3D Carbon Electrode with Hierarchical Nanostructure Based on NiCoP Core‐Layered Double Hydroxide Shell for Supercapacitors and Hydrogen Evolution

• DOI: 10.1002/celc.202100343
• Publication Date: 2021-05-29T07:52:56Z
• Authors: Cunpeng Duan; Lili Wang; Jianping Liu; Yuning Qu; Jian Gao; Yuying Yang; Bing Wang; Jiahui Li; Linlin Zheng; Mengzhu Li; Zhen Yin
• Keywords: Overpotential

Abstract Currently, the development of self‐supported and low‐cost earth‐abundant electrocatalysts with well‐defined nanostructure has shown significant potential in energy‐related storage electrocatalytic reactions. Herein, a three‐dimensional (3D) self‐supporting electrode NiCoP@NiCo LDH/CC (NCP@NCH/CC) constructed NCP@NCH core‐shell nanostructures carbon cloth as substrate been developed via hydrothermal subsequent electrodeposition process. The obtained 3D 1D NiCoP nanowires (NWs) core 2D NiCo LDH nanosheets shell can exhibit superior electrochemical performance remarkable stability for pseudocapacitive reaction hydrogen evolution (HER), even comparable to best reported transition metal phosphides (TMP) electrodes. It reveals an ultra‐high area specific capacitance (9.4 F/cm 2 at 10 mA/cm 3 M KOH electrolyte), outstanding retention (74.12 % from 60 ) excellent cycling (93.51 original was retained after 5000 cycles 50 supercapacitor material. For HER alkaline media, it demonstrate overpotential 182 mV Tafel slope 82 / dec 1 KOH. acidic electrolyte, 141 0.5 H SO 4 . enhancement be ascribed anchored on synergistic effect electrode. Our present work provides facile strategy construct TMP‐based nanostructures, demonstrating great promise processes energy conversion.