Thermoelectric materials based on tetrahedrite structure for thermoelectric devices

Patent metadata

Field	Value
Publication number	US-9673369-B2
Application number	US-201314413196-A
Country	US
Kind code	B2
Filing date	Jul 3, 2013
Priority date	Jul 6, 2012
Publication date	Jun 6, 2017
Grant date	Jun 6, 2017

Abstract

Thermoelectric materials based on tetrahedrite structures for thermoelectric devices and methods for producing thermoelectric materials and devices are disclosed.

First claim

What is claimed is:

1. A thermoelectric device comprising:
a pair of conductors; and
a layer of tetrahedrite disposed between the pair of conductors, wherein the layer of tetrahedrite comprises Cu 12-x M x Sb 4 S 13 ; with M being selected from the group consisting of Zn at a concentration 0<x<2.0, Fe at a concentration between 0<x<1.5, and combinations thereof.

2. A thermoelectric device comprising:
a pair of conductors; and
a layer of tetrahedrite disposed between the pair of conductors, wherein
the layer of tetrahedrite comprises one of Cu, M, Sb, and S where M is a transition metal with appropriate brillouin zone occupation factor of less than 0.8, wherein the layer of tetrahedrite comprises Cu 12-x M x Sb 4 S 13 ; with M being selected from the group of Zn at a concentration 0<x<2.0, Fe at a concentration between 0<x<1.5, and combinations thereof.

3. A thermoelectric device comprising:
a pair of conductors; and
a layer of tetrahedrite disposed between the pair of conductors, wherein the layer of tetrahedrite comprises one of Cu, M, Sb, and S where M is a transition metal with appropriate brillouin zone occupation factor of less than 0.8, wherein the tetrahedrite is a sintered powder having a density of greater than about 95%.

4. A thermoelectric device comprising:
a pair of conductors; and
Cu 12-x M x Sb 4 S 13 disposed between the conductors where M is selected from the group Zn, Fe, and Mn and wherein 0<x<2.0, wherein Mx is Zn 2-x and x<2.

5. A thermoelectric device comprising:
a pair of conductors; and
Cu 12-x M x Sb 4 S 13 disposed between the conductors, where M is selected from the group Zn, Fe, and Mn and wherein 0<x<2.0, wherein Mx is Fe 2-x and x<2.

6. A thermoelectric device comprising:
a pair of conductors; and
Cu 12-x M x Sb 4 S 13 disposed between the conductors, where M is selected from the group Zn, Fe, and Mn and wherein 0<x<2.0, wherein M is one of Zn and Fe.

7. A method of producing a thermoelectric device comprising:
creating tetrahedrite comprising Cu 12-x M x Sb 4 S 13 wherein M is selected from the group of Zn at a concentration 0<x<2.0, Fe at a concentration 0<x<1.5, and combinations thereof;
grinding the tetrahedrite;
hot pressing the ground tetrahedrite to form a pellet; and
placing the pellet between a pair of electrical conductors.

8. The method according to claim 7 wherein creating tetrahedrite comprising Cu 12-x M x Sb 4 S 13 comprises sintering a stoichiometric mixture of Cu, Sb, S and one of Zn and Fe particles.

9. A method of producing a thermoelectric device comprising:
creating tetrahedrite comprising Cu 12-x M x Sb 4 S 13 wherein M is selected from the group of Zn at a concentration 0<x<2.0, Fe at a concentration 0<x<1.5, and combinations thereof;
grinding the tetrahedrite;
hot pressing the ground tetrahedrite to form a pellet; and
placing the pellet between a pair of electrical conductors, wherein hot pressing the ground tetrahedrite to form a pellet is hot pressing the ground tetrahedrite to form a pellet to a density of greater than 95%.

Assignees

• Univ Michigan State
• Univ California

Inventors

• Morelli Donald T
• Lu Xu
• Ozolins Vidvuds

Classifications

• C04B2235/81

  Materials characterised by the absence of phases other than the main phase, i.e. single phase materials · CPC title

• C04B2235/80

  Phases present in the sintered or melt-cast ceramic products other than the main phase · CPC title

• C04B2235/662

  Annealing after sintering · CPC title

• C04B2235/6567

  Treatment time · CPC title

• C04B2235/6565

  Cooling rate · CPC title