Graphene-based Next Generation Li Batteries

J. Lettow and C. Martin
Vorbeck Materials Corp, US

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

Summary:

To meet the demands of electrical vehicle transportation and next generation consumer electronics power storage, further advancements in battery energy storage performance is needed. Vorbeck Materials Corp, in partnership with the Department of Energy’s Pacific Northwest National Labs (PNNL) and Princeton University, is working to develop next generation lithium ion batteries using graphene technology. Graphene offers unique advantages as an electrode material in lithium ion batteries because it is strong, thin and highly conductive. The unique performance properties of graphene combined with specifically designed chemical modification of the graphene and a novel porous structure has advanced the limit on in what is feasible for lithium battery energy storage. For example, 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 set the highest energy storage capacity ever recorded, 15,000 mAh/g. We will discuss new 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.