Redox-active oxide materials for thermal energy storage

Patent metadata

Field	Value
Publication number	US-11339766-B2
Application number	US-201916574169-A
Country	US
Kind code	B2
Filing date	Sep 18, 2019
Priority date	Sep 5, 2014
Publication date	May 24, 2022
Grant date	May 24, 2022

Abstract

Thermochemical storage materials having the general formula AxA′1-xByB′1-yO3-δ, where A=La, Sr, K, Ca, Ba, Y and B=Mn, Fe, Co, Ti, Ni, Cu, Zr, Al, Y, Cr, V, Nb, Mo, are disclosed. These materials have improved thermal storage energy density and reaction kinetics compared to previous materials. Concentrating solar power thermochemical systems and methods capable of storing heat energy by using these thermochemical storage materials are also disclosed.

First claim

What is claimed is:

1. A thermochemical system, comprising:
a concentrated solar receiver;
a thermochemical composition provided to the concentrated solar receiver, the thermochemical composition comprising a material having a formula Ca x A′ 1-x B y B′ 1-y O 3-δ , where A′ 1-x =La, Sr, Ba, Y and B and B′=Mn, Ti, Zr, Al, Cr, Mo, and 0≤x≤1, 0<y<1 and 0≤δ≤1.

2. The system of claim 1 , wherein and A′ 1-x is La, Sr or Y.

3. The system of claim 1 , wherein B y is Al or Ti, and B′ 1-y is Mn.

4. The system of claim 1 , wherein the thermochemical composition is selected from a group consisting of:
CaTi 0.2 Mn 0.8 O 3-δ
CaTi 0.4 Mn 0.6 O 3-δ
CaAl 0.1 Mn 0.9 O 3-δ
CaAl 0.2 Mn 0.8 O 3-δ
CaAl 0.3 Mn 0.7 O 3-δ
CaAl 0.4 Mn 0.6 O 3-δ
Ca 0.8 La 0.2 Ti 0.2 Mn 0.8 O 3-δ
Ca 0.8 Sr 0.2 Ti 0.2 Mn 0.8 O 3-δ
Ca 0.9 Y 0.1 Al 0.2 Mn 0.8 O 3-δ
Ca 0.8 Y 0.2 Al 0.2 Mn 0.8 O 3-δ
Ca 0.9 Y 0.1 Al 0.4 Mn 0.6 O 3-δ
Ca 0.8 Y 0.2 Al 0.4 Mn 0.6 O 3-δ
CaZr 0.2 Mn 0.8 O 3-δ .

5. A thermochemical system, comprising:
a concentrated solar receiver;
a thermochemical composition provided to the concentrated solar receiver, the thermochemical composition comprising a perovskite material selected from the group consisting essentially of a formula La 0.2 Sr 0.7 K 0.1 Co 0.9 Mn 0.1 O 3-δ , and La x Sr 1-x Co y Mn 1-y O 3-δ where 0≤x<1 0<y<1 and 0≤δ≤1.

6. The system of claim 5 , wherein the thermochemical composition is selected from a group consisting of:
La 0.1 Sr 0.9 Co 0.9 Mn 0.1 O 3-δ
La 0.1 Sr 0.9 Co 0.8 Mn 0.2 O 3-δ
La 0.1 Sr 0.9 Co 0.7 Mn 0.3 O 3-δ
La 0.2 Sr 0.8 Co 0.9 Mn 0.1 O 3-δ
La 0.2 Sr 0.8 Co 0.8 Mn 0.2 O 3-δ
La 0.2 Sr 0.8 Co 0.7 Mn 0.3 O 3-δ
La 0.3 Sr 0.7 Co 0.9 Mn 0.1 O 3-δ
La 0.3 Sr 0.7 Co 0.8 Mn 0.2 O 3-δ
La 0.3 Sr 0.7 Co 0.7 Mn 0.3 O 3-δ
La 0.4 Sr 0.6 Co 0.6 Mn 0.4 O 3-δ
La 0.7 Sr 0.3 Co 0.3 Mn 0.7 O 3-δ
La 0.8 Sr 0.2 Co 0.2 Mn 0.8 O 3-δ
La 0.8 Sr 0.2 Co 0.3 Mn 0.7 O 3-δ
La 0.9 Sr 0.1 Co 0.1 Mn 0.9 O 3-δ
La 0.9 Sr 0.1 Co 0.2 Mn 0.8 O 3-δ
La 0.9 Sr 0.1 Co 0.3 Mn 0.7 O 3-δ .

