MOF-derived heterostructure CoNi/CoNiP anchored on MXene framework as a superior bifunctional electrocatalyst for zinc-air batteries

• Published in: Chinese chemical letters Vol. 34; no. 12; pp. 108318 - 414
• Main Authors: Qiao, Jingyuan, Bao, Zhuoheng, Kong, Lingqiao, Liu, Xingyu, Lu, Chengjie, Ni, Meng, He, Wei, Zhou, Min, Sun, ZhengMing
• Format: Journal Article
• Language: English
• Published: Elsevier B.V 01-12-2023; Jiangsu Key Laboratory of Advanced Metallic Materials,School of Materials Science and Engineering,Southeast University,Nanjing 211189,China%Department of Building and Real Estate,Research Institute for Sustainable Urban Development(RISUD)and Research Institute for Smart Energy(RISE),The Hong Kong Polytechnic University,Hong Kong 999077,China%School of Chemistry and Materials Science,University of Science and Technology of China,Hefei 230026,China
• Subjects: Bifunctional electrocatalyst; Heterostructure; Metal-organic frameworks; MXene; Zn-air battery; Heterostructure; Bifunctional electrocatalyst; Zn-air battery; Metal-organic frameworks; MXene
• ISSN: 1001-8417; 1878-5964
• DOI: 10.1016/j.cclet.2023.108318

Zinc-air batteries (ZABs) are regarded as promising next-generation energy storage devices but limited by their sluggish oxygen reduction/evolution reactions (ORR/OER). Herein, the bifunctional catalyst consisting of MXene and metal compounds has been constructed via a controllable strategy. For demonstration, a 3D MXene framework with anchored heterostructure CoNi/CoNiP and nitrogen-doped carbon (NC) called H-CNP@M is constructed by metal-ion inducement and phosphorization. The bimetal-semiconductor heterostructure greatly enhances the catalytic performance. The H-CNP@M exhibits superior activities toward ORR (E1/2 = 0.833 V) and OER (η10 = 294 mV). Both aqueous and all-solid-state ZAB assembled with H-CNP@M demonstrate superior performance (peak power density of 166.5 mW/cm2 in aqueous case). This work provides a facile and general strategy to prepare MXene-supported bimetallic heterostructure for high-performance electrochemical energy devices.
A facile strategy for the controllable preparation of 3D MXene and bimetallic compound hybrids was proposed. And benefiting from the metal-semiconductor heterostructure and the hierarchical structure, the hybrid exhibits excellent OER/ORR bifunctional activity. [Display omitted]