Research progress in solid-phase prelithiation of silicon-oxygen anode material for lithium-ion batteries

Solid-phase prelithiation technology has become one of the commonly used prelithiation methods for silicon-oxygen anode materials due to its simple preparation process, environmental friendliness, and excellent prelithiation effect. This paper reviews the solid-phase prelithiation technology for silicon-oxygen materials (SiO_x), categorizing the lithium sources used in solid- phase prelithiation techniques. A comparative analysis of various solid-phase prelithiation methods is conducted in terms of electrochemical performance, process complexity, and environmental friendliness. The paper summarizes the enhancement effects of lithium source wet coating on SiO_x and the component regulation of lithium metasilicate (Li₂SiO₃) on solid-phase prelithiation performance. Based on this, it discusses the existing problems, solutions, and new development directions of solid-phase prelithiation technology, and forecasts the application trends of solid-phase prelithiation in SiO_x for lithium-ion batteries.