A wide range of consumer/professional electric/electronic devices desperately need batteries with increased energy density. Li-ion batteries (LIB) are the most widely used and the best platform candidate.
Key criteria are cycle life and power charge/discharge capacity.
And there is a consensus that nanostructured silicon is a new and very promising anode material to deliver an energy density breakthrough. In particular, it is expected that silicon nanowires can double the LIB energy density. Still, a lot of technological challenges are to be overcome before nanostructured silicon is adopted by the LIB manufacturers.
Silicon nanowire mass manufacturing