1A Compared with the SEM photo of the electrolyte surface obtained without MOFs addition, the electrolyte obtained by adding MOFs according to the present invention is more dense. The scanning electron microscope photograph of the electrolyte cross-section of the surface of the dense electrol...

Embodiment 2

[0035] 108g cerium oxide powder (accounting for 65% of the slurry), 1Gzif-67 (Co-MOF), 2g triethanolamine, 3g ethyl cellulose, 2.5g dioctyl phthalate and 50g terpineol were mixed to obtain Mixed electrolyte slurry.

[0036] After the mixed electrolyte slurry is ball-milled, it is further ground on a three-roll machine to obtain a ground electrolyte slurry.

[0037] Using the screen printing method, the ground electrolyte slurry was evenly printed on the half-cell green embryo (the hydrogen electrode was NiO-3YSZ, and the functional layer was NiO-8YSZ). electrolyte.

[0038] Electrochemical testing of cells with dense electrolytes such as image 3 and Figure 4 It can be seen that the open-circuit voltage, power and charging current in the charging mode are higher than those of the battery assembled without MOFs electrolyte, and the electrochemical performance is good.

Embodiment 3

[0040] Mix 25g barium oxide powder (30% of the slurry), 1g CTGU (Ni-MOF), 2g triethanolamine, 3g ethyl cellulose, 2.5g dioctyl phthalate and 50g terpineol to obtain a mixed electrolyte slurry.

[0041] After the mixed electrolyte slurry is ball-milled, it is further ground on a three-roll machine to obtain a ground electrolyte slurry.

[0042] Using the screen printing method, the ground electrolyte slurry was evenly printed on the half-cell green embryo (the hydrogen electrode was NiO-3YSZ, and the functional layer was NiO-8YSZ). electrolyte.

[0043] Electrochemical testing of cells with dense electrolytes such as image 3 and Figure 4 As shown, it can be seen that the open-circuit voltage, power and charging current in the discharging mode are higher than those of the battery assembled without MOFs electrolyte, and the electrochemical performance is good.

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Abstract

The invention provides a method for preparing an ultra-thin and dense electrolyte for a solid oxide battery, which comprises mixing electrolyte powder, a metal-organic framework material, a dispersant, a binder, a plasticizer, and a solvent to obtain a mixed electrolyte slurry; Mix the electrolyte slurry for grinding to obtain the ground electrolyte slurry; use the screen printing method to evenly print the ground electrolyte slurry on the green body of the half-cell, and then gradually raise the temperature to 1200 ° C ~ 1400 ° C for debinding and sintering to obtain ultra-thin Dense electrolyte. The invention also provides an ultra-thin and dense electrolyte obtained by the above preparation method. According to the preparation method of the ultra-thin and dense electrolyte for the solid oxide battery of the present invention, an ultra-thin and dense electrolyte layer is obtained at a relatively low sintering temperature, which saves energy costs. According to the preparation method of the present invention, the sintering temperature is reduced, and the three-electrode co-firing of the electrolyte, the functional layer and the hydrogen electrode can be realized, and the process flow is simplified.

Description

technical field [0001] The present invention relates to a solid oxide battery, and more particularly to a preparation method of an ultra-thin and dense electrolyte of a solid oxide battery and an ultra-thin and dense electrolyte obtained therefrom. Background technique [0002] Solid oxide battery (SOC), as an all-solid-state energy conversion device, can realize the interconversion of chemical energy and electrical energy, and has the advantages of high energy conversion efficiency, environmental friendliness, low noise and strong reliability, and is considered to be the most applicable. Prospective energy conversion device. Yttria-stabilized zirconia (YSZ) is the most widely used SOC electrolyte material, with good stability against redox, cheap and easy to obtain, and has sufficiently high oxygen ion conductivity, good chemical stability and high temperature at high temperature. Mechanical behavior. [0003] The operating temperature of the commercialized SOC is general...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M8/1246H01M8/1253H01M8/126
CPCH01M8/1246H01M8/1253H01M8/126H01M2008/1293H01M2300/0085Y02E60/50
Inventor 王建强杨云林逍孔芳弟杨军鹏张林娟解春雨肖国萍
Owner SHANGHAI INST OF APPLIED PHYSICS - CHINESE ACAD OF SCI
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