Converting bulk MoSi₂ alloy to a SiO_x based anode material through controlled oxidation induced sublimation

Abstract

A facile controlled oxidation induced sublimation strategy has been developed to convert MoSi2 alloy into a micron-sized SiOx/MoSi2 anode material (SiMoO-800) with a high capacity, ideal durability, and good rate performance.

Modulation of physical and chemical connections between SiOx and carbon for high-performance lithium-ion batteries

“…Following activation (0.2 A•g -1 ) in the initial three cycles, SiO x /G/C underwent cycling at 1.0 A•g -1 for 500 cycles, delivering a noteworthy lithium storage of approximately 700 mAh•g -1 with a capacity retention of 78% (compared to the fourth cycle, 898 mAh•g -1 ). This performance surpasses that of many recently reported SiO x -based anodes for LIBs [Supplementary Table 1] [18,21,25,[38][39][40][41][42][43] .…”

Material–electrolyte interfacial interaction enabling the formation of an inorganic-rich solid electrolyte interphase for fast-charging Si-based lithium-ion batteries

“…The significant volume change (118–300%) during the lithiation/delithiation processes of SiO x and the brittle mechanical property of the solid electrolyte interphase (SEI) cause the continuous SEI cracking/repairing and consumption of electrolytes, which becomes one of the dominant reasons for inferior cycling stability, low Coulombic efficiency (CE) and poor rate capability of SiO x anodes. 5,6 Construction of a mechanically robust and chemically/electrochemically stable SEI with high ion conductivity can suppress the adverse effects caused by volume changes, thereby improving the electrochemical performance of the SiO x anode. 7–9 Specifically, a SEI with high ion conductivity is instrumental in achieving the superior fast-charging capability of LIBs with high energy density.…”