Triple conducting cathode material for intermediate temperature protonic ceramic electrochemical devices

Patent metadata

Field	Value
Publication number	US-10014529-B2
Application number	US-201614991027-A
Country	US
Kind code	B2
Filing date	Jan 8, 2016
Priority date	Jan 8, 2015
Publication date	Jul 3, 2018
Grant date	Jul 3, 2018

Abstract

The present invention relates to a protonic ceramic fuel cell, a cathode for a protonic ceramic fuel cell, and a method of making the same. More specifically, the cathode for a protonic ceramic fuel cell utilizes a phase-pure perovskite structure of the compound BaCo 0.4 Fe 0.4 Zr 0.2-x Y x O 3-δ , where x is between about 0 and about 0.2. The cathode material may then be utilized in a PCFC as either a thin film porous cathode or as nanoparticles infiltrated into a cathode bone having a different structure.

First claim

What is claimed is:

1. A cathode for use in a protonic ceramic fuel cell, comprising BaCo 0.4 Fe 0.4 Zr 0.2-x Y x O 3-δ , wherein x is greater than 0 and less than 0.2, and wherein δ is between about 0 and about 0.3.

2. The cathode of claim 1 , further comprising a phase-pure perovskite structure.

3. The cathode of claim 1 , wherein the cathode is a porous film cathode.

4. The cathode of claim 1 , further comprising a cathode bone with a formula of BaCe 0.6 Zr 0.3 Y 0.1 O 3-δ .

5. The cathode of claim 4 , wherein the BaCo 0.4 Fe 0.4 Zr 0.1 Y 0.1 O 3-6 is a plurality of nanoparticles and wherein the plurality of nanoparticles is deposited on at least one wall of the cathode bone.

6. The cathode of claim 1 , wherein a thickness of the cathode is between about 5 and about 70 microns.

7. The cathode of claim 1 , wherein the cathode is BaCo 0.4 Fe 0.4 Zr 0.1 Y 0.1 O 3-δ .

8. The cathode of claim 1 , wherein x is greater than 0 and less than 0.15.

9. A protonic ceramic fuel cell, comprising:
a cathode comprising BaCo 0.4 Fe 0.4 Zr 0.2-x Y x O 3-δ , wherein x is greater than 0 and less than 0.2, and wherein δ is between about 0 and about 0.3;
an electrolyte; and
an anode.

10. The protonic ceramic fuel cell of claim 9 , wherein the electrolyte is comprised of at least one of a BaCe 0.7 Zr 0.1 Y 0.1 Yb 0.1 O 3-δ -1.0 wt % NiO, a BaCe 0.7 Zr 0.1 Y 0.1 Yb 0.1 O 3-δ -1.0 wt % CoO, a BaCe 0.7 Zr 0.1 Y 0.1 Yb 0.1 O 3-δ -1.0 wt % CuO, a BaCe 0.7 Zr 0.1 Y 0.1 Yb 0.1 O 3-δ -1.0 wt % ZnO, a BaZr 0.8 Y 0.2 O 3-δ -1.0 wt % NiO, a BaZr 0.8 Y 0.2 O 3-δ -1.4 wt % CuO, a BaZr 0.8 Y 0.2 O 3-δ -1.0 wt % CoO, a BaZr 0.8 Y 0.2 O 3-δ -1.0 wt % ZnO, a BaCe 0.6 Zr 0.3 Y 0.1 O 3-δ -1.3 wt % CuO, a BaCe 0.6 Zr 0.3 Y 0.1 O 3-δ -1.0 wt % NiO, a BaCe 0.6 Zr 0.3 Y 0.1 O 3-δ -1.0 wt % CoO, a BaCe 0.6 Zr 0.3 Y 0.1 O 3-δ -1.0 wt % ZnO, a BaCe 0.8 Y 0.2 O 3-δ -1.0 wt % CoO, a BaCe 0.8 Y 0.2 O 3-δ -1.0 wt % NiO, BaCe 0.8 Y 0.2 O 3-δ -1.0 wt % ZnO, and a BaCe 0.8 Y 0.2 O 3-δ -1.0 wt % CuO.

