Cryo-STEM imagery of silicon and the solid-electrolyte interphase (SEI) layer

Cryo-STEM imagery of silicon and the solid-electrolyte interphase (SEI) layer

Cryo-STEM imagery of silicon and the solid-electrolyte interphase (SEI) layer during battery recharging

Cryo-STEM imagery showing the structural and chemical evolution of silicon and the solid-electrolyte interphase (SEI) layer. After the 36th cycle to the 100th cycle the silicon nanowire expands and becomes irregular, mingling with the SEI to form a soft composite structure. 

IMAGE: Jennifer M. McCann