NanoGraf Corporation | 8,265 followers on LinkedIn. U.S. made, commercial-scale silicon anodes for next-gen lithium-ion batteries. | NanoGraf is the largest silicon oxide anode material producer in the United States. Its patented silicon anode technology, Onyx™, improves energy density by 30% compared to graphite. NanoGraf’s technology is in use by the U.S. military and is drop-in ready for use in any lithium-ion battery, across consumer, industrial, and defense applications.