Fig. 4From: Laser-based three-dimensional manufacturing technologies for rechargeable batteriesa Schematic illustration of the 3D Si@C core–shell electrode. b SEM images of the 3D Si@C core–shell electrodes. c Rate performances of the Si@C and 3D Si@C core–shell cells at various current densities of 0.2, 0.4, 0.8, 1, 2, 4, 8, and 0.2 A/g (cut-off voltage: 0–2 V) [128]Back to article page