Structural and electrochemical characterization of Li₂O–V₂O₅–Fe₂O₃ amorphous cathode material for lithium-ion batteries

Abstract

In order to explore novel vanadium-based amorphous materials, a series of Li 2 O–V 2 O 5 –Fe 2 O 3 amorphous materials were prepared with the low-cost melting-quenching method in this report. As the main framework of amorphous materials, VO 4 is connected with FeO 4 and FeO 6 to form a disordered network structure. 20Li 2 O–60V 2 O 5 –20Fe 2 O 3 amorphous material had a stable structure and Li-ion migration channel. In the electrochemical performance test, the second cycle discharge capacity was 150.7 mAh/g at a current density of 100 mA/g and the capacity retention rate was still 80% after 100 cycles because the redox reaction between vanadium and iron ions promoted the electrochemical performance. Li 2 O–V 2 O 5 –Fe 2 O 3 amorphous materials are promising lithium-ion battery cathode materials.