# US 11,444,348 B2 · Lithium air battery and method of preparing the same

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- Number: US 11,444,348 B2
- Document ID: US11444348B2
- Status: Granted
- Kind: B2
- Application number: 16/827,747
- Filed: 2020-03-24
- Published: 2020-07-16
- Granted: 2022-09-13
- Earliest claimed: 2014-08-27
- Assignees: Samsung Electronics Co., Ltd.
- Applicants: Samsung Electronics Co., Ltd.
- Inventors: Taeyoung Kim; Dongjoon Lee; Heungchan Lee; Dongmin Im; Wonsung Choi
- Web page: https://patentgrep.com/patent/US11444348B2

## CPC

- H01M 12/08: composed of a half-cell of a fuel-cell type and a half-cell of the secondary-cell type
- H01M 4/8647: {consisting of more than one material, e.g. consisting of composites}
- H01M 50/431: Inorganic material
- H01M 50/46: Separators, membranes or diaphragms characterised by their combination with electrodes
- H01M 4/382: {Lithium (H01M4/405 takes precedence)}
- H01M 10/056: characterised by the materials used as electrolytes, e.g. mixed inorganic/organic electrolytes
- H01M 50/454: comprising a non-fibrous layer and a fibrous layer superimposed on one another
- H01M 2300/0065: Solid electrolytes
- H01M 2300/0068: inorganic
- H01M 2300/0094: in the form of layered products, e.g. coatings
- Y02E 60/10: Energy storage using batteries
- H01M: PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- Y02E: REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION

## Abstract

A lithium air battery including a composite cathode including a porous material and a first solid electrolyte; a lithium metal anode; an oxygen blocking layer adjacent to the anode; and a cathode interlayer disposed between the cathode and the oxygen blocking layer, wherein the cathode interlayer includes a lithium ion conducting second solid electrolyte.

## Claims

### Claim 1

A lithium air battery comprising:
a composite cathode comprising a porous material and a first solid electrolyte;
a lithium metal anode;
an oxygen blocking layer adjacent to the anode; and
a cathode interlayer disposed between the cathode and the oxygen blocking layer,
wherein the cathode interlayer comprises a lithium ion conductive second solid electrolyte and wherein a thickness of the cathode interlayer is less than a thickness of each of the composite cathode and the oxygen blocking layer, and
wherein the first solid electrolyte comprises an inorganic electrolyte, an organic-inorganic composite electrolyte, or a combination thereof.

### Claim 2 (depends on 1)

The lithium air battery of claim 1, wherein the cathode interlayer does not comprise a gel.

### Claim 3 (depends on 1)

The lithium air battery of claim 1, wherein the cathode interlayer is non-porous.

### Claim 4 (depends on 1)

The lithium air battery of claim 1, wherein a thickness of the cathode interlayer is about 200 nm to about 5 μm.

### Claim 5 (depends on 1)

The lithium air battery of claim 1, wherein a thickness of the cathode interlayer is 50 μm or less.

### Claim 6 (depends on 1)

The lithium air battery of claim 1, wherein the second solid electrolyte comprises an inorganic electrolyte, an organic-inorganic composite electrolyte, or a combination thereof.

### Claim 7 (depends on 1)

The lithium air battery of claim 1, wherein the second solid electrolyte and the first solid electrolyte comprise a same solid electrolyte.

### Claim 8 (depends on 1)

The lithium air battery of claim 1, wherein the inorganic electrolyte comprises a glassy electrolyte, an amorphous electrolyte, a ceramic electrolyte, a glass-ceramic electrolyte, or a combination thereof.

### Claim 9 (depends on 1)

The lithium air battery of claim 1, wherein the inorganic electrolyte comprises Cu3N, LiN, LiPON (Lithium phosphorous oxynitride), Li3PO4.Li2S.SiS2, Li2S.GeS2.Ga2S3, Li2O.11Al2O3, Na2O.11Al2O3, (NazLi1−z)1+xTi2−xAlx(PO4)3 wherein 0.1≤x≤0.9 and 0≤z≤1, Li1+x′,Hf2−x′Alx′(PO4)3 wherein 0.1≤x′≤0.9, Na3Zr2Si2PO12, Li3Zr2Si2PO12, Na5ZrP3O12, Na5TiP3O12, Na3Fe2P3O12, Na4NbP3O12, a sodium silicate, Li0.3La0.5TiO3, Na5MSi4O12 wherein M is a rare earth element, Li5ZrP3O12, Li5TiP3O12, Li3Fe2P3O12, Li4NbP3O12, Li1+x″(M′Alz′Ga1−z′)x″(Ge1−yTiy)2−X″(PO4)3 wherein 0≤x″≤0.8, 0≤y≤1.0, 0≤z′≤1, and M′ is Nd, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb, or a combination thereof, Li1+q+y′QqTi2−qSiy′P3−y′O12 wherein 0<q≤0.4, 0<y′≤0.6, and Q is Al or Ga, Li6BaLa2Ta2O12, Li7La3Zr2O12, Li5La3Nb2O12, Li5La3M2O12 wherein M is Nb or Ta, Li7+rArLa3−rZr2O12 wherein 0<r<3, and A is Zn, or a combination thereof.

### Claim 10 (depends on 1)

The lithium air battery of claim 1, wherein the organic-inorganic electrolyte comprises an ion conducting polymer, a polymeric ionic liquid, inorganic electrolyte, or a combination thereof.

### Claim 11 (depends on 1)

The lithium air battery of claim 1, wherein a weight ratio of the porous material to the first solid electrolyte is in a range of about 1:2 to about 1:5.

### Claim 12 (depends on 1)

The lithium air battery of claim 1, wherein the oxygen blocking layer is impervious to oxygen.

### Claim 13 (depends on 12)

The lithium air battery of claim 12, wherein the oxygen blocking layer is a solid electrolyte layer comprising a crystalline lithium ion conducting compound.

### Claim 14 (depends on 13)

The lithium air battery of claim 13, wherein an amount of the crystalline lithium ion conducting compound is about 50 wt % or more, based on the total weight of the solid electrolyte layer.

### Claim 15 (depends on 13)

The lithium air battery of claim 13, wherein the crystalline lithium ion conducting compound comprises Li3N, Li2+2nZn1−nGeO4 wherein 0≤n≤1, La0.55Li0.35TiO3, LiTi2P3O12, Li1+x+y(AlzGa1−z)x″(TiyGe1−y)2−x″Siy′P3−y′O12 wherein 0≤z≤1, 0≤y≤1, 0≤x″≤1′, 0≤y′≤1, 0≤x≤0.4 and 0<y≤0.6, a lithium-aluminum-germanium-phosphate, a lithium-aluminum-titanium-phosphate, a lithium-aluminum-titanium-silicon-phosphate, Li1+x+yAlxTi2−xSiyP3−yO12 wherein 0≤x≤1 and 0≤y≤1, Li1+x+yAlxTi2−xSiyP3−yO12 wherein 0≤x≤1 and 0≤y≤1, Li1+x+yAlx(TipGe1−p)2−xSiyP3−yO1 wherein 0≤p≤1, 0≤x≤2, and 0≤y≤3, or a combination thereof.

### Claim 16 (depends on 1)

The lithium air battery of claim 1, further comprising an anode interlayer between the anode and the oxygen blocking layer, wherein the anode interlayer comprises a third solid electrolyte.

### Claim 17 (depends on 1)

The lithium air battery of claim 1, wherein the cathode interlayer consists of the lithium ion conductive second solid electrolyte and is in the form of a layer between the cathode and the oxygen blocking layer.