# US 5,352,546 A · High rate electrochemical cell

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- Number: US 5,352,546 A
- Document ID: US5352546A
- Status: Granted
- Kind: A
- Application number: 08/029,080
- Filed: 1993-03-10
- Granted: 1994-10-04
- Earliest claimed: 1993-03-10
- Assignees: Alliant Techsystems Inc.
- Inventors: David L. Chua; Hsiu-Ping Lin; Rebecca A. Smith
- Web page: https://patentgrep.com/patent/US5352546A

## CPC

- H01M 10/0563: Liquid materials, e.g. for Li-SOCl2 cells
- H01M 6/50: Methods or arrangements for servicing or maintenance, e.g. for maintaining operating temperature (constructional details of current conducting connections for detecting conditions inside cells or batteries, e.g. details of voltage sensing terminals, H01M50/569)
- 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

An active metal non-aqueous electrochemical cell includes an anode selected from lithium metal and intercalated lithium compounds, an electrolyte system consisting essentially of an SO.sub.2 solvent containing an amount of electrolyte salt, and a solid liquid or gaseous cathode active material selected from a class of materials which are reduced in preference to SO.sub.2, wherein the amount of cathode material is generally limiting with respect to the desired discharge reaction.

## Claims

### Claim 1

A non-aqueous electrochemical cell comprising:
(a) an anode selected from lithium metal and intercalated lithium compounds;
(b) an electrolyte system including SO.sub.2 solvent containing electrolyte salt;
(c) a liquid or gaseous cathode material that is reduced in preference to SO.sub.2, selected from the group consisting of oxyhalides including SO.sub.2 Cl.sub.2 and SOCl.sub.2, wherein the amount of cathode material is such that it is essentially consumed during a designed normal cell discharge reaction cycle in a manner that renders the cell cathode-limited.

### Claim 2 (depends on 1)

The electrochemical call of claim 1 wherein the cathode material is selected from the group consisting of SO.sub.2 Cl.sub.2 and SOCl.sub.2.

### Claim 3 (depends on 1)

The electrochemical cell of claim 1 further comprising additional dopant materials in the electrolyte solution selected from halogen and interhalogen compounds.

### Claim 4 (depends on 2)

The electrochemical cell of claim 2 further comprising additional dopant materials in the electrolyte solution selected from halogen and interhalogen compounds.

### Claim 5 (depends on 1)

The electrochemical cell of claim 1 wherein the electrolyte salt is selected form LiAlCl.sub.4, LiBr, LiASF.sub.6, LiBF.sub.4, or combinations thereof.

### Claim 6 (depends on 4)

The electrochemical cell of claim 4 wherein the electrolyte salt is selected form LiAlCl.sub.4, LiBr, LiASF.sub.6, LiBF.sub.4, or combinations thereof.

### Claim 7 (depends on 1)

The electrochemical cell of claim 1 wherein the cell is a reserve cell.

### Claim 8

A non-aqueous electrochemical cell comprising:
(a) an anode including lithium or a reversible lithium intercalation material;
(b) an electrolyte system including SO.sub.2 solvent and an electrolyte salt selected from the group consisting of lithium salts and combinations thereof;
(c) a solid cathode reactant material that is reduced in preference to SO.sub.2 and selected from the group consisting of Li.sub.x CoO.sub.2 (0.4.ltoreq..times..ltoreq.1.0), LINiO.sub.2, V.sub.2 O.sub.5, a transition metal oxide, or any lithiated manganese dioxide material, wherein the amount of cathode material is such that it is essentially consumed during a designed normal cell discharge reaction cycle in a manner that renders the cell cathode-limited.

### Claim 9 (depends on 8)

The electrochemical cell of claim 8 wherein the cell is a reserve cell.