"scientists use a tin-carbon anode and a cathode made of lithium manganese oxide doped with nickel and cobalt."

"the tin-carbon anode has a high cycling life of several hundred cycles without a reduction in capacity, as well as discharge-charge efficiency approaching 100%"

"The battery has: 1) a high volumetric and gravimetric energy density; 2) a high rate capability due to the nano-structured characteristics of the electrode materials; 3) an excellent cycle life; and 4) low cost, due to the use of electrode materials based on abundant elements"

http://www.physorg.com/news/2011-02-lithium-ion-battery-chemistry-power-electric...
February 21, 2011