# US 8,785,055 B2 · Ionic liquid batteries

> Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt

- Number: US 8,785,055 B2
- Document ID: US8785055B2
- Status: Granted
- Kind: B2
- Application number: 12/924,033
- Filed: 2010-09-07
- Published: 2013-12-26
- Granted: 2014-07-22
- Earliest claimed: 2009-09-14
- Assignees: The United States of America as represented by the Secretary of the Navy
- Applicants: Thomas E. Sutto
- Inventors: Thomas E. Sutto
- Web page: https://patentgrep.com/patent/US8785055B2

## CPC

- H01M 10/0566: Liquid materials
- H01M 4/42: Alloys based on zinc
- H01M 4/46: Alloys based on magnesium or aluminium
- H01M 4/48: of inorganic oxides or hydroxides
- H01M 10/36: Accumulators not provided for in groups H01M10/05-H01M10/34
- H01M 2300/0025: Organic electrolyte
- 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

Novel electric battery systems are disclosed utilizing selected ionic liquids as electrolytes and selected metals and metal oxides as electrodes. The ionic liquids utilize a substituted imidazolium cation, which does not have the corrosive safety and environmental concerns associated with corrosive acid and alkali electrolytes.

## Claims

### Claim 1

A lithium-free battery consisting essentially of:
(a) an anode consisting essentially of one of zinc (Zn), manganese (Mn), aluminum (Al), and lead (Pb);
(b) a cathode consisting essentially of a metal oxide selected from the group consisting of MnO2, PbO2, NiO, and Ag2O; and
(c) an ionic liquid electrolyte consisting essentially of an imidazolium cation as:
wherein each R independently is H or a halogen; R1 and R2 independently are one of hydrogen (H), a halogen, and CH3; and R3 is an aliphatic moiety of formula CnAm with n≧1 and m≧n,
wherein each A independently is one of H and a halogen of Group 17 (IUPAC designation) elements, and
wherein lithium (Li) is excluded among all of said anode, said cathode and said electrolyte.

### Claim 2 (depends on 1)

The battery according to claim 1, wherein said ionic liquid further comprises an anion, said anion being a mineral acid anion.

### Claim 3 (depends on 2)

The battery according to claim 2, wherein said anion is selected from the group consisting of hydrogen sulfate, nitrate, dihydrogen phosphate, and magnesium phosphate.

### Claim 4 (depends on 1)

The battery according to claim 1, wherein said ionic liquid further comprises polyvinyl alcohol.

### Claim 5 (depends on 2)

The battery according to claim 2, wherein said anode comprises zinc, said cathode comprises one of PbO2 and MnO2, and said anion comprises hydrogen sulfate.

### Claim 6 (depends on 5)

The battery according to claim 5, wherein said cation is 1-ethyl-3-methyl imidazolium.