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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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