Mixed titanate support solid electrolyte multilayer film of solid oxide fuel cell and manufacturing method thereof

A solid oxide and solid electrolyte technology, applied in fuel cells, fuel cell parts, circuits, etc., can solve the problems of reduced activity, difficulty in using low-cost dense electrolyte films, etc., and achieve stable structure, good industrialization prospects, Effect of high electronic conductivity

Inactive Publication Date: 2014-12-10
SHANGHAI JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, since the skeleton of the porous anode structure has been sintered at high temperature, it is difficult to prepare a dense electrolyte film by using a low-cost, high-efficiency, and large-scale continuous production ceramic film-forming method.
On the one hand, the skeleton of the porous anode structure is difficult to shrink further at high temperature, which limits the shrinkage and compactness of the electrolyte film deposited on it; will grow larger, resulting in a decrease in its activity

Method used

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  • Mixed titanate support solid electrolyte multilayer film of solid oxide fuel cell and manufacturing method thereof
  • Mixed titanate support solid electrolyte multilayer film of solid oxide fuel cell and manufacturing method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] (1) Add 80 grams of La 0.2 Sr 0.7 TiO 3 And 20 grams of starch are added in the ball mill jar, then add 120 grams of butanone and ethanol mixed solvent and 2 grams of triethyl phosphate in a weight ratio of 2: 1, and mix evenly with a planetary ball mill at 300 rpm for 8 hours. Add 18 grams of polyvinyl butyral, 6 grams of dibutyl phthalate and 6 grams of polyethylene glycol 200 to the slurry mixed by ball milling, and then ball mill it with a planetary ball mill at a speed of 300 rpm. Mix well for 16 hours. The above-mentioned last ball-milled slurry was subjected to vacuum degassing treatment for 30 minutes, and cast on a tape casting machine to make La 0.2 Sr 0.7 TiO 3 The support body green body, the thickness of the support body green body after drying is 700 μm.

[0028] (2) ethyl cellulose is dissolved in terpineol, and the ethyl cellulose terpineol solution that makes ethyl cellulose content is 2wt% is applied to transition layer and electrolyte as screen ...

Embodiment 2

[0035] (1) Carry out La according to embodiment 1 0.2 Sr 0.7 TiO 3 Support body green body and ethyl cellulose terpineol solution preparation, and transition layer deposition.

[0036] (2) Add 9 grams of YSZ powder to 27 ml of ethylcellulose terpineol solution, grind for more than 2 hours to obtain a stable and uniform slurry, and deposit the prepared electrolyte slurry evenly on the transition layer to form an electrolyte layer.

[0037] (3) Carry out co-sintering of the support body green body, the transition layer and the electrolyte layer according to Example 1, and prepare a doped titanate-supported solid electrolyte multilayer membrane.

Embodiment 3

[0039] (1) Add 60 grams of La 0.2 Sr 0.7 TiO 3 , 20g Al 2 o 3 Add the powder and 20 grams of starch into the ball mill jar, then add 120 grams of methyl ethyl ketone and ethanol mixed solvent and 2 grams of triethyl phosphate in a weight ratio of 2:1, and use a planetary ball mill to mix evenly at 300 rpm for 8 hours. Add 18 grams of polyvinyl butyral, 6 grams of dibutyl phthalate and 6 grams of polyethylene glycol 200 to the slurry mixed by ball milling, and then ball mill it with a planetary ball mill at a speed of 300 rpm. Mix well for 16 hours. The above-mentioned last ball-milled slurry was subjected to vacuum degassing treatment for 30 minutes, and cast on a tape casting machine to make La 0.2 Sr 0.7 TiO 3 The support body green body, the thickness of the support body green body after drying is 700 μm.

[0040] (2) Preparation of ethylcellulose terpineol solution, transition layer and electrolyte layer deposition according to Example 1.

[0041] (3) Carry out co...

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Abstract

The invention relates to a mixed titanate support solid electrolyte multilayer film of a solid oxide fuel cell and a manufacturing method of the mixed tianate support solid electrolyte multilayer film of the solid oxide fuel cell. The multilayer film is formed by a transition layer film and an electrolytic layer film which are sequentially formed through depositing on an anode main electronic conduction phase and a structural framework increase phase; the anode main electronic conduction phase is porous perovskite type mixed titanate composite oxides; and the structural framework increase phase is aluminum oxide or mixed zirconium oxide or mixture of the aluminum oxide and the mixed zirconium oxide. The manufacturing method provided by the invention comprises the steps: combining the casting method and the screen printing method, adopting the casting method to manufacture a support green body, adopting the screen printing method to respectively form the transition layer and the electrolytic layer on the support green body through depositing, and firing the support green body, the transition layer and the electrolytic layer at certain temperature to obtain the multilayer film with different dimensions. Compared with the prior art, the porous anode support formed in the invention keeps stable structure in reducing atmosphere for a long time, has high electronic conductivity, can be subjected to oxidation-reduction circulation for many times, resists carbon deposition and has sulfur resisting property.

Description

technical field [0001] The invention relates to a method in the technical field of fuel cells, in particular to a solid oxide fuel cell doped titanate-supported solid electrolyte multilayer film and a preparation method thereof. Background technique [0002] Solid Oxide Fuel Cell (Solid Oxide Fuel Cell, SOFC) is an all-solid-state power generation device that directly converts the chemical energy in the fuel into electrical energy through an electrochemical reaction. The conversion process has many advantages, among which the outstanding advantage is the wide applicability of fuel, that is, hydrogen, carbon monoxide and hydrocarbons can be used as fuel, so hydrogen, carbon monoxide, natural gas, liquefied petroleum gas, coal gas, biomass can be widely used Various hydrocarbon fuels such as gas, methanol and ethanol. Solid oxide fuel cells have a wide range of applications, and their main applications include distributed power stations, household power stations, vehicle auxi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M8/02H01M8/1253H01M8/126
CPCY02E60/50Y02P70/50
Inventor 屠恒勇罗坤李斯琳余晴春于立军
Owner SHANGHAI JIAOTONG UNIV
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