MOF-derived Co3O4@rGO nanocomposites as anodes for high-performance lithium-ion batteries

• Published in: Ionics 2021-10, Vol.27 (10), p.4197-4204
• Main Authors: Wang, Fengyue, Ye, Yusheng, Wang, Zhimeng, Lu, Jiahao, Zhang, Qi, Zhou, Xinping, Xiong, Qiming, Qiu, Xiangyun, Wei, Tao
• Format: Article
• Language: English
• Subjects: Anodes; Chemistry; Chemistry and Materials Science; Cobalt oxides; Condensed Matter Physics; Electrochemical analysis; Electrochemistry; Electrode materials; Energy Storage; Graphene; Heat treatment; Lithium; Lithium-ion batteries; Metal-organic frameworks; Nanocomposites; Optical and Electronic Materials; Original Paper; Rechargeable batteries; Renewable and Green Energy; Transition metal oxides
• ISSN: 0947-7047; 1862-0760
• DOI: 10.1007/s11581-021-04225-4

The Co 3 O 4 @rGO derived from metal–organic frameworks (MOFs) were prepared by a simple solvothermal method followed by the heat treatment. In a typical preparation process, the Co-MOF (ZIF-67) acts as the precursor to obtain desirable nano Co 3 O 4 while the reduced graphene oxide (rGO) layer enhances the conductivity. The materials were respectively characterized by XRD, SEM, and then further electrochemical tests. As anode materials for lithium-ion batteries (LIBs), the material of Co 3 O 4 @rGO exhibit overall superb electrochemical properties especially when the rGO proportion is 20%, it displays higher capacity (818.5 mAh g −1 at 100 mA g −1 ), higher cycling stability (87.3% capacity retention after 100 cycles), and better rate performance. The work may throw some lights on the preparation of other transition metal oxides by structure design with rGO layer for further applications. Graphical abstract