Metal-organic frameworks derived transition metal phosphide/carbon for high performance asymmetric supercapacitor. (25th November 2022)

• Record Type: Journal Article
• Authors: Zhang, Hongxue; Wang, Yanyan; Chen, Chunxia; Wu, Xiaoliang
• Is Part Of: Journal of energy storage. Volume 55:Part C(2022)
• Publication Date: 2022-11-25
• Subjects: Transition metal phosphides -- Cobalt nickel phosphide -- Zeolitic imidazolate frameworks -- Supercapacitor -- Metal-organic frameworks; Energy storage -- Periodicals; Energy storage -- Research -- Periodicals; 621.3126
• DOI: 10.1016/j.est.2022.105623
• Languages: English
• ISSNs: 2352-152X

Abstract

Abstract: Transition metal phosphides (TMPs) with high electrochemical activity have emerged as promising electrode materials for supercapacitors. Herein, we reported a facile strategy to fabricate porous hollow nanostructure cobalt zinc nickel phosphide/carbon (CoZnNiP/C) composite derived from Zn/Co zeolitic imidazolate frameworks (ZIF) as precursor by a solvothermal reaction and followed phosphorization. As for the optimized CoZnNiP/C-2 electrode, it delivers a high specific capacity of 760 C g −1 and good rate performance (603 C g −1 at 20 A g −1 ). The good performances come from the unique hollow structure with abundant active sites and rich internal nanoporous channels inside the shell, which can promote the diffusion of ions. Moreover, the assembled asymmetric supercapacitor using CoZnNiP/C-2 as positive electrode and hierarchical porous carbon (HPC) as negative electrode delivers a high energy density of 45.9 W h kg −1 and superior electrochemical stability. Highlights: The hollow nanostructure cobalt zinc nickel phosphide/carbon was synthesized by using Zn/Co ZIF as precursor. The CoZnNiP/C-2 delivers large specific capacitance and good electrochemical stability. The symmetrical supercapacitor shows high energy density and superior cycling stability.