# US 10,312,515 B2 · Lithium sulfur cell with dopant

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- Number: US 10,312,515 B2
- Document ID: US10312515B2
- Status: Granted
- Kind: B2
- Application number: 15/451,356
- Filed: 2017-03-06
- Published: 2017-09-07
- Granted: 2019-06-04
- Earliest claimed: 2016-03-07
- Assignees: Robert Bosch GmbH
- Applicants: Robert Bosch GmbH
- Inventors: John F. Christensen; Boris Kozinsky; Aleksandar Kojic
- Web page: https://patentgrep.com/patent/US10312515B2

## CPC

- H01M 4/5815: {Sulfides}
- H01M 4/366: {as layered products}
- H01M 4/38: of elements or alloys
- H01M 4/382: {Lithium (H01M4/405 takes precedence)}
- H01M 4/388: {Halogens}
- H01M 4/58: of inorganic compounds other than oxides or hydroxides, e.g. sulfides, selenides, tellurides, halogenides or LiCoFy; of polyanionic structures, e.g. phosphates, silicates or borates
- H01M 4/581: {Chalcogenides or intercalation compounds thereof}
- H01M 4/582: {Halogenides}
- H01M 10/052: Li-accumulators
- H01M 2004/028: {Positive electrodes}
- H01M 2220/20: Batteries in motive systems, e.g. vehicle, ship, plane
- 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

Among other things, the present disclosure provides a particle comprising a form of sulfur and/or lithium sulfide (Li2S) that is doped with a group VIA element, such as selenium (e.g. Se34), tellurium (e.g. Te52), or polonium (e.g. Po84). The present disclosure also provides a cell comprising a negative electrode, a separator, and a positive electrode comprising the particles of the present disclosure.

## Claims

### Claim 1

A particle comprising Li2S1−x−ySexMy,
wherein M is a Group VIA element, x<0.1, y<0.05, at least one of Se or M is present, and M is not S.

### Claim 2 (depends on 1)

The particle of claim 1, further comprising a coating around the particle.

### Claim 3 (depends on 1)

The particle of claim 1, wherein M is Te or Po.

### Claim 4 (depends on 1)

The particle of claim 1, wherein the coating is a mixed electronic and Li+ conductor.

### Claim 5 (depends on 4)

The particle of claim 4, wherein the coating is carbon or Ti2S.

### Claim 6 (depends on 1)

The particle of claim 1, wherein the coating is an insulator.

### Claim 7 (depends on 6)

The particle of claim 6, wherein the coating is Al2O3.

### Claim 8 (depends on 1)

A lithium-sulfur cell comprising:
(a) a negative electrode;
(b) a separator; and
(c) a positive electrode comprising the particle of claim 1.

### Claim 9 (depends on 8)

The lithium-sulfur cell of claim 8, wherein the particle is present in an amount of at least about 40 volume % of the positive electrode.

### Claim 10 (depends on 8)

The lithium-sulfur cell of claim 8, wherein the positive electrode is more than about 30 microns thick.