Fe-Co-Ni ternary single-atom electrocatalyst and stable quasi-solidelectrolyte enabling high-efficiency zinc-air batteries  

作　　者：Shifeng Qin Kaiqi Li Mengxue Cao Wuhua Liu Zhongyuan Huang Guanjie He Ivan P.Parkin Huanxin Li 

机构地区：[1]College of Chemistry and Chemical Engineering,Hunan University,Changsha,410082,China [2]Department of Chemistry,University College London,London,WC1H 0AJ,UK [3]Guizhou Dalong Huicheng New Material Co.,Ltd,Tongren 554001,China [4]Electrochemical Innovation Lab,Department of Chemical Engineering,University College London,London,WC1E 7JE,UK [5]Department of Chemistry,Physical&Theoretical Chemistry Laboratory,University of Oxford,South Parks Road,Oxford,OX13QZ,UK

出　　处：《Nano Research Energy》2024年第3期61-72,共12页纳米能源研究（英文）

基　　金：supported by the National Natural Science Foundation of China(No.21908049);China Postdoctoral Science Foundation(No.2020M682560);Science and Technology Innovation Program of Hunan Province(No.2020RC2024);Hunan Provincial Natural Science Foundation of China(No.2022JJ40035);Chinese Universities Scientific Fund(No.15052001);Engineering and Physical Sciences Research Council(EP/L015862/1).

摘　　要：The non-noble metal(Fe,Co,Ni,etc.)catalysts possess promising potential to replace noble metals(e.g.,Pt,Ru,Ir,etc.)as catalysts for oxygen electrocatalysis.Up to now,various mono-and dual-single-atom catalysts have been fabricated,though it is still challenging to synthesise ternary single-atom catalysts due to the difference of interaction forces between different metal ions(Fe,Co,Ni,etc.)and ligands.Here,we report a Fe-Co-Ni ternary single-atom catalyst(FeCoNi-Nx)derived from a zeolitic imidazolate frameworks(ZIF)precursor as an efficient oxygen electrocatalyst,and an optimised flexible casting-drying polyvinyl alcohol(CD-PVA)film as a quasi-solid electrolyte host,for high-efficiency solid-state Zn-air batteries.The aberration-corrected HAADF-STEM and EELS spectrum confirm the co-existence of Fe,Co and Ni single atoms in the FeCoNi-Nx catalyst,and the electrochemical,mechanical,and durability tests prove the superiority of the CD-PVA film.As a result,the FeCoNi-Nx-based rechargeable Zn-air battery delivers superior specific capacity(846.8 mAh·gZn-1)and power density(135 mW·cm^(-2))in aqueous electrolyte,as well as an over 60 mW·cm^(-2)power density in quasi-solid electrolyte.As a result,the quasi-solid-state Zn-air battery with a small area of only 2 cm2 is able to charge a mobile phone,which outperforms all the reported devices to date.

关 键 词：Fe-Co-Ni ternary single atoms ELECTROCATALYST CD-PVA film solid-state Zn-air battery long-term durability 

分 类 号：TM911.41[电气工程—电力电子与电力传动]