I have 20 years of experience, and specialize in the field of Li ion batteries with specific knowledge in the areas of cathode materials, anode materials and polymer electrolytes. I have published on such topics as Li ion battery materials, Na ion battery materials and polymer electrolytes for metallic Li batteries. I have testified on metal oxide intercalation compounds for Li ion batteries. I’ve been able to witness the remarkable development of Li ion batteries from the idea stage to reality over the past 20 years, so am intimately acquainted with the materials science involved.