Electrolyte membrane, fuel cell including same, battery module including fuel cell, and method for manufacturing electrolyte membrane

Patent metadata

Field	Value
Publication number	US-2017222229-A1
Application number	US-201515515289-A
Country	US
Kind code	A1
Filing date	Sep 25, 2015
Priority date	Sep 30, 2014
Publication date	Aug 3, 2017
Grant date	—

Abstract

The present specification relates to an electrolyte membrane, a fuel cell including the same, a battery module including the fuel cell, and a method for manufacturing the electrolyte membrane.

First claim

1 - 16 . (canceled)

17 . An electrolyte membrane which comprises a lanthanum-gallium-based composite metal oxide, and has a color region of 0.39≦x≦0.40 and 0.35≦y≦0.36 based on the CIE (Commission Internationale de l′Eclairage) x, y chromaticity distribution table,
wherein the electrolyte membrane manufactured by a method comprising:
preparing a mixture comprising a precursor of a lanthanum-gallium-based composite metal oxide;
warming the mixture to a temperature less than 950° C.;
synthesizing the precursor in the mixture into lanthanum-gallium-based composite metal oxide particles; and
forming the electrolyte membrane by using a slurry comprising the lanthanum-gallium-based composite metal oxide particles,
the synthesized composite metal oxide particles comprise lanthanum-gallium-based composite metal oxide particles which are represented by the following Chemical Formula 1, and secondary phase particles,
a content of the secondary phase particles is 5 wt % or more and 30 wt % or less based on the total weight of the synthesized composite metal oxide particles,
wherein the lanthanum-gallium-based composite metal oxide of the electrolyte membrane is represented by the following Chemical Formula 1:
La 1-x Q x Ga 1-y Z y O 3-δ   [Chemical Formula 1]

in Chemical Formula 1,
Q is strontium, Z is magnesium, and 0<x<0.25, 0<y<0.25, and 0<δ<0.5.

18 . The electrolyte membrane of claim 17 , wherein the electrolyte membrane has a brown color.

19 . The electrolyte membrane of claim 17 , wherein the lanthanum-gallium-based composite metal oxide is a perovskite-type particle.

20 . A fuel cell comprising:
an air electrode; a fuel electrode; and the electrolyte membrane of claim 17 disposed between the air electrode and the fuel electrode.

21 . A battery module comprising the fuel cell of claim 20 as a unit cell.

22 . A secondary battery comprising:
a cathode; an anode; and the electrolyte membrane of claim 17 disposed between the cathode and the anode.

23 . A battery module comprising the secondary battery of claim 22 as a unit cell.

24 . A method for manufacturing an electrolyte membrane which comprises a lanthanum-gallium-based composite metal oxide, and has a color region of 0.39≦x≦0.40 and 0.35≦y≦0.36 based on the CIE x, y chromaticity distribution table,
wherein a forming of the electrolyte membrane comprises:
preparing a mixture comprising a precursor of a lanthanum-gallium-based composite metal oxide;
warming the mixture to a temperature less than 1,000° C.;
synthesizing the precursor in the mixture into lanthanum-gallium-based composite metal oxide particles; and
forming the electrolyte membrane by using a slurry comprising the lanthanum-gallium-based composite metal oxide particles,
the synthesized composite metal oxide particles comprise lanthanum-gallium-based composite metal oxide particles which are represented by the following Chemical Formula 1, and secondary phase particles,
a content of the secondary phase particles is 5 wt % or more and 30 wt % or less based on the total weight of the synthesized composite metal oxide particles,
wherein the lanthanum-gallium-based composite metal oxide of the electrolyte membrane is represented by the following Chemical Formula 1:
La 1-x Q x Ga 1-y Z y O 3-δ   [Chemical Formula 1]

in Chemical Formula 1,
Q is strontium, Z is magnesium, and 0<x<0.25, 0<y<0.25, and 0<δ<0.5.

25 . The method of claim 24 , wherein the precursor of the lanthanum-gallium-based composite metal oxide comprises:
any one of oxide of lanthanum, oxynitride of lanthanum, and sulfur oxide of lanthanum; any one of oxide of gallium, oxynitride of gallium, and sulfur oxide of gallium; any one of oxide of strontium, oxynitride of strontium, and sulfur oxide of strontium; and any one of oxide of magnesium, oxynitride of magnesium, and sulfur oxide of magnesium.

Assignees

• Lg Chemical Ltd

Inventors

• Kim Jong Woo
• Ryoo Changseok
• Kim Gyunjoong
• Choi Kwangwook
• Im Sanghyeok
• Heo Yeonhyuk

Classifications

• H01M8/1246

  the electrolyte consisting of oxides · CPC title

• H01M8/04149

  by diffusion, e.g. making use of membranes · CPC title

• B01J23/10

  of rare earths · CPC title

• C01P2006/40

  Electric properties · CPC title

• H01M10/0562

  Solid materials · CPC title