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2D Dual‐Metal Zeolitic‐Imidazolate‐Framework‐(ZIF)‐Derived Bifunctional Air Electrodes with Ultrahigh Electrochemical Properties for Rechargeable Zinc–Air Batteries
Author(s) -
Wang Tingting,
Kou Zongkui,
Mu Shichun,
Liu Jingping,
He Daping,
Amiinu Ibrahim Saana,
Meng Wen,
Zhou Kui,
Luo Zhixiong,
Chaemchuen Somboon,
Verpoort Francis
Publication year - 2018
Publication title -
advanced functional materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 6.069
H-Index - 322
eISSN - 1616-3028
pISSN - 1616-301X
DOI - 10.1002/adfm.201705048
Subject(s) - zeolitic imidazolate framework , imidazolate , materials science , bifunctional , metal organic framework , oxygen evolution , electrochemistry , nanoparticle , cobalt , chemical engineering , pyrolysis , zinc , battery (electricity) , catalysis , carbon nanotube , nanomaterials , nanotechnology , electrode , organic chemistry , adsorption , metallurgy , chemistry , engineering , power (physics) , physics , quantum mechanics
Here first a 2D dual‐metal (Co/Zn) and leaf‐like zeolitic imidazolate framework (ZIF‐L)‐pyrolysis approach is reported for the low‐cost and facile preparation of Co nanoparticles encapsulated into nitrogen‐doped carbon nanotubes (Co‐N‐CNTs). Importantly, the reasonable Co/Zn molar ratio in the ZIF‐L is the key to the emergence of the encapsulated microstructure. Specifically, high‐dispersed cobalt nanoparticles are fully encapsulated in the tips of N‐CNTs, leading to the full formation of highly active Co–N–C moieties for oxygen reduction and evolution reactions (ORR and OER). As a result, the obtained Co‐N‐CNTs present superior electrocatalytic activity and stability toward ORR and OER over the commercial Pt/C and IrO 2 as well as most reported metal‐organic‐framework‐derived catalysts, respectively. Remarkably, as bifunctional air electrodes of the Zn–air battery, it also shows extraordinary charge–discharge performance. The present concept will provide a guideline for screening novel 2D metal‐organic frameworks as precursors to synthesize advanced multifunctional nanomaterials for cross‐cutting applications.