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Record-breaking bifunctional oxygen electrocatalyst accomplished by a data-driven approach for zinc-air batteries

Journal of Energy Chemistry 2025年第1期100卷 144-145页

作者： Deviprasath Chinnadurai Zhi Wei Seh Institute of Materials Research and Engineering (IMRE) Agency for Science Technology and Research (A*STAR)

Rechargeable zinc-air batteries(ZABs) have recently drawn great attention in energy research due to their high theoretical capacity,low costs, and inherently safe nature [1–3]. However, the sluggish cathode reactions necessitate the development of bifunctional oxygen electrocatalysts with lower ΔE indicator values. The ΔE indicator is commonly employed to quantitatively evaluate the electrocatalytic activity of a bifunctional oxygen electrocatalyst,representing the overall overpotential from oxygen reduction reaction(ORR) to oxygen evolution reaction(OER).

关键词： Data-driven approach bifunctional oxygen electrocatalyst Record breaking performance Zinc-air batteries

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A pore-confined strategy for synthesizing CoFe nanoparticles in mesoporous biocarbon matrix as advanced bifunctional oxygen electrocatalyst for zinc-air battery

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Rare Metals 2024年第11期43卷 5757-5768页

作者： Xiang-Jun Zheng Hong-Yu Gong Na Zhang Wen-Hua Shi Qing Sun Yu-Hang Qian Li-Kun Jiang Xue-Cheng Cao Rui-Zhi Yang Chang-Zhou Yuan School of Environmental and Chemical Engineering Jiangsu University of Science and TechnologyZhenjiang 212003China Advanced Materials Institute Qilu University of Technology(Shandong Academy of Sciences)Jinan 250014China Automotive Engineering Research Institute Jiangsu UniversityZhenjiang 212013China College of Energy Soochow Institute for Energy and Materials InnovationSSoochow UniversitySuzhou 215006China School of Materials Science and Engineering University of JinanJinan 250014China

Designing rational transition-metal/carbon composites with highly dispersed and firmly anchored nanoparticles(NPs)to prevent agglomeration and shedding is crucial for realizing excellent electrocatalytic ***,a biomass pore-confined strategy based on mesoporous willow catkin is explored to obtain uniformly dispersed CoFe NPs in N-doped carbon nanotubes and hollow carbon fibers(CoFe@N-CNTs/HCFs).The resultant catalyst exhibits enhanced electrocatalytic performance,which affords a half-wave potential of 0.86 V(***)with a limited current density of 6.0 mA·cm^(-2)for oxygen reduction reaction and potential of 1.67 V(***)at 10 mA·cm^(-2)in 0.1 M KOH for oxygen evolution *** applied to rechargeable zinc-air batteries,a maximum power density of 340 mW·cm^(-2)and long-term cyclic durability over 800 h are *** superior bifunctional electrocatalytic activities are ascribed to the biocarbon matrix with abundant mesopores and unobstructed hollow channels,CoFe NPs with high dispersion and controllable nanoscale and the hybrid composite with optimized electronic *** work presents an effective approach for constraining the size and dispersion of NPs in a low-cost biocarbon substrate,offering valuable insights for designing advanced oxygen electrocatalysts.

关键词： CoFe nanoparticles Biocarbon Pore-confined strategy bifunctional oxygen electrocatalyst Zinc-air battery

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Construction of ultra-stable NiFe armored catalyst for liquid and flexible quasi-solid-state rechargeable Zn-air batteries

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Nano Research 2023年第4期16卷 4980-4986页

