Solid oxide electrolytic cell with CGO/ESB double electrolyte layers

Abstract

According to the invention, a metal support type solid oxide electrolytic cell adopting a CGO / ESB electrolyte base is provided and specifically and structurally comprises a metal support layer, a cathode layer, a CGO electrolyte layer, an ESB electrolyte layer and an anode layer which are stacked in sequence. The GOO / ESB electrolyte-based metal-supported solid oxide electrolytic cell can realize the purpose of operating the solid oxide electrolytic cell at medium and low temperatures, and compared with a GOO / YSZ electrolyte-based metal-supported solid oxide electrolytic cell, the GOO / ESB electrolyte-based metal-supported solid oxide electrolytic cell has the advantages that the input voltage of the electrolytic cell is reduced, the operating cost is saved, and the industrial development of SOEC is favorably realized.

Description

technical field

[0001] The invention belongs to the technical field of solid oxide electrolytic cells, and more specifically relates to a metal-supported solid oxide electrolytic cell based on a CGO / ESB double electrolyte layer. Background technique

[0002] Solid Oxide Electrolysis Cell (SOEC for short) is a device with a completely solid-state structure that operates in a high-temperature environment. It is an advanced electrochemical energy conversion device that can use electricity and heat generated by clean primary energy. with H 2 O and / or CO 2 It is a very promising technology to prepare hydrogen or hydrocarbon fuels through high-efficiency electrolysis as raw materials, which has the advantages of high energy conversion efficiency, environmental friendliness and fuel diversity.

[0003] The key to realizing the industrialization of SOEC is to reduce the cost of the electrolytic cell, and an effective way to reduce the cost is to reduce the operating temperature of...

Examples

Embodiment 1

[0036] Preparation of CGO electrolyte powder by sol-gel combustion method: cerium nitrate hexahydrate (Ce(NO 3 ) 3 ·6H 2 O), gadolinium oxide (Gd 2 o 3 ) and citric acid (CA) as initial raw materials, each raw material was accurately weighed according to the stoichiometric ratio of CGO, and Gd was dissolved in dilute nitric acid 2 o 3 For powder, use deionized aqueous solution and other raw materials to form solutions respectively, then mix the above solutions, and use ammonia water to adjust the pH value of the mixed solution until the solution is neutral; the mixed solution is heated and stirred at 45°C for 10 hours to form a gel; the gel Heat in an electric furnace to form a light yellow powder; finally, keep the prepared powder at 600°C for 1h, then take it out and calcinate at 750°C for 2h to obtain CGO electrolyte powder.

[0037] ESB was synthesized by EDTA-citric acid sol-gel method (ie (Bi 2 o 3 ) 0.8 (Er 2 o 3 ) 0.2 ) Electrolyte powder: Accurately weigh a...

Embodiment 2

[0048] The CGO / YSZ electrolyte-based MS-SOEC was prepared by the same method as in Example 1, except that the thickness of the ESB electrolyte layer was 2 μm, and the thickness of the electrolyte functional layer was 12 μm.

Embodiment 3

[0050] The CGO / YSZ electrolyte-based MS-SOEC was prepared by the same method as in Example 1, except that the thickness of the ESB electrolyte layer was 4 μm, and the thickness of the electrolyte functional layer was 14 μm.

technical field

[0001] The invention belongs to the technical field of solid oxide electrolytic cells, and more specifically relates to a metal-supported solid oxide electrolytic cell based on a CGO / ESB double electrolyte layer. Background technique

[0002] Solid Oxide Electrolysis Cell (SOEC for short) is a device with a completely solid-state structure that operates in a high-temperature environment. It is an advanced electrochemical energy conversion device that can use electricity and heat generated by clean primary energy. with H 2 O and / or CO 2 It is a very promising technology to prepare hydrogen or hydrocarbon fuels through high-efficiency electrolysis as raw materials, which has the advantages of high energy conversion efficiency, environmental friendliness and fuel diversity.

[0003] The key to realizing the industrialization of SOEC is to reduce the cost of the electrolytic cell, and an effective way to reduce the cost is to reduce the operating temperature of...

Examples

Embodiment 1

[0036] Preparation of CGO electrolyte powder by sol-gel combustion method: cerium nitrate hexahydrate (Ce(NO 3 ) 3 ·6H 2 O), gadolinium oxide (Gd 2 o 3 ) and citric acid (CA) as initial raw materials, each raw material was accurately weighed according to the stoichiometric ratio of CGO, and Gd was dissolved in dilute nitric acid 2 o 3 For powder, use deionized aqueous solution and other raw materials to form solutions respectively, then mix the above solutions, and use ammonia water to adjust the pH value of the mixed solution until the solution is neutral; the mixed solution is heated and stirred at 45°C for 10 hours to form a gel; the gel Heat in an electric furnace to form a light yellow powder; finally, keep the prepared powder at 600°C for 1h, then take it out and calcinate at 750°C for 2h to obtain CGO electrolyte powder.

[0037] ESB was synthesized by EDTA-citric acid sol-gel method (ie (Bi 2 o 3 ) 0.8 (Er 2 o 3 ) 0.2 ) Electrolyte powder: Accurately weigh a...

Embodiment 2

[0048] The CGO / YSZ electrolyte-based MS-SOEC was prepared by the same method as in Example 1, except that the thickness of the ESB electrolyte layer was 2 μm, and the thickness of the electrolyte functional layer was 12 μm.

Embodiment 3

[0050] The CGO / YSZ electrolyte-based MS-SOEC was prepared by the same method as in Example 1, except that the thickness of the ESB electrolyte layer was 4 μm, and the thickness of the electrolyte functional layer was 14 μm.

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