Reversible crystalline-amorphous phase transformation in Si nanosheets with lithi-/delithiation.

Silicon (Si) has a large theoretical capacity of 4200 mAhg and has great potential as a high-performance anode material for Li ion batteries (LIBs). Meanwhile, nanostructures can exploit the potential of Si and, accordingly, many zero-dimensional (0D) and one-dimensional (1D) Si nanostructures have been studied. Herein, we report on two-dimensional (2D) Si nanostructures, Si nanosheets (SiNSs), as anodes for LIBs.