Researchers at the Harbin Institute of Technology in China and the University of Michigan in the US are reporting on a new high surface area 3D composite made from reduced graphene oxide loaded with lithium iron phosphate nanoparticles. The material, assembled layer by layer, has a reversible lithium storage capacity as high as 148 mA h g-1 and a Coulombic efficiency of 99% after 100 cycles at 1 coulomb. The composite also allows for unusually high reversible charge-discharge rates of up to 160 C with a storage capacity of 56 mA h g-1. These charging rates are at least 500 times higher than typical charging rates of 0.25 C. It might find use in next-generation flexible energy storage applications and as a battery material in mobile devices like phones and tablets that need to be rapidly recharged……….
http://nanotechweb.org/cws/article/tech/61177
