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FeNi Nanoparticles Coated on N‐doped Ultrathin Graphene‐like Nanosheets as Stable Bifunctional Catalyst for Zn‐Air Batteries
Author(s) -
Zhang Chuanxiang,
Wu Chao,
Gao Yong,
Gong Yun,
Liu Huiying,
He Jianping
Publication year - 2021
Publication title -
chemistry – an asian journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.18
H-Index - 106
eISSN - 1861-471X
pISSN - 1861-4728
DOI - 10.1002/asia.202100347
Subject(s) - bifunctional , materials science , catalysis , nanosheet , chemical engineering , graphene , oxygen evolution , electrolyte , bifunctional catalyst , electrode , carbonization , inorganic chemistry , battery (electricity) , nanoparticle , carbon fibers , nanotechnology , electrochemistry , chemistry , composite material , scanning electron microscope , composite number , organic chemistry , power (physics) , physics , quantum mechanics , engineering
High‐performance and low‐cost bifunctional catalysts are crucial to energy conversion and storage devices. Herein, a novel oxygen electrode catalyst with high oxygen evolution reaction and oxygen reduction reaction (OER/ORR) performance is reported based on bimetal FeNi nanoparticles anchored on N‐doped graphene‐like carbon (FeNi/N−C). The complete 2D ultrathin carbon nanosheet is induced by etching and stripping of molten sodium chloride and its ions in the carbonization process at suitable temperature. The obtained FeNi/N−C catalyst exhibits rapid reaction kinetics for OER, efficient four electron transfer for ORR, and outstanding bifunctional performance with reversible oxygen electrode index of 0.87 V for OER/ORR. Zn‐air batteries with a high open‐circuit voltage of 1.46 V and a stable discharge voltage of 1.23 V are assembled using liquid electrolytes, zinc sheet as Zn‐electrode and FeNi/N−C coating on carbon cloth as air‐electrode. The specific capacity is as high as 816 mAh g −1 and there is extremely little decay after charge‐discharge cycle time of 275 h for the FeNi/N−C as oxygen electrode catalyst in Zn‐air battery, which are much better than that assembled with Pt/C−RuO 2 catalyst.