文献类型：期刊文献

英文题名：Fe-based species anchored on N-doped carbon nanotubes as a bifunctional electrocatalyst for acidic/neutral/alkaline Zn-air batteries

作者：Xu, Yan[1];Zhang, Bo[2];Ran, Jiaqi[2];Liu, Peitao[2];Gao, Daqiang[2]

第一作者：徐彦

通讯作者：Liu, PT[1]

机构：[1]Xinxiang Univ, Phys & Elect Engn Dept, Xinxiang 453003, Henan, Peoples R China;[2]Lanzhou Univ, Key Lab Magnetism & Magnet Mat MOE, Key Lab Special Funct Mat & Struct Design MOE, Lanzhou 730000, Peoples R China

第一机构：新乡学院物理与电子工程学院

通讯机构：[1]corresponding author), Lanzhou Univ, Key Lab Magnetism & Magnet Mat MOE, Key Lab Special Funct Mat & Struct Design MOE, Lanzhou 730000, Peoples R China.

年份：2020

卷号：31

期号：26

外文期刊名：NANOTECHNOLOGY

收录：;EI(收录号：20202108682015);Scopus(收录号：2-s2.0-85084272483);WOS:【SCI-EXPANDED(收录号:WOS:000528637000001)】；

基金：This work is supported by the Science Fund of the Educational Department of the Henan Province of China and the Ninth Group of Key Disciplines in the Henan Province (Grant No. 2018119).

语种：英文

外文关键词：Fe; Fe3C@N-C; pH-universal; bifunctional electrocatalyst; Zn-air batteries; rechargeable

摘要：Exploring efficient and durable bifunctional catalysts in pH-universal media is critical for versatile fuel cells. Herein, Fe-based species anchored on N-doped carbon nanotubes (Fe/Fe3C@N-C) are used for bifunctional oxygen electrocatalysts. The composite electrocatalyst exhibits low potential gaps (Delta E, Delta E = E-j(=10) - E-1/2) in a pH-universal environment. The estimated values are about 0.70, 1.07,and 1.10 V in alkaline, neutral, and acidic medias. A neutral Zn-air battery (ZAB) is constructed using an Fe/Fe3C@N-C composite as the air electrode, which exhibits a favorable performance in energy storage with an open-circuit potential (OCP) of 1.42 V and a high power density of 80 mW cm(-2). The ZAB also has superior cycling stability with only a 0.5% decay after 1200 charge-discharge cycles at 2 mA cm(-2). While the assembled ZAB in acidic media indicates an OCP of 1.40 V, a power density of 23 mW cm(-2), and 612 discharge-charge cycles. The ZAB is rechargeable and has a cycling lifespan of 120 h. This work provides potential applications of Fe/Fe3C@N-C as air electrodes for advanced pH-universal media based on ZABs for future energy storage devices.