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Tuning interface mechanism of feco alloy embedded N,S-codoped carbon substrate for rechargeable Zn-air battery

Journal of Energy Chemistry 2024年第6期93卷 400-410,I0010页

作者： Hui Chang Lulu Zhao Shan Zhao Zong-Lin Liu Peng-Fei Wang Ying Xie Ting-Feng Yi School of Materials Science and Engineering Northeastern UniversityShenyang 110819LiaoningChina Key Laboratory of Functional Inorganic Material Chemistry Ministry of EducationSchool of Chemistry and Materials ScienceHeilongjiang UniversityHarbin 150080HeilongjiangChina Key Laboratory of Dielectric and Electrolyte Functional Material Hebei Province School of Resources and MaterialsNortheastern University at QinhuangdaoQinhuangdao 066004HebeiChina

The interface mechanism between catalyst and carbon substrate has been the focus of *** this paper,the feco alloy embedded N,S co-doped carbon substrate bifunctional catalyst(feco/S-NC)is obtained by a simple one-step pyrolysis *** experimental results and density functional theory(DFT)calculation show that the formation of feco alloy is conducive to promoting electron transfer,and the introduction of S atom can enhance the interaction between feco alloy and carbon substrate,thus inhibiting the migration and agglomeration of particles on the surface of carbon *** feco/SNC catalysts show outstanding performance for oxygen reduction reaction(ORR)and oxygen evolution reaction(OER).feco/S-NC shows a high half-wave potential(E_(1/2)=0.8823 V)for ORR and a low overpotential at 10 mA cm^(-2)(E_(j=10)=299 mV)for *** addition,compared with Pt/C+RuO_(2) assembled Zn-air battery(ZAB),the feco/S-NC assembled ZAB exhibits a larger power density(198.8 mW cm^(-2)),a higher specific capacity(786.1 mA h g_(zn)~(-1)),and ultra-stable cycle *** results confirm that the optimized composition and the interfacial interaction between catalyst and carbon substrate synergistically enhance the electrochemical performance.

关键词： feco alloy N S co-doped carbon DFT calculation Zn-air batteries Interfacial interaction

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feco alloy/N,S co-doped carbon aerogel derived from directionalcasting cellulose nanofibers for rechargeable liquid flow and flexible Zn–air batteries

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Nano Research 2023年第5期16卷 6870-6880页

作者： Yiwen Zhang Xifeng Zhang Yuting Li Juan Wang Sibudjing Kawi Qin Zhong School of Chemistry and Chemical Engineering Nanjing University of Science and TechnologyNanjing 210094China Department of Chemical and Biomolecular Engineering National University of SingaporeSingapore 117582Singapore

Bifunctional oxygen reduction reaction(ORR)and oxygen evolution reaction(OER)electrocatalysts with the advantages of excellent activity and stability are the vital components of air cathodes for rechargeable Zn–air batteries(ZABs).Herein,the carbon aerogel with honeycomb-like structure,N and S double doping and loaded with feco alloy nanoparticles(NSCA/feco)was prepared successfully as cathodes for rechargeable liquid flow and two-dimensional flexible ZABs by clever directional *** interaction between the bimetallic alloy and the double-doped carbon with specifical structure,large surface,great conductivity endows NSCA/feco with effective ORR/OER active sites and small charge/mass transport barrier,thus achieving outstanding bifunctional catalytic *** NSCA/feco displays a half-wave potential of+0.85 V(*** hydrogen electrode(RHE))for ORR and an overpotential of 335 mV at a current density of 10 mA·cm^(−2)for OER,which is even comparable to the performance of noble-metal catalysts in relevant fields(Pt/C for ORR and RuO_(2)for OER).Consequently,the rechargeable liquid flow ZABs assembled with NSCA/feco showed excellent performance(maximum power density:132.0 mW·cm^(−2),specific capacity:804.5 Wh·kg^(−1)at 10 mA·cm^(−2),charge and discharge cycle stability of more than 250 cycles).Furthermore,the flexible NSCA/feco-based ZABs have a maximum power density of 43.0 mW·cm^(−2),outstanding charging–discharge stability of more than 450 cycles,exhibit good flexibility under different bending ***,this work has provided an efficient bifunctional electrocatalyst for OER/ORR and a promising strategy of air cathodes for rechargeable and wearable ZABs.

