Sm Doping-Enhanced Li3VO4/C Electrode Kinetics for High-Performance Lithium-Ion Batteries

Li3VO4 (LVO) presents significant advantages in cost and capacity, making it a promising candidate for next-generation lithium-ion battery (LIB) anodes. However, its low electronic conductivity hampers practical applications. Herein, we report a Sm-modified Li3VO4/C composite (LSVO/C) designed for high-performance LIBs. Sm doping introduces additional defects and optimizes the electronic structure of Li3VO4, resulting in a significantly enhanced electronic conductivity (2.94 × 10–3 S cm–1) of the composites. Furthermore, the carbon-fiber-based framework effectively maintains structural stability during cycling, facilitating superior ion transport kinetics. Benefiting from these enhancements, the LSVO/C composite achieves remarkable discharge capacities of 379.5 mAh g–1 at 0.25 C and 260.1 mAh g–1 at 12.5 C. Additionally, an LSVO/C||NCM111 full cell, using LiNi1/3Co1/3Mn1/3O2 (NCM111) as the cathode, retains a discharge capacity of 50.5 mAh g–1 after 1000 cycles at 3.0 C, highlighting the potential of LSVO/C for practical applications. This unique method in preparing anode material will open new gates for highly efficient LIBs.