Green fabrication of sandwich-like and dodecahedral C@Fe3O4@C as high-performance anode for lithium-ion batteries

• Published in: Journal of solid state electrochemistry 2017-09, Vol.21 (9), p.2593-2600
• Main Authors: Liu, Ge, Shao, Jie, Gao, Youjun, Chen, Zheng, Qu, Qunting
• Format: Article
• Language: English
• Subjects: Analytical Chemistry; Carbon; Characterization and Evaluation of Materials; Chemistry; Chemistry and Materials Science; Condensed Matter Physics; Electrochemistry; Energy Storage; Ion storage; Iron oxides; Lithium; Lithium-ion batteries; Metal-organic frameworks; Original Paper; Physical Chemistry; Polyelectrolytes; Rechargeable batteries
• ISSN: 1432-8488; 1433-0768
• DOI: 10.1007/s10008-017-3667-3

Sandwich-structured C@Fe 3 O 4 @C hybrids with Fe 3 O 4 nanoparticles sandwiched between two conductive carbon layers have attracted more and more attention owing to enhanced synergistic effects for lithium-ion storage. In this work, an environment-friendly procedure is developed for the fabrication of sandwich-like C@Fe 3 O 4 @C dodecahedrons. Zeolitic imidazolate framework (ZIF-8)-derived carbon dodecahedrons (ZIF-C) are used as the carbon matrix, on which iron precursors are homogeneously grown with the assistance of a polyelectrolyte layer. The subsequent polydopamine (PDA) coating and calcination give rise to the formation of sandwiched ZIF-C@Fe 3 O 4 @C. When being evaluated as the anode material for lithium-ion batteries, the obtained hybrid manifests a high reversible capacity (1194 mAh g −1 at 0.05 A g −1 ), good high-rate behavior (796 mAh g −1 at 10 A g −1 ), and negligible capacity loss after 120 cycles.