The NANX website has information about battery products. It says:
New generations of energy-hungry electronic devices, such as digital cameras, phones, portable computing devices, and automobiles demand high performance batteries.
NanoArc® products including Aluminum Oxide, Zinc Oxide , Bismuth Oxide, and Cerium Oxide function in a variety of capacities. Each of these products offers a variety of attributes that add value to Lithium-Ion and Lithium Primary Battery applications.
Uses of nano metal oxides in Lithium-Ion cells include stability enhancing additives in high voltage cathodes, ceramic doped membranes, exterior coatings on separators, precursors to synthesis of cathode material, and components of the hermetic seals.
This is probably relatively new but I don't know for sure.
You can find it by going to the website and searching "batteries".