Constructing Biomass-Based Ultrahigh-Rate Performance SnO @C/SiO Anode for LIBs via Disproportionation Effect.

To break the stereotype that silica can only be reduced via a magnesiothermic and aluminothermic method at low-temperature condition, the novel strategy for converting silica to SiO using disproportionation effect of SnO generated via low-temperature pyrolysis coreduction reaction between SnO and rice husk is proposed, without any raw materials waste and environmental hazards. After the low-temperature pyrolysis reaction, SnO @C/SiO composites with unique structure (Sn/SnO dispersed on the surface and within pores of biochar as well as SiO residing in the interior) are obtained due to the exclusive biological properties of rice husk. Such unique structural features render SnO @C/SiO composites with an excellent talent for repairing the damaged structure and the highly electrochemical storage ability (530.8 mAh g at 10 A g after 7500 cycles). Furthermore, assembled LiFePO ||SnO -50@C/SiO full cell displays a high discharge capacity of 463.7 mAh g after 100 cycles at 0.2 A g . The Li transport mechanism is revealed by density functional theory calculations. This work provides references and ideas for green, efficient, and high-value to reduce SiO , especially in biomass, which also avoids the waste of raw materials in the production process, and becomes an essential step in sustainable development.