Fig. 4.

Lithium sulfide formation inside quasi-metallic silicon. a–f TEM images, and corresponding selected area diffraction patterns for (a, d) pristine, (b, e) fully lithiated, and (c, f) fully delithiated states of QMS particle. g, h HR-TEM image and corresponding elemental maps for Si and S (g) and EELS spectrum (h) of QMS after cycles and SEI elimination. Scale bars, 500 nm (a, c, e); 2 1/nm (b, d, f); 5 nm (g)