Self-supported 3D layered zinc/nickel metal-organic-framework with enhanced performance for supercapacitors

• Published in: Journal of materials science. Materials in electronics Vol. 30; no. 19; pp. 18101 - 18110
• Main Authors: Zhang, Xiaolong, Sui, Yanwei, Wei, Fuxiang, Qi, Jiqiu, Meng, Qingkun, Ren, Yaojian, He, Yezeng
• Format: Journal Article
• Language: English
• Published: New York Springer US 01.10.2019; Springer Nature B.V
• Subjects: Bimetals; Characterization and Evaluation of Materials; Chemistry and Materials Science; Cycles; Electrode materials; Electrodes; Energy storage; Flux density; Grain size; Materials Science; Metal-organic frameworks; Morphology; Nickel; Optical and Electronic Materials; Performance enhancement; Retention; Scanning electron microscopy; Spectrum analysis; Stability; Storage capacity; Supercapacitors; Zinc
• ISSN: 0957-4522; 1573-482X
• DOI: 10.1007/s10854-019-02163-6

Metal-organic frameworks (MOFs) have been used as a novel electrode material in terms of energy storage and conversion, owning to their stable porous architectures and exceptionally specific surface area. In this study, we have synthesized Ni-MOF and bimetallic Zn/Ni-MOF via a facile one-step hydrothermal method. Comparing with the pure Ni-MOF, the as-prepared Zn/Ni-MOF exhibits a superior energy storage capacity (878 F g −1 at 1 A g −1 ), better rate performance (536 F g −1 at 10 A g −1 ) and cycling stability (72% retention over 2500 charge/discharge cycles). In addition, the assembled asymmetric supercapacitor based on the Zn/Ni-MOF-1/NF//RGO shows a remarkable supercapacitive performance with the energy density of 30.51 Wh kg −1 at the power density of 800 W kg −1 , and a superior cycling stability of 80.3% retention over 5000 cycles.