Nickel/cobalt bimetallic metal-organic frameworks ultrathin nanosheets with enhanced performance for supercapacitors

By Xiaolong Zhang, Jiemei Wang, X. Ji, Y. Sui, F. Wei, J. Qi, Qingkun Meng, Yaojian Ren, Yezeng He. Journal of Alloys and Compounds, 2020

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Abstract In this work, the lamellae-like Ni/Co metal-organic framework (Ni/Co-MOF) is synthesized via a facile one-step hydrothermal process. By combining the advantages of mixed-metallic components and unique structures, the fabricated Ni/Co-MOF electrode exhibits a superior specific capacity (568 C g−1 at 1 A g−1), good rate performance (80.1% retention at 10 A g−1) and high cycling stability (75.5% retention over 3000 charge/discharge cycles). Besides, the assembling asymmetric supercapacitor based on the Ni/Co-MOF and reduced graphene oxide (RGO) exhibits a high energy density of 42.24 Wh kg−1 at the power density of 800 W kg−1, and excellent electrochemical cycling stability of 82.6% retention of original capacitance over 6000 charge/discharge cycles.

Subfields: Electrical and Electronic Engineering, Electronic, Optical and Magnetic Materials

View Paper: https://www.semanticscholar.org/paper/f0946d9966310cadbf72e763140868b5594b6017