关键词： carbon aerogel bifunctional electrocatalyst feco alloy directional freeze-casting rechargeable zinc–air batteries flexible batteries

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Effect of Cu seed on the synthesis and characterization of feco alloy nano-particles by using polyol method

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中国科学:技术科学 2010年第4期 429-429页

作者： Uk Rae CHO Young Min LEE Shalendra KUMAR Chan Gyu LEE Bon Heun KOO School of Nano-Advanced Materials Engineering Changwon National University

Fine metal particles with uniform shape,narrow size distribution and high purity are increasingly needed for specific uses in high tech industrial *** report the direct chemical synthesis of feco alloy particles using the mixture of FeCl2·4H2O,Co(Ac) 2·4H2O(Ac:acetate) and NaOH in ethylene glycol,and then obtained feco alloy particles better dispersed by adding the polyvinylpyrrolidone(PVP) and also the size could be controlled by adding *** prepared nano-particles were characterized using FESEM,XRD and *** mean diameter of these particles was varied in the range of submicrometer to nanometer with metal-ion *** particles showed the typical soft magnetic properties.

关键词： polyol method feco alloy nanoparticle Cu seed soft magnetic

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Texture Evolution in Heavily Cold-Rolled feco-2V alloy during Annealing

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Journal of Materials Science & Technology 2009年第2期25卷 219-224页

作者： Jiangning Deng Yanling Yang Yandong Wang Jingeng CHEN Rulin Peng Chenchen Yuan Emmanuel Bouzy Jean-Jacques Fundenberger Key Laboratory for Anisotropy and Texture of Materials （Ministry of Education） Northeastern University Shenyang 110004 China Key Laboratory of Electromagnetic Processing of Materials （Ministry of Education） Northeastern University Shenyang 110004 China Department of Mechanical Engineering Linkoping University S-61182 LinkSping Sweden Letam Institut Superieur de Genie Mecanique et Productique Universite de Metz FR-57045 Metz France

The recrystallization texture evolution in heavily cold-rolled （93%） feco-2V alloy with annealing temperature and time was investigated by X-ray diffraction and electron backscatter diffraction. It was found that the orientation density of α-fiber texture component fluctuates with increasing annealing temperature and time. The transmission electron microscopy images show that abundant precipitates appear inside the recrystallized grains and around the grain boundaries. The amount and size of the precipitates also vary with annealing temperature and time. The enhancement of the α-fiber coincides well with the increase of number density of fine precipitates, indicating that the fine precipitates facilitate the development of α-fiber. The annealing texture evolution observed in the feco alloy could be attributed to the facilitating effect of the precipitates on the development of α-fiber and the ordering process.

关键词： feco alloy Annealing Texture Precipitate

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A dual metal-organic framework strategy for synthesis of feco@NC bifunctional oxygen catalysts for clean energy application

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Chinese Journal of Chemical Engineering 2022年第3期35卷 161-168页

作者： Jun Chen Liandong Li Liu Yang Chang Chen Shitao Wang Yan Huang Dapeng Cao State Key Laboratory of Organic-Inorganic Composites Beijing University of Chemical TechnologyBeijing 100029China

Developing high efficient bifunctional oxygen electrocatalysts for clean energy applications like Zin-air battery(ZAB)is highly desired,because it would reduce the cost and speed up the practical application of *** we use a dual metal-organic framework(MOF)synthesis strategy to prepare the N-doped carbon supported bimetallic feco nanoparticle catalysts(marked as feco@NC)by pyrolysis of Zn CoZIF/MIL-101(Fe)*** feco@NC exhibits remarkable electrocatalytic activity for ORR with half-wave potential of 0.89 V *** reversible hydrogen electrode(RHE)and robust durability for both ORR and OER(oxygen reduction reaction and oxygen evolution reaction),which is attributed to the generation of Fe_(0.26)Co_(0.74) crystalline phase and mesopores due to the dual-MOF synthesis *** rechargeable ZAB based on feco@NC air electrode shows a maximum energy density of139.6 mW·cm^(-2) and excellent cyclic stability over 130 h,significantly surpassing the Pt and Ir-based *** present work provides a useful dual-MOF synthesis strategy for preparing high-performance multifunctional catalysts for ORR,OER and hydrogen evolution reaction(HER).

关键词： Metal Organic Frameworks Zeolite imidazole framework Bifunctional electrocatalysts feco alloy Zn-air battery

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