7. A method, comprising:
providing a thermochemical material to a concentrated solar receiver, the thermochemical material comprising a perovskite material having a formula A x A′ 1-x B y B′ 1-y O 3-δ , where A x =Ca and A′ 1-x =La, Sr, K, Ba, Y and B y and B′ 1 - y =Mn, Ti, Ni, Cu, Zr, Al, Y, Cr, V, Nb, Mo, and 0<x≤1, 0<y<1 and 0≤δ≤1.

8. The method of claim 7 , wherein A′ 1-x is Sr or Y.

9. The method of claim 7 , wherein B y is Al or Ti, and B′ 1-y is Mn.

10. The method of claim 7 , wherein the thermochemical composition is selected from a group consisting of:
CaTi 0.2 Mn 0.8 O 3-δ
CaTi 0.4 Mn 0.6 O 3-δ
CaAl 0.1 Mn 0.9 O 3-δ
CaAl 0.2 Mn 0.8 O 3-δ
CaAl 0.3 Mn 0.7 O 3-δ
CaAl 0.4 Mn 0.6 O 3-δ
CaCo 0.2 Mn 0.8 O 3-δ
Ca 0.8 La 0.2 Ti 0.2 Mn 0.8 O 3-δ
Ca 0.8 Sr 0.2 Ti 0.2 Mn 0.8 O 3-δ
Ca 0.9 Y 0.1 MnO 3-δ
Ca 0.8 Y 0.2 MnO 3-δ
Ca 0.7 Y 0.3 MnO 3-δ
Ca 0.9 Y 0.1 Al 0.2 Mn 0.8 O 3-δ
Ca 0.8 Y 0.2 Al 0.2 Mn 0.8 O 3-δ
Ca 0.9 Y 0.1 Al 0.4 Mn 0.6 O 3-δ
Ca 0.8 Y 0.2 Al 0.4 Mn 0.6 O 3-δ
CaZr 0.2 Mn 0.8 O 3-δ .

11. A method, comprising:
providing a thermochemical material to a concentrated solar receiver, the thermochemical material comprising a perovskite material having a formula La x Sr 1-x-z K z Co y M 1-y O 3-δ, where M=Mn or Fe and 0<x≤1, 0<y<1, 0<z≤0.5 and 0≤δ≤1.

12. The method of claim 11 , wherein the perovskite material is La 0.2 Sr 0.7 K 0.1 Co 0.9 Mn 0.1 O 3-δ .

13. A thermochemical system, comprising:
a concentrated solar receiver;
a thermochemical composition provided to the concentrated solar receiver,
wherein the thermochemical composition is selected from a group consisting of:
Ca 0.9 Y 0.1 MnO 3-δ
Ca 0.8 Y 0.2 MnO 3-δ
Ca 0.7 Y 0.3 MnO 3-δ.

Assignees

• Nat Tech & Eng Solutions Sandia Llc

Inventors

• Babiniec Sean M
• Ambrosini Andrea
• Coker Eric N
• Miller James E

Classifications

• F03G6/071

  with energy storage devices · CPC title

• F03G6/064

  having a gas turbine cycle, i.e. compressor and gas turbine combination · CPC title

• C01G51/82

  Compounds containing cobalt, with or without oxygen or hydrogen, and containing two or more other elements · CPC title

• C01G45/125 Primary

  of the type (MnO3)n-, e.g. CaMnO3 · CPC title

• C01P2002/76

  by a space-group or by other symmetry indications · CPC title