Constantin Stefan Biography and Net Worth

Dr. Ionel Stefan is Amprius’ Chief Technology Officer. He joined Amprius in its very early days in 2009 as a Senior Scientist, initially to lead electrochemistry for silicon nanowire anode-based lithium-ion batteries. Dr. Stefan now leads Amprius' development of silicon nanowire electrochemistry, cell technology --including material design, cell design and engineering -- and product development. At Amprius, he has served as Principal Investigator on multiple projects, including NASA, Army, DOE and USABC-funded research and development efforts.

Dr. Ionel Stefan received his Ph.D in Chemistry from Case Western Reserve University(2002) with research activities focused on the development of new materials and devices for energy production and storage. He was a Postdoctoral Fellow at Lawrence Berkeley National Laboratory, developing high temperature solid oxide fuel cells. Later, at Nanosys, he became familiar with silicon nanowire materials and developed methanol fuel cells with catalysts supported on nanowire electrodes. At Nanosys, Ionel began developing silicon anodes for lithium-ionbatteries. At Amprius since 2009, he leads development of materials and electrochemistry for silicon anode-based cells and products.