Quaternary vitreous solid lithium cation conductive electrolyte

Claim 2

A quaternary solid state electrolyte having a vitreous lithium cation conductor of the composition: aX, bLi.sub.2 S, Y, Z where X is selected from the group consisting of P 2 S 5 and SiS 2 ; a is from about 0.5 to about 2; b is from 0.25 to 2; Y is an oxygen-containing lithium compound selected from the group consisting of Li 4 SiO 4 , Li 2 CO 3 and Li 2 SiO 3 ; Z is a dopant selected from the group consisting of LiI, LiBr, LiCl and LiF; and wherein said composition has a conductivity of at least 0.75×10 -4 ohm -1 cm -1 at 25° C.

Claim 3

The solid state electrolyte of claim 1 wherein X is SiS 2 .

Claim 4

The solid state electrolyte of claim 1 wherein X is P 2 S 5 .

Claim 5

The solid state electrolyte of claim 1 or 2 wherein the quaternary vitreous lithium cation conductor is Li 2 SiS 3 .0.25LiBr.0.1875Li 2 CO 3 .

Claim 6

The solid state electrolyte of claim 1 or 2 wherein the quaternary vitreous lithium cation conductor is Li 2 SiS 3 .0.5LiBr.0.375 Li 2 CO 3 .

Claim 7

The solid state electrolyte of claim 1 or 2 wherein the quaternary vitreous lithium cation conductor is Li 2 SiS 3 .0.25LiI.0.375 Li 2 CO 3 .

Claim 8

A solid state cell comprising an anode, a cathode and a quaternary vitreous lithium cation conductor of the composition: aX, bLi.sub.2 S, Y, Z where X is selected from the group consisting of P 2 S 5 and SiS 2 ; a is from about 0.5 to about 2; b is from 0.25 to 2; Y is an oxygen-containing lithium compound selected from the group consisting of Li 2 SiO 3 , Li 2 CO 3 and Li 4 SiO 4 ; Z is a dopant selected from the group consisting of LiI, LiBr, LiCl and LiF; and wherein said composition has a conductivity of at least 0.75×10 -4 ohm -1 cm -1 at 25° C.

Claim 9

A solid state cell comprising an anode, a cathode and a quaternary vitreous lithium cation conductor of the composition: aX, bLi.sub.2 S, Y, Z where X is selected from the group consisting of P 2 S 5 and SiS 2 ; a is from about 0.5 to about 2; b is from 0.25 to 2; Y is an oxygen-containing lithium compound selected from the group consisting of Li 2 SiO 3 , Li 2 CO 3 and Li 4 SiO 4 ; Z is a dopant selected from the group consisting of LiI, LiBr, LiCl and LiF; and wherein said composition has a conductivity of at least 0.75×10 -4 ohm -1 cm -1 at 25° C.

Claim 10

The solid state cell of claim 7 wherein X is P 2 S 5 .

Claim 11

The solid state cell of claim 7 wherein X is SiS 2 .

Claim 12

The solid state cell of claim 7 wherein the vitreous lithium cation conductor is Li 2 SiS 3 .0.25LiBr.0.1875Li 2 CO 3 .

Claim 13

The solid state cell of claim 7 wherein the vitreous lithium cation conductor is Li 2 SiS 3 .0.5LiBr.0.375Li 2 CO 3 .

Claim 14

The solid state cell of claim 7 wherein the vitreous lithium cation conductor is Li 2 SiS 3 .0.25LiI.0.375Li 2 CO 3 .

Claim 15

The solid state cell of claim 7 wherein the anode is selected from the group consisting of lithium, lithium alloys, sodium, potassium, rubidium, and silver.

Claim 16

The solid state cell of claim 7 wherein the cathode is selected from the group consisting of TiS 2 , MoS 3 , PVP+I 2 , PVP+I+TiS 2 , TiS 2 +MoS 3 , FeS 2 , Sb 2 S 3 , and MnO 2 .

Claim 17

The solid state cell of claim 7 wherein the anode is lithium, and the cathode is TiS 2 .

Claim 18

The solid state cell of claim 7 wherein the anode is lithium and the cathode is TiS 2 +MoS 3 .