Method for manufacturing tubular co-electrolysis cell

Patent metadata

Field	Value
Publication number	US-2017275769-A1
Application number	US-201515129660-A
Country	US
Kind code	A1
Filing date	Apr 30, 2015
Priority date	Dec 18, 2014
Publication date	Sep 28, 2017
Grant date	—

Abstract

The present invention relates to a method for manufacturing a tubular co-electrolysis cell which is capable of producing synthesis gas from water and carbon dioxide, and a tubular co-electrolysis cell prepared by the preparing method. The present invention comprises a tubular co-electrolysis cell which comprises: a cylindrical support comprising NIO and YSZ: a cathode layer formed on a surface of the cylindrical support, the cathode layer comprising (Sr 1-x La x )Ti 1-y M y )O 3 (M=V, Nb, Co, Mn); a solid electrolyte layer formed on the surface of the cathode layer; and an anode layer formed on a surface of the solid electrolyte layer. The tubular co-electrolysis cell manufactured by the method for manufacturing the tubular co-electrolysis cell of the present in has an excellent synthesis gas conversion rate and is capable of producing synthesis gas even at a low over voltage.

First claim

1 . A tubular co-electrolysis cell, comprising:
a cylindrical support including NIO and YSZ; a cathode layer comprising (Sr 1-x La x )(Ti 1-y M y )O 3 (M=V, Nb, Co, Mn) formed on a surface of the cylindrical support; a solid electrolyte layer formed on a surface of the cathode layer; and an anode layer formed on a surface of the solid electrolyte layer.

2 . The tubular co-electrolysis cell of claim 1 , wherein the solid electrolyte layer comprises one or more selected from the group consisting of YSZ (yttria stabilized zirconia) LSGM (strontium (Sr)- and magnesium (Mg)-doped lanthanium gallate), ScSZ (scandia stabilized zirconium oxide) GDC (gadlinium-doped ceria), and SDC (samaria-doped ceria).

3 . The tubular co-electrolysis cell of claim 1 , wherein the anode layer comprises a LSCF-GDC or YSZ-LSM and LSM complex.

4 . The tubular co-electrolysis cell of claim 1 , wherein the anode layer comprises a LSCF-GDC or YSZ-LSM and LSM complex.

5 . A method for preparing a tubular co-electrolysis cell, the method comprising:
a step 1 of mixing NIO, YSZ, and a pore forming agent, mixing with a solvent into a type of slurry, and ball-milling the slurry; a step 2 of drying and then powdering the slurry; a step 3 of producing a support for the co-electrolysis cell by adding an additive to the powdered mixture and kneading to produce a paste, and extruding the paste; a step 4 of rolling-drying the extruded support for the co-electrolysis cell; and a step 5 of pre-sintering the rolling-dried support for the co-electrolysis cell and then coating the support with a cathode, an electrolyte, and an anode, wherein the cathode comprises a (Sr 1-x La x )(Ti 1-y , M y )O 3 (M=V, Nb, Co, Mn).

6 . The method of claim 5 , wherein the pore forming agent comprises one or more selected from the group consisting of active carbon and carbon black.

7 . The method of claim 5 , wherein the additive comprises a binder, a plasticizer, and a lubricant.

8 . The method of claim 5 , wherein the pre-sintering is performed by stepwise-heating including heating up to 300° C. to 400° C., then to 700° C. to 800° C. and then 1000° C. to 1200° C.

9 . The method of claim 5 , wherein the cathode and the anode are coated by dip coating.

10 . The method of claim 9 , wherein the cathode is coated and is then thermally treated at 800° C. to 1200° C.

11 . The method of claim 9 , wherein the anode is coated and is then thermally treated at 900° C. to 1400° C.

12 . The method of claim 5 , wherein the electrolyte is coated by vacuum slurry coating.

13 . The method of claim 12 , wherein the electrolyte is coated and is then thermally treated at 1200° C. to 1600° C.

14 . The method of claim 5 , wherein a fuel used in the cathode comprises H 2 O, CO 2 and H 2 .

15 . A tubular co-electrolysis cell prepared by the method of claim 5 .

16 . (canceled)

Assignees

• Korea Energy Research Inst

Inventors

• Lim Tak-Hyoung
• Song Rak-Hyun
• Park Seok-Joo
• Lee Seung-Bok
• Lee Jong-Won

Classifications

• C01B31/18

  Chemistry & Metallurgy · mapped topic

• C25B1/02 Primary

  Hydrogen or oxygen · CPC title

• H01M8/02

  Details (electrodes H01M4/86 - H01M4/98) · CPC title

• H01M8/10

  Fuel cells with solid electrolytes · CPC title

• H01M8/12

  operating at high temperature, e.g. with stabilised ZrO2 electrolyte · CPC title