11. The protonic ceramic fuel cell of claim 9 , wherein the anode is comprised of at least one of a BaCe 0.7 Zr 0.1 Y 0.1 Yb 0.1 O 3-δ —Ni, a BaCe 0.6 Zr 0.3 Y 0.1 O 3-δ —Ni, a BaZr 0.8 Y 0.2 O 3-δ —Ni, and a BaCe 0.8 Y 0.2 O 3-δ —Ni.

12. The protonic fuel cell of claim 9 , wherein the cathode s a porous film cathode.

13. The protonic ceramic fuel cell of claim 9 , wherein the cathode further comprises a cathode bone with a formula of BaCe 0.6 Zr 0.3 Y 0.1 O 3-δ .

14. The protonic ceramic fuel cell of claim 13 , wherein the BaCo 0.4 Fe 0.4 Zr 0.1 Y 0.1 O 3-δ is a plurality of nanoparticles and wherein the plurality of nanoparticles is deposited on at least one wall of the cathode bone.

15. The protonic ceramic fuel cell of claim 9 , wherein the cathode further comprises a phase-pure perovskite structure.

16. The protonic ceramic fuel cell of claim 9 , wherein the cathode is BaCo 0.4 Fe 0.4 Zr 0.1 Y 0.1 O 3-δ .

17. The protonic ceramic fuel cell of claim 9 , wherein a thickness of the cathode is between about 5 and about 70 microns.

18. The protonic ceramic fuel cell of claim 9 , wherein the anode comprises at least one of a BaCe 0.7 Zr 0.1 Y 0.1 Yb 0.1 O 3-δ —Ni, a BaCe 0.6 Zr 0.3 Y 0.1 O 3-δ —Ni, BaZr 0.8 Y 0.2 O 3-δ —Ni, and a BaZr 0.8 Y 0.2 O 3-δ —Ni and the electrolyte comprises at least one a BaCe 0.7 Zr 0.1 Y 0.1 Yb 0.1 O 3-δ -1.0 wt % NiO, a BaCe 0.7 Zr 0.1 Y 0.1 Yb 0.1 O 3-δ -1.0 wt % CoO, a BaCe 0.7 Zr 0.1 Y 0.1 Yb 0.1 O 3-δ -1.0 wt % CuO, a BaCe 0.7 Zr 0.1 Y 0.1 Yb 0.1 O 3-δ -1.0 wt % ZnO, a BaZr 0.8 Y 0.2 O 3-δ -1.0 wt % NiO, a BaZr 0.8 Y 0.2 O 3-δ -1.4 wt % CuO, a BaZr 0.8 Y 0.2 O 3-δ -1.0 wt % CoO, a BaZr 0.8 Y 0.2 O 3-δ -1.0 wt % ZnO, a BaCe 0.6 Zr 0.3 Y 0.1 O 3-δ -1.3 wt % CuO, a BaCe 0.6 Zr 0.3 Y 0.1 O 3-δ -1.0 wt % NiO, a BaCe 0.6 Zr 0.3 Y 0.1 O 3-δ -1.0 wt % CoO, a BaCe 0.6 Zr 0.3 Y 0.1 O 3-δ -1.0 wt % ZnO, a BaCe 0.8 Y 0.2 O 3-δ -1.0 wt % CoO, a BaCe 0.8 Y 0.2 O 3-δ -1.0 wt % NiO, BaCe 0.8 Y 0.2 O 3-δ -1.0 wt % ZnO, and a BaCe 0.8 Y 0.2 O 3-δ -1.0 wt % CuO.

19. The cathode of claim 9 , wherein x is greater than 0 and less than 0.15.

20. The cathode of claim 9 wherein x is 0.1.

Assignees

• Colorado School Of Mines

Inventors

• Tong Jianhua
• O'Hayre Ryan Patrick
• Shang meng
• Duan Chuancheng

Classifications

• H01M2008/1293

  Fuel cells with solid oxide electrolytes · CPC title

• H01M2300/0077

  based on zirconium oxide · CPC title

• H01M4/8621 Primary

  containing only metallic or ceramic material, e.g. made by sintering or sputtering · CPC title

• H01M4/8889

  Cosintering or cofiring of a catalytic active layer with another type of layer · CPC title

• H01M4/9033

  Complex oxides, optionally doped, of the type M1MeO3, M1 being an alkaline earth metal or a rare earth, Me being a metal, e.g. perovskites · CPC title