# US 10,374,234 B2 · Current collectors for improved safety

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- Number: US 10,374,234 B2
- Document ID: US10374234B2
- Status: Granted
- Kind: B2
- Application number: 15/809,650
- Filed: 2017-11-10
- Published: 2018-03-08
- Granted: 2019-08-06
- Earliest claimed: 2015-12-01
- Assignees: UT-Battelle, LLC
- Applicants: Ut-Battelle, LLC
- Inventors: Michael Naguib Abdelmalak; Srikanth Allu; Nancy J. Dudney; Jianlin Li; Srdjan Simunovic; Hsin Wang
- Web page: https://patentgrep.com/patent/US10374234B2

## CPC

- H01M 4/70: characterised by shape or form
- H01M 4/13: Electrodes for accumulators with non-aqueous electrolyte, e.g. for lithium-accumulators; Processes of manufacture thereof
- H01M 4/661: {Metal or alloys, e.g. alloy coatings (H01M4/669 take precedence)}
- H01M 4/667: {in the form of layers, e.g. coatings}
- H01M 10/0525: Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries
- H01M 10/4235: {Safety or regulating additives or arrangements in electrodes, separators or electrolyte (H01M10/4242 takes precedence)}
- H01M 2004/027: {Negative electrodes}
- H01M 2004/028: {Positive electrodes}
- 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

A battery electrode assembly includes a current collector with conduction barrier regions having a conductive state in which electrical conductivity through the conduction barrier region is permitted, and a safety state in which electrical conductivity through the conduction barrier regions is reduced. The conduction barrier regions change from the conductive state to the safety state when the current collector receives a short-threatening event. An electrode material can be connected to the current collector. The conduction barrier regions can define electrical isolation subregions. A battery is also disclosed, and methods for making the electrode assembly, methods for making a battery, and methods for operating a battery.

## Claims

### Claim 1

A method of making an electrode, comprising the step of forming in a current collector a plurality of electrical isolation subregions defined at least in part by conduction barrier regions formed in the current collector, the isolation subregions having a conductive state in which the isolation subregions are not electrically isolated from other isolation subregions, and a safety state in which at least one isolation subregion is electrically isolated from at least one adjacent isolation subregion such that electrical conductivity through the adjacent isolation subregions in the safety state is reduced.

### Claim 2 (depends on 1)

The method of claim 1, further comprising the step of making a battery with the electrode.

### Claim 3

A method of operating a battery, comprising the steps of: forming the battery with at least one current collector comprising conduction barrier regions having a conductive state in which electrical conductivity through the conduction barrier region is permitted, and a safety state in which electrical conductivity through the conduction barrier regions is reduced, the conduction barrier regions changing from the conductive state to the safety state when the current collector receives a short-threatening event; and an electrode material connected to the current collector;
experiencing a short-threatening event at a conduction barrier region of the at least one current collector, whereupon the conduction barrier region will change from the conductive state to the safety state; and,
operating the battery with the at least one conduction barrier region in the safety state and at least one other conduction barrier region in the conductive state.