An international patent application preserving the right to file national applications in up to 156 countries was filed on May 13.

National patent applications have also been filed in the US, Europe, China, Japan and Korea.

All of those applications claim priority from the Australian provisional patent filed on May 13.

The applications protect Altech's process for covering anode materials such as silicon and graphite with nano-layer alumina coatings.

The coatings serve as an artificial solid electrolyte interface.
According to Altech the coatings can reduce lithium loss during each battery charge and discharge cycle and also retard degradation of a battery's capacity over its life.