Controlled Synthesis of Flower-like Hierarchical NiCo-Layered Double Hydroxide Integrated with Metal–Organic Framework-Derived Co@C for Supercapacitors

• DOI: 10.1021/acsami.3c05061
• Publication Date: 2023-07-24T11:48:21Z
• Authors: Junzhuo Yuan; Yingxin Li; Guoge Lu; Zhan Gao; Fuxiang Wei; Jiqiu Qi; Yanwei Sui; Qingqing Yan; Song Wang
• Keywords: Metal hydroxide; Layered double hydroxides

Layered double hydroxides (LDHs) have come to the foreground recently, considering their unique layered structure and short ion channels when they act as electrode materials for supercapacitors (SCs). However, due poor rate cycle performance, are not highly sought after in market. Therefore, a flower-like hierarchical NiCo-LDH@C nanostructure with flake NiCo-LDH anchored on carbon skeleton has emerged here, which is constructed by calcination hydrothermal reaction applying ZIF-67 precursor. In this structure, grows outward abundant homogeneously distributed Co nanoparticles Co@C nucleation sites, forming that combined tightly skeleton. The nanostructures formed composite of metal–organic frameworks (MOFs) LDHs successfully enhanced performance LDH strength strong structural stability, large specific surface area, cooperative effect. displays superb electrochemical capacitance 2210.6 F g–1 at 1 A 88.8% retention 10 g–1. Furthermore, asymmetric supercapacitor (ASC) NiCo-LDH@C//RGO reveals remarkable energy density 45.02 W h kg–1 power 799.96 kg–1. This project aims propose novel avenue exploit provide theory methodological guidance deriving complex structures from MOF derivatives.