Graphene-based Electrodes for Next Generation Li Batteries

C. Martin
Vorbeck Materials Corp, US

Keywords: Li-ion batteries, lithium air, lithium sulfur, graphene

Summary:

Lithium-ion based batteries are the most rapidly growing segment of the battery market due to their high-energy storage capacity per unit weight and specific power. However, to meet the demands of electrical vehicle transportation and next generation consumer electronics power storage, further advancements in performance are needed. Vorbeck Materials Corp, in partnership with the Pacific Northwest National Labs (PNNL) and Princeton University, is developing next generation lithium-ion batteries using graphene technology. Graphene offers unique advantages as an electrode material because it is strong, thin and highly conductive. These unique properties combined with specifically designed chemical modification of the graphene and a novel porous structure has advanced what is feasible for lithium battery energy storage. Developments by PNNL and Princeton using graphene-sulfur cathodes has demonstrated very high capacity (over 900 mAh/g), high current densities, and good capacity retention, and lithium-oxygen batteries incorporating graphene as a cathode material have shown even higher storage capacity, 15,000 mAh/g. We will discuss advances in graphene-electrodes for next generation lithium ion batteries and how Vor-x™ graphene-based materials can play a significant role in meeting high energy storage per unit cost, improved transfer efficiency, and longer cycle lifetime requirements of modern electronics and electric vehicle systems.