Co/Zn bimetallic organic framework nanoparticles on carbon fibers as cathode for a high-performance rechargeable aqueous Zn-ion hybrid supercapacitor. (1st March 2023)

• Record Type: Journal Article
• Authors: Chen, Xiaoyu; Li, Yifeng; Li, Ling; Zhu, Qiancheng; Liang, Baolai; Zhao, Jie; Zhang, Wenming
• Is Part Of: Scripta materialia. Number 225(2023)
• Publication Date: 2023-03-01
• Subjects: Bimetallic organic framework -- Nanostructured materials -- Cathode -- Zn-ion hybrid supercapacitor -- Energy storage; Materials -- Periodicals; Metallurgy -- Periodicals; Metalen; Legeringen; Materiaalkunde; Metals, metalworking and machinery industries; Metals; Electronic journals; 620.11
• DOI: 10.1016/j.scriptamat.2022.115171
• Languages: English
• ISSNs: 1359-6462

Abstract

Abstract: Zinc-ion hybrid supercapacitors (ZHCs) are attracting more attentions due to their high energy/power densities and safety. Pseudocapacitive materials can provide larger capacitances than carbon materials due to their specific faradaic processes. Metal-organic frameworks with good electronic conductivity and abundant redox functional groups are ideal cathodic materials. Herein, a bimetallic organic framework cathode (Co/Zn-ZIF(M24)@CC) is proposed as a high-performance cathode in Zn-ion hybrid supercapacitor. The Co/Zn-ZIF(M24)@CC cathode benefits from a dual-ion storage mechanism of the pseudocapacitive behavior of H + and the electrical double-layer capacitance behavior of Zn 2+, which is methodically explored by ex situ electroanalytic characterizations. The as-prepared Co/Zn-ZIF (M24)@CC electrode achieved the highest energy density of 124.6 Wh kg −1 at 49.2 W kg −1 . This study lays the foundation for the rational design of metal-organic cathodes in ZHCs. Graphical abstract: Image, graphical abstract