Low‐temperature synthesis of graphitic carbon‐coated silicon anode materials

We report the synthesis of a high‐performance graphitic carbon‐coated silicon (Si@GC) composite material for lithium‐ion batteries via a scalable production route. Porous Si is produced from the magnesiothermic reduction of commercial silica (SiO 2 ) precursor followed by low‐temperature graphitic carbon coating using glucose as the precursor. The obtained Si@GC composite achieves an excellent reversible specific capacity of 1195 mAh g −1 and outstanding cycle stability. The thick Si@GC anode (3.4 mg cm −2 ) in full cells with commercial lithium iron phosphate cathode delivers a remarkable performance of 800 mAh g −1 specific capacity and 2.7 mAh cm −2 areal capacity as well as 93.6% capacity retention after 200 cycles.