Dexmet Expanded Foils - Anode and Cathode Materials

July 06, 2015 - "Press Releases"

Dexmet Corporation adds new line of materials for use in lithium ion applications.

Wallingford, CT, - Dexmet develops MicroGrid® and PolyGrid® precision expanded foils and polymers for high-performance applications.

Dexmet has been providing expanded metal foils for primary and secondary battery applications for over thirty (30) years.  Over these years, we have tried to advance the expanding process to introduce new and unique materials for the battery industry. These open area foils have worked well in many primary battery applications but have had limited success in lithium ion chemistries.  Feedback from industry researchers and battery designers recommended producing thinner materials that would be better suited for lithium ion designs.  Dexmet engineers have made great strides in advancing the design of our expanding equipment which has allowed us to produce materials thinner than previously possible.  We are now able to offer materials down to 25 micron (.001”) in both aluminum and copper at widths up to 305mm (12”).  These thinner materials coupled with our ability to produce very small openings in the material, should prove to be the perfect anode and cathode electrode solution for improved overall cell performance.

Dexmet Copper

As an alternative to solid foils, these open area expanded materials will require less binder to adhere the active material to the electrode surface.  The reduction in binder will result in better ion and electron flow for better rate capability and quicker recharge cycles.  In addition, the volumetric reduction of binder is offset by more active material resulting in better energy density within the cell.  Using an open area expanded product also improves the thermal properties of a cell by reducing the internal heat generated during the charge and discharge cycles, which plague so many of the current lithium ion designs today, creating an improvement in the overall life expectancy of the battery.

We believe that these new configurations will provide battery manufacturers the best results when coating active materials and provide optimal cell performance.  As with all Dexmet materials, slight changes to the configurations (opening size, open area) can be made if necessary to meet your requirements. We are excited at the opportunity to introduce these new materials and the prospect of taking battery technology to the next performance level.

Dexmet Aluminum

Research literature and samples of our new materials will be available, September 15-17, 2015 at the Battery Show in Novi, Michigan. Attendees can come to booth# B1941 to pick up samples and literature on our new materials. Steve Tucker and John Hart of our Power Technology Group will be on hand to answer any questions regarding our material and its usage in current or future battery applications.


Dexmet Corporation manufactures precision expanded metals, foils and polymers for power applications needing exact mechanical and electrical properties. Dexmet is joint ISO 9001:2008  and AS9100 certified and is the leader in the manufacturing of foil gauge precision expanded metals and polymers serving a wide range of engineered product applications. Visit http:// for details.





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