Fluorinated organosilane polycondensation enables a robust Si anode for lithium storage

Abstract

The chemistry of fluorinated organosilane polycondensation is utilized to form a robust Si anode with F-doped SiO_x/C composite coating. F-doping promotes the formation of not only a coating rich in less electrochemically active Si⁴⁺ species but also an LiF-rich solid-state electrolyte interphase, enabling an Si anode with a long life of 500 cycles at large current densities for lithium storage.