# US 4,399,203 A · Sulfide and selenide compositions

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- Number: US 4,399,203 A
- Document ID: US4399203A
- Status: Granted
- Kind: A
- Application number: 06/368,789
- Filed: 1982-04-15
- Granted: 1983-08-16
- Earliest claimed: 1982-04-15
- Assignees: The Standard Oil Company
- Inventors: Phillip D. Bennett
- Web page: https://patentgrep.com/patent/US4399203A

## CPC

- H01M 6/18: with solid electrolyte
- C01B 19/007: {Tellurides or selenides of metals (C01B19/002 takes precedence)}
- H01M: PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- C01B: NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; {METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C}

## Abstract

Novel sulfide, polysulfide, selenide and polyselenide compositions are provided which are useful as ionic conducting solid electrolytes. Electrical energy storage devices utilizing such electrolytes are also provided.

## Claims

### Claim 1

A composition of the formula:
[AlYZ.sub.2 ].sub.n [A.sub.a Cs.sub.b ].sub.n (I)
wherein:
Y is selected from the group consisting of S and Se;
Z is selected from the group consisting of Cl, Br and I or combinations thereof;
A is selected from the group consisting of Li, Na or K or combinations thereof;
n is a positive integer;
a is a number greater than 0.1,
b is a number greater than 0.01 and the sum of a+b equals 1.

### Claim 2

An ionic conducting solid electrolyte comprising a composition of the formula:
[AlYZ.sub.2 ].sub.n [A.sub.a Cs.sub.b ].sub.n (I)
wherein:
Y is selected from the group consisting of S and Se;
Z is selected from the group consisting of Cl, Br and I or combinations thereof;
A is selected from the group consisting of Li, Na or K or combinations thereof;
n is a positive integer or a combination thereof;
a is a number greater than 0.1,
b is a number greater than 0.01 and the sum of a+b equals 1.

### Claim 3 (depends on 1, 2)

The composition of claims 1 or 2 wherein Y is S.

### Claim 4 (depends on 1, 2)

The composition of claims 1 or 2 wherein Z is Cl.

### Claim 5 (depends on 1, 2)

The composition of claims 1 or 2 wherein A is Li.

### Claim 6

An electrical energy storage device comprising:
(a) a housing;
(b) at least two electrodes, including a positive electrode and a negative electrode, positioned within said housing; and,
(c) an ionic conducting solid electrolyte disposed between and electrically contacting said electrodes; and wherein said ionic conducting solid electrolytes comprises a composition of the formula:
[AlYZ.sub.2 ].sub.n [A.sub.a Cs.sub.b ] (I)
wherein
Y is selected from the group consisting of S and Se;
Z is selected from the group consisting of Cl, Br and I or combinations thereof;
A is selected from the group consisting of Li, Na or K or combinations thereof;
n is a positive integer;
a is a number greater than 0.1,
b is a number greater than 0.01 and the sum of a+b equals 1.

### Claim 7 (depends on 6)

The electrical energy storage device of claim 6 further comprising a first current carrier electrically connected to the positive electrode and a second current carrier electrically connected to the negative electrode.

### Claim 8 (depends on 6)

The electrical energy storage device of claim 6 wherein Y in formula (I) is S.

### Claim 9 (depends on 6)

The electrical energy storage device of claim 6 wherein Z in formula (I) is Cl.

### Claim 10 (depends on 6)

The electrical energy storage device of claim 6 wherein A in formula (I) is Li.