High-yield synthesis of ultrathin silicon nanosheets by physical grinding enables robust lithium-ion storage

Proposed a physical grinding method that high-yield synthesis of ultrathin silicon nanosheets (SiNSs) (thickness < 5 nm). Lithium-ion batteries employing SiNSs@C anodes exhibit ultra-high initial Coulombic efficiency (88.1%) at high a Si content (79%) and stable full cell cycling performance (>80% initial capacity maintained at 1C for 600 cycles). [Display omitted] •A novel method for high-yield synthesis of ultrathin SiNSs (thickness 98%), and large-scale method for preparing ultra-thin 2D SiNSs. The developed approach improves the yield of SiNSs (thickness 80%). The results presented herein confirm the significant potential applicability of the developed method for synthesizing ultra-thin SiNSs with carbon coatings.