Inorganic solid electrolyte glass phase composite and a battery containing an inorganic solid electrolyte glass phase composite

• US 8,865,354 B2
• Filed: 03/29/2011
• Issued: 10/21/2014
• Est. Priority Date: 03/30/2010
• Status: Active Grant

• Current Assignee: West Virginia University
• Original Assignee: West Virginia University
• Inventors: Zhang, Hui, Jiang, Yinglu, Liu, Xingbo
• Primary Examiner(s): Enin-Okut, Edu E
• Application Number:
  US13/074,335
• Publication Number:
  US 20110318650A1
• Time in Patent Office: 1,302 Days
• Field of Search: 429/304, 429/322, 252/62.2
• US Class Current: 429/322
• CPC Class Codes: H01M 10/0525 Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries
• CPC Class Codes: H01M 10/0562 Solid materials
• CPC Class Codes: H01M 2300/0068 inorganic
• CPC Class Codes: H01M 2300/0071 Oxides
• CPC Class Codes: Y02E 60/10 Energy storage using batteries

Abstract

An inorganic solid electrolyte glass phase composite is provided comprising a substance of the general formula La_2/3-xLi_3xTiO₃ wherein x ranges from about 0.04 to about 0.17, and a glass material. The glass material is one or more compounds selected from Li₂O, Li₂S, Li₂SO₄, Li₃PO₄, B₂O₃, P₂O₅, P₂O₃, Al₂O₃, SiO₂, CaO, MgO, BaO, TiO₂, GeO₂, SiS₂, Sb₂O₃, SnS, TaS₂, P₂S₅, B₂S₃, and a combination of two or more thereof. A lithium-ion conducting solid electrolyte composite is disclosed comprising a lithium-ion conductive substance of the general formula La_2/3-xLi_3xTiO₃—Z wherein x ranges form about 0.04 to 0.17, and wherein “Z” is the glass material identified above. A battery is disclosed having at least one cathode and anode and an inorganic solid electrolyte glass phase composite as described above disposed on or between at least one of the cathode and the anode.

Claims

1. An inorganic solid electrolyte composite comprising:

La_2/3-xLi_3xTiO₃ wherein x ranges from about 0.04 to about 0.17, and a glass material comprising B₂O₃ forming an inorganic solid electrolyte glass composite having a modified grain boundary of rounded non-cubic shaped grains and a grain boundary conductivity greater than about 9.03×

10<sup>−

6</sup> S cm<sup>−

1</sup>.

2. The inorganic solid electrolyte composite of claim 1 wherein the molar ratio of said La_2/3-xLi_3xTiO₃ to said glass material ranges from about 1:

1 to about 1000;

1.

3. The inorganic solid electrolyte composite of claim 1 that is in a powder form, a film, or a sheet.

4. A lithium-ion conducting solid electrolyte composite comprising:

a lithium-ion conductive substance of the general formula La_2/3-xLi_3xTiO₃—

Z wherein x ranges from about 0.04 to 0.17, and wherein “

Z”

is a glass material comprising B₂O₃ that is a solid electrolyte glass composite having a modified grain boundary of rounded non-cubic shaped grains and a grain boundary conductivity greater than about 9.03×

10<sup>−

6</sup> S cm<sup>−

1</sup>.

5. The lithium-ion conducting solid electrolyte of claim 4 wherein the molar ratio of said La_2/3-xLi_3xTiO₃ to said “

Z”

glass material ranges from about 1;

1 to about 1000;

1.

6. A battery comprising:

at least one cathode;

at least one anode; and

an inorganic solid electrolyte composite disposed on or between the cathode and the anode, the inorganic solid electrolyte composite comprising a substance having the general formula La_2/3-xLi_3xTiO₃ wherein x ranges from about 0.04 to about 0.17, and a glass material comprising B₂O₃ forming an inorganic solid electrolyte glass composite having a modified grain boundary of rounded non-cubic shaped grains and a grain boundary conductivity greater than about 9.03×

10<sup>−

6</sup> S cm<sup>−

1</sup>.

7. The battery of claim 6 wherein said inorganic solid electrolyte composite of has a molar ratio of said La_2/3-xLi_3xTiO₃ to said glass material-ranging from about 1:

1 to about 1000;

1.

8. A method of producing an inorganic solid electrolyte composite comprising:

preparing a powder having a composition of La_2/3-xLi_3xTiO₃ by a solid state reaction wherein x ranges from about 0.04 to about 0.17;

incorporating a glass material that is B₂O₃ into said La_2/3-xLi_3xTiO₃ powder resulting in a molar ratio of said La_2/3-xLi_3xTiO₃ to said glass material in the range of from about 1;

1 to about 1000;

1; and

performing a powder compacting technique on the La_2/3-xLi_3xTiO₃/glass material to form an inorganic solid electrolyte glass composite having a modified grain boundary of rounded non-cubic shaped grains and a grain boundary conductivity greater than about 9.03×

10<sup>−

6</sup> S cm<sup>−

1</sup>.

9. The method of producing an inorganic solid electrolyte composite of claim 8 wherein the powder compacting technique comprises one or more of tape casting, pressing, or sintering.

10. The method of producing an inorganic solid electrolyte composite of claim 8 wherein the powder compacting technique produces said inorganic solid electrolyte in a powder form, a film, or a sheet.