Bi2O3/Fe2O3 composite of microcube structure derived from Prussian blue as anode materials for lithium-ion batteries

• Published in: Ionics 2023-11, Vol.29 (11), p.4629-4638
• Main Authors: Yao, Shaowei, Shi, Chonghua, Liu, Xinyu, Nie, Jiajin, Ma, Xuegang
• Format: Article
• Language: English
• Subjects: Anodes; Bismuth trioxide; Chemistry; Chemistry and Materials Science; Composite materials; Condensed Matter Physics; Electrochemical analysis; Electrochemistry; Electrode materials; Energy Storage; Heat treatment; Ion diffusion; Lithium-ion batteries; Optical and Electronic Materials; Performance tests; Pigments; Rechargeable batteries; Renewable and Green Energy
• ISSN: 0947-7047; 1862-0760
• DOI: 10.1007/s11581-023-05189-3

In this study, a Prussian Blue-bismuth (PB-Bi) microcube composite anode material was designed and synthesized by introducing Bi ions into Prussian blue (PB). Through the morphology, structure and electrochemical performance test at different heat treatment temperatures, it is found that Bi 2 O 3 /Fe 2 O 3 composites inherit the microcube structure of PB at the optimum annealing temperature of 500 ℃. When used as anode material for lithium-ion batteries, the composite has excellent electrochemical performance, and its discharge specific capacity can still maintain 576.6 mAh g −1 after 100 cycles at the current density of 100 mA g −1 . The results show that by introducing Bi ions into PB to form Bi 2 O 3 /Fe 2 O 3 microcubic composite anode material, the active site of Li ion diffusion and migration is greatly improved, thus improving the excellent electrochemical performance of the anode material. All in all, the composites provide a new direction for the research of Bi-based lithium-ion battery anode materials.