L.Q. Mai, in Semiconductor Nanowires, 2015. 126.96.36.199 Other coaxial nanowires. The pulverization of electrode material during cycling and an unstable solid-electrolyte interphase may limit the cycle life, especially for the anode materials (Si, Ge, transition metal oxides, etc.). Different from highly conductive or active shells, the stable and robust outer layer is very important.