In recent years, the capacity of lithium-ion batteries could be continuously improved, as the number of charge cycles. Because the silicon expands in the battery at each charging cycle, the capacity of a battery for reasons of space but currently limited. This problem could be a team of researchers from Samsung now have at least partially solved
graphene coating ensures shifts
How Business Korea, referring to a to Nature Communications posted Paper reported it, the scientists managed to coat silicon anodes: This graph is applied directly to the silicon nanoparticles that act as anodes. Through this layer triggered by the charging operations volume increase is to be compensated, whereby a higher density is achieved, which ultimately results in a higher capacity.
The volume expansion is in so far restrained, when the silicon particles can push past the adjacent coated particles thanks to the graph. This is the volumetric energy density, that is, the capacity of the battery, the first charging cycle by 1.8 times higher than current lithium-ion batteries. At 200th charging cycle it is still 1.5 times higher.
The researchers believe that their findings could be used as a prototype to use such silicon anodes in commercial technology can , According to BusinessWeek Korea Samsung expects the new technology will have an impact on mobile devices as well as the production of electric cars. According to observers, the new process is expected to require two to three years to reach market maturity