Catalysis-Induced Highly-Stable Interface on Porous Silicon for High-Rate Lithium-Ion Batteries

• In situ etching and co-growth of ultra-thin defect-rich oxide layers on porous silicon create a catalytic interface that promotes selective FEC adsorption and decomposition to a LiF-rich SEI. • The robust SEI enables high-rate performance (692 mAh g−1 at 25 A g−1) and high Coulombic efficiency (99.7% over 1000 cycles) at varied temperatures. • The catalytic interface addresses the uncontrollable SEI formation on porous silicon, overcoming limitations of conventional carbon composites and nanostructures. • This approach offers significant advantages for fast-charging silicon-based anodes in lithium-ion batteries.