Magnesiothermic reduction improved route to high-yield synthesis of interconnected porous Si@C networks anode of lithium ions batteries

• An extending Mg thermal reduction improved two-step method was developed to prepare silicon-based anode; This novel synthesis strategy leaded the high-yield (exceed 95%) of desirable three-dimensional (3D) interconnecting microscale mesoporous silicon with interconnected conductive network; Silicon nano-ligaments below critical size and continuous layer, which can accommodate volume expansion as well deliver glorious reaction kinetics; The large-scale in-plane electric field effect, LiF-rich inorganic-organic SEI favorable 3D networks synergistically contributed excellent electrochemical performance p-Si@C anode. (Si) based materials has been envisaged a promising anode material for next-generation high energy-density lithium-ion batteries (LIBs) thanks its ultrahigh specific capacity. development reliable Si yet faces challenges how explore simple, convenient controllable synthetic route composite conductivity structure. Herein, we report newly by well-known Mg-thermal fabrication porous Si/C nano-architectures (p-Si@C) featuring hierarchical structure, endowing it properties structure lithium-ions (LIBs). Comprehensive characterization via various techniques coupling density functional theory calculations demonstrates as-prepared are forming stable solid-electrolyte interface (SEI), facilitating Li + transport electrons transfer, mitigating effect upon storage. As such, Si@C not only exhibit reversible capacity 1078.68 mAh g −1 impressively cycling stability over 500 cycles at 1 A but also keep quite attractive retention rate 47.9% even increasing 10 . feasibility practical application demonstrated full battery commercial lithium iron phosphate (LFP) cathode, delivers 124.4 mA boasting energy 381.61 Wh kg − 0.2 C on total mass active cathode achieve networks. Benefiting from networks, nanohybrids show batteries.