ZIF-8 derived ZnFe2O4 nanoparticles as a high-performance anode material for lithium-ion batteries

• Published in: Chemical physics Vol. 574; p. 112027
• Main Authors: Tang, Fei, Xie, Jingjing, Li, Haifeng, Jiang, Wei, Yang, Zhenglong, Zhao, Deyang, Xu, Yanbin, Sun, Wenjuan, Jiang, Ziqiao, Yin, Ping
• Format: Journal Article
• Language: English
• Published: Elsevier B.V 01.10.2023
• Subjects: Fe2O3; Lithium storage; ZIF-8; ZnFe2O4 nanoparticles; ZIF-8; ZnFe2O4 nanoparticles; Fe2O3; Lithium storage
• ISSN: 0301-0104
• DOI: 10.1016/j.chemphys.2023.112027

[Display omitted] •ZnFe2O4 nanoparticles were prepared using Fe2O3/ZIF-8 as precursor.•Appropriate amount of Fe2O3 leads to ZnFe2O4 nanoparticles with porous structure.•Bimetallic ZnFe2O4 nanoparticles exhibit good electrical conductivity.•The porous structure increases the contact area between ZnFe2O4 and electrolyte.•ZnFe2O4 nanoparticles exhibit enhanced lithium storage performance. ZnFe2O4 nanoparticles and ZnO/ZnFe2O4 composites were prepared by simple calcination of Fe2O3/ZIF-8. The bimetallic ZnFe2O4 not only inherit the high lithium storage capacity of Fe2O3, but also exhibit higher conductivity than that of single Fe or Zn oxides. The effect of Fe2O3 content in the raw materials on the structure and electrochemical performance of the product was discussed. Appropriate amount of Fe2O3 helps to obtain ZnFe2O4 nanoparticles with small size and porous structure, which can shorten the diffusion path of lithium ions, increase the contact area between the electrode material and electrolyte, thus improving the performance of the material. After 200 cycles at a current density of 300 mA g−1, the specific capacity can reach 1223.2 mAh/g. When the current density is increased to 2 A/g, the discharge specific capacity is retained at 809.4 mAh/g after 500 cycles.