One-step In-situ Synthesis of Vacancy-rich CoFe2O4@Defective Graphene Hybrids as Bifunctional Oxygen Electrocatalysts for Rechargeable Zn-Air Batteries  

作　　者：WANG X in ZHUANG Linzhou JIA Yi ZHANG Lijie YANG Qin XU Wenjia YANG Dongjiang YAN Xuecheng ZHANG Longzhou ZHU Zhonghua BROWN Christopher L YUAN Pei YAO Xiangdong 

机构地区：[1]School of Environment and Science,ami Queensland Micro-and Nanotechnology Centre,Griffith University,Nathan Campus,Queensland 4111,Australia [2]School of Chemistry,Physics and Mechanical Engineering,Queensland University of Technology,Brisbane,Queensland 4000,Australia [3]Collaborative Innovation Center for Mahne Biomass Fibers,Materials ami Textiles of Shandong Province,Institute of Marine Biobased Materials,College of Environmental Science and Engineering,Qingdao University,Qingdao 266071,P.R.China [4]National Engineering Research Center of Chemical Fertilizer Catalyst,College of Chemical Engineering,Fuzhou University,Fuzhou 350002,P.R.China [5]State Key Laboratory of Inorganic Synthesis and Preparative Chemistry,Jilin University,Changchun 130012,P.R.China

出　　处：《Chemical Research in Chinese Universities》2020年第3期479-487,共9页高等学校化学研究（英文版）

基　　金：the Project of the Australia Research Council(No.ARC DP200103043);the"111"Project of China(Nos.B07016,B17020);the ARC Discovery Early Career Researcher Award(No.ARC DE180101030)。

摘　　要：Developing efficient catalysts toward both oxygen reduction reaction(ORR)and oxygen evolution reaction(OER)is the core task for rechargeable metal-air batteries.Although integration of two active components should be an effective method to produce the bifunctional catalysts in principle,traditional techniques still can not attain fine tunable surface structure during material-hybridization process.Herein,we present a facile short-time in-situ argon(Ar)plasma strategy to fabricate a high-performance bifunctional hybrid catalyst of vacancy-rich CoFe2O4 synergized with defective graphence(r-CoFe2O4@DG).Reflected by the low voltage gap of 0.79V in two half-reaction measurements,the striking capability to catalyze ORR/OER endows it excellent and durable performance in rechargeable Zn-air batteries,with a maximum power density of 155.2mW/cm^2 and robust stablility(up to 60h).Further experimental and theoretical studies validate its remarkable bifunctional energetics root from plasma-induced surface vacancy defects and interfacial charge polarization between DG and CoFe2O4.

关 键 词：Defect COFE2O4 Oxygen reduction Oxygen evolution Zn-air battery 

分 类 号：O64[理学—物理化学]