Scalable template-free synthesis of B-N doped carbon bowls anchoring ultrafine Li3VO4 nanocrystals towards high power density and durable lithium-ion battery

Abstract

Lithium vanadate (Li3VO4) anodes have gained increasing attentions for high-power lithium-ion batteries (LIBs) owing to the outstanding capacity and high safety. However, Li3VO4 anode still faces significant challenges in terms of charge transfer kinetics and volumetric energy density. Herein, we report the large-scale preparation of boron (B) and nitrogen (N) co-doped carbon bowls anchoring ultrafine Li3VO4 nanocrystals (denoted as LVO@BNCBs) by the universal and adjustable spray drying technique, which involves the crosslinking network of boric acid (BA) and acrylic acid for carbon skeleton formation and water evaporation induced hollow morphology, followed by controlled pyrolysis. The obtained LVO@BNCBs possess a high tap density due to the stacking of porous carbon bowls, which facilitating the formation of interconnected conductive channels to promote ion transport. Thus, the LVO@BNCBs electrode demonstrated a high capacity of 592 mAh g–1 at 0.5 A g–1 and a long cycling life over 10000 cycles at 4/2 A g–1. Furthermore, the designed LVO@BNCBs//LVP full cell exhibits a power density of up to 4788.3 W kg–1, which is superior to that of the majority of existing LVO-based batteries. This scale-up synthesis of LVO@BNCBs with excellent performance expand the manufactural strategy of carbon bowls and pave the way for practical applications of LVO