all-solid-state cell

Patent metadata

Field	Value
Publication number	US-2015044576-A1
Application number	US-201314381864-A
Country	US
Kind code	A1
Filing date	Jan 24, 2013
Priority date	Feb 29, 2012
Publication date	Feb 12, 2015
Grant date	—

Abstract

An all-solid-state cell, which includes a lithium-containing anode, a cathode and a lithium ions-conducting solid-state electrolyte separator situated between the anode and the cathode. To improve the safety and cycle stability of the cell, the cathode includes a composite material including at least one lithium titanate and at least one lithium ions-conducting solid-state electrolyte. Furthermore, the invention relates to a corresponding all-solid-state battery and a mobile or stationary system equipped with it.

First claim

1 - 11 . (canceled)

12 . An all-solid-state cell, comprising:
a lithium-containing anode; a cathode; and a lithium ions-conducting solid-state electrolyte separator situated between the anode and the cathode; wherein the cathode includes a composite material which includes at least one lithium titanate and at least one lithium ions-conducting solid-state electrolyte.

13 . The all-solid-state cell of claim 12 , wherein the composite material includes a copper-doped and/or iron-doped lithium titanate.

14 . The all-solid-state cell of claim 12 , wherein the composite material includes a lithium-inserted lithium titanate.

15 . The all-solid-state cell of claim 12 , wherein the composite material includes a lithium titanate calcined in a reducing atmosphere.

16 . The all-solid-state cell of claim 12 , wherein the composite material includes at least one lithium titanate which is based on the general chemical formula:
Li 4+x−y−z Fe 3y Cu z Ti 5−2y−m (Nb,Ta) m O 12 ,
where
0≦x≦3,
0≦y≦1,
z≧0, and
0≦m≦0.1,
where z>0 and/or y>0 and/or x>0 and/or the lithium titanate is calcined in a reducing atmosphere.

17 . The all-solid-state cell of claim 12 , wherein the composite material includes lithium titanate-containing particles, which are partially or completely coated with the at least one lithium ions-conducting solid-state electrolyte.

18 . The all-solid-state cell of claim 12 , wherein the at least one lithium ions-conducting solid-state electrolyte is from at least one of lithium sulfide-phosphorus sulfides, lithium lanthanum zirconates, lithium niobates, and mixtures of them and layer systems thereof.

19 . The all-solid-state cell of claim 12 , wherein the solid-state electrolyte separator includes at least one lithium sulfide-phosphorus sulfide and/or at least one lithium lanthanum zirconate.

20 . The all-solid-state cell of claim 12 , wherein the anode is formed from metallic lithium.

21 . An all-solid-state battery, comprising:
at least one all-solid-state cell, wherein the all-solid-state cell includes:
a lithium-containing anode;
a cathode; and
a lithium ions-conducting solid-state electrolyte separator situated between the anode and the cathode;
wherein the cathode includes a composite material which includes at least one lithium titanate and at least one lithium ions-conducting solid-state electrolyte.

22 . A system, comprising:
at least one of a mobile system, a stationary system, a vehicle, an energy storage system, a power tool, an electrical garden tool, and an electronic device; and at least one all-solid-state cell, wherein the all-solid-state cell includes:
a lithium-containing anode;
a cathode; and
a lithium ions-conducting solid-state electrolyte separator situated between the anode and the cathode;
wherein the cathode includes a composite material which includes at least one lithium titanate and at least one lithium ions-conducting solid-state electrolyte.

23 . The all-solid-state cell of claim 12 , wherein the composite material includes at least one lithium titanate which is based on the general chemical formula:
Li 4+x−y−z Fe 3y Cu z Ti 5−2y−m (Nb,Ta) m O 12 ,
where
0≦x≦3,
0≦y≦1, where 0.2≦y≦1,
z≧0, and
0≦m≦0.1,
where z>0 and/or y>0 and/or x>0 and/or the lithium titanate is calcined in a reducing atmosphere.

24 . The all-solid-state cell of claim 12 , wherein the composite material includes at least one lithium titanate which is based on the general chemical formula:
Li 4+x−y−z Fe 3y Cu z Ti 5−2y−m (Nb,Ta) m O 12 ,
where
0≦x≦3,
0≦y≦1,
z≧0, where 0≦z≦0.2, and
0≦m≦0.1,
where z>0 and/or y>0 and/or x>0 and/or the lithium titanate is calcined in a reducing atmosphere.

Assignees

• Bosch Gmbh Robert

Inventors

• Eisele Ulrich
• Logeat Alan
• Ogihara Hideki

Classifications

• H01M4/366 Primary

  as layered products · CPC title

• H01M10/0562

  Solid materials · CPC title

• H01M4/485

  of mixed oxides or hydroxides for inserting or intercalating light metals, e.g. LiTi2O4 or LiTi2OxFy (H01M4/505, H01M4/525 take precedence) · CPC title

• H01M4/382

  Lithium (H01M4/405 takes precedence) · CPC title

• H01M10/0525

  Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries · CPC title