Samsung's Advanced Institute of Technology unveiled a battery technology in a research paper published in the science journal Nature Communications. The Samsung innovation aims to double the capacity of lithium-ion batteries on a single charge by using a silicon anode with layers of high-crystalline graphene on top.
The Samsung solution involves growing graphene cells directly on the silicon layers to allow for the expansion and contraction of the silicon and increase the battery's capacity to store two times as much energy as lithium-ion batteries with graphite anodes.
Samsung have anchored the graphene layers onto the silicon surface to accommodate the volume expansion of silicon via a sliding process between adjacent graphene layers. When paired with a commercial lithium cobalt oxide cathode, the silicon carbide-free graphene coating is claimed to allow the full cell to reach volumetric energy densities of 972 and 700 Wh 1-1 at first and 200th cycle, respectively, which is 1.8 and 1.5 times higher than those of current commercial lithium-ion batteries.