This doesn't mean that things are hoping in Okinawa in the field of lithium ion battery development.  No Siree!!  At OIST they haven't been caught naping:

Okinawa Institute of Science and Technology (OIST) Graduate UniversitySummary:New research has identified a nanostructure that improves the anode in lithium-ion batteries. Instead of using graphite for the anode, the researchers turned to silicon: a material that stores more charge but is susceptible to fracturing. The team deposited silicon atoms on top of metallic nanoparticles to form an arched nanostructure, increasing the strength and structural integrity of the anode. Electrochemical tests showed the batteries had a higher charge capacity and longer lifespan.  Silicon anode structure generates new potential for lithium-ion batteries -- ScienceDaily