Scale-Up Synthesis of Porous Silicon Structures by Rotary Magnesiothermic Reduction of Silica for Advanced Energy Storage Materials.

ABSTRACT: A 1L-scale dynamic magnesiothermic reduction (DMR) of nonporous silica (1.8 μm in diameter) was conducted using a rotary reactor system to produce porous silicon (pSi) particles for lithium-ion battery (LIB) anodes. The effects of the NaCl (heat scavenger)-to-silica weight ratio (0.8, 3.0, 5.0, and 10.0) were systematically investigated in terms of (i) exothermic reduction heats (monitored in situ and estimated by enthalpy balance), (ii) porosity development in the resulting pSi particles, and (iii) electrochemical performance of the pSi/C composites, benchmarked against conventional silicon nanoparticles (SiNP, <50 nm)/C. When the NaCl/silica weight ratio was ≥5, no significant temperature spikes were observed due to effective dissipation of the exothermic heat, resulting in highly porous

SUBMITTER: Bae J 

PROVIDER: S-EPMC12547518 | biostudies-literature | 2025 Oct

REPOSITORIES: biostudies-literature