作者： Hanqin Sun Meiqi Zhao Chao Ma Wen Chen Yong Yang Yunhu Han Frontiers Science Center for Flexible Electronics Xi’an Institute of Flexible Electronics(IFE)and Xi’an Institute of Biomedical Materials&EngineeringNorthwestern Polytechnical UniversityXi'an 710072China Department of Chemistry Tsinghua UniversityBeijing 100084China School of Materials Science and Engineering Northwestern Polytechnical UniversityXi'an 710072China State Key Laboratory of Structural Chemistry Fujian Institute of Research on the Structure of MatterChinese Academy of SciencesFuzhou 350002China Key Laboratory for Organic Electronics and Information Displays&Institute of Advanced Materials(IAM) Nanjing University of Posts and TelecommunicationsNanjing 210023China

The commercial application of non-precious metal-based electrocatalysts is not only limited by the intrinsic activity of the catalysts,but also the stability of the catalysts is extremely ***,we fabricated an ultra-stable NiFe armored catalyst(Ar-NiFe/NC)by a simple secondary pyrolysis *** as-obtained Ar-NiFe/NC electrocatalyst exhibits an excellent bifunctional oxygen electrocatalytic performance with an activity indicatorΔE of 0.74 V *** hydrogen electrode(RHE).More importantly,the Ar-NiFe/NC electrocatalyst also shows a remarkable operational and storage *** accelerated durability test(ADT)cycles,no obvious degradation of oxygen electrocatalytic performance could be *** addition,the Ar-NiFe/NC electrocatalyst still exhibits an unbated oxygen electrocatalytic performance comparable to fresh catalysts after three months of air-exposed *** assembled liquid and flexible quasi-solid-state rechargeable Zn-air batteries with the Ar-NiFe/NC electrocatalyst exhibit impressive *** liquid rechargeable Zn-air batteries possess a high open-circuit voltage(OCV)of 1.43 V and a salient peak power density of 146.40 mW·cm^(−2),while the flexible quasi-solid-state rechargeable Zn-air batteries also exhibit an excellent OCV of 1.60 V and an exciting peak power density of 41.99 mW·cm^(−2).

关键词： bifunctional oxygen electrocatalyst outstanding durability liquid Zn-air batteries flexible quasi-solid-state Zn-air batteries

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WC/Co_(7)Fe_(3)heterojunction embedded in N,P co-doped hierarchical carbon enables rechargeable/flexible Zn-air battery

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Nano Research 2023年第2期16卷 2519-2527页

作者： Huimin Mao Xiaobin Liu Siqi Wu Yixin Fu Guishan Liu Guizhong Zhou Lei Wang Key Laboratory of Eco-chemical Engineering International Science and Technology Cooperation Base of Eco-chemical Engineering and Green ManufacturingQingdao University of Science and TechnologyQingdao 266042China College of Environment and Safety Engineering Qingdao University of Science and TechnologyQingdao 266042China College of Chemistry and Molecular Engineering Qingdao University of Science and TechnologyQingdao 266042China Chaofeng Steel Structure Group Co. Ltd.Hangzhou 311215China

Rational design and synthesis of bifunctional oxygen electrocatalysts with high activity and stability are key challenges in the development of rechargeable Zn-air batteries(ZABs).In this paper,tungsten carbide(WC)and Co_(7)Fe_(3)embedded in N,P co-doped hierarchical carbon(WC/Co_(7)Fe_(3)-NPHC)was prepared by using zeolite imidazolate frameworks as *** functional theory demonstrates that the mutual adjustment among the WC,Co_(7)Fe_(3),and N,P co-doped carbon at the three-phase heterojunction interface makes the catalyst possess moderate adsorption strength,and greatly improves the conductivity and electron transfer rate of the *** a result,the WC/Co_(7)Fe_(3)-NPHC exhibits a low overall oxygen redox potential difference of 0.72 V,while the ZAB assembled by WC/Co_(7)Fe_(3)-NPHC as an air cathode exhibits ultra-long cycle stability of over 550 ***,WC/Co_(7)Fe_(3)-NPHC can keep good charge and discharge stability at different bending angles when applied to flexible solid ZAB.

关键词： heterojunction hierarchical structure bifunctional oxygen electrocatalyst Zn-air battery

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