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001020353 005__ 20240709082049.0
001020353 037__ $$aFZJ-2024-00086
001020353 041__ $$aEnglish
001020353 1001_ $$0P:(DE-Juel1)194615$$aPark, Inhee$$b0$$eFirst author
001020353 1112_ $$aOPERANDO SPM 2023$$cBerlin$$d2023-11-14 - 2023-11-16$$wGermany
001020353 245__ $$aIn-Situ electrochemical mapping of local activity on Zn and Zn-Al alloy using scanning electrochemical microscopy
001020353 260__ $$c2023
001020353 3367_ $$033$$2EndNote$$aConference Paper
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001020353 520__ $$aMetal-air batteries have gained tremendous attention in the past years as promising technologies due to their theoretically high specific energy and environmentally friendly use of oxygen 1. Considering the cost-effectiveness and natural abundance, Zn and Al are good candidates for metal-air batteries. However, in Zn-air systems, stable cyclability is an issue due to the passivation layer on Zn electrodes in neutral electrolyte. Guerrero et al. reported recently that ethylenediaminetetraacetic acid (EDTA) as an electrolyte additive activates the surface of Zn electrode to maintain metallic property, thereby improving the performance of Zn-air batteries in near-neutral chloride-based electrolyte 2. In this study, we investigate the local activity on Zn and Zn-10Al alloy electrodes in 2 M NaCl (pH 10) containing EDTA by using scanning electrochemical microscopy (SECM). We observed that the surfaces of Zn and Zn-10Al alloy electrodes are passivated at open circuit potential (OCP) and these passivation layers disappear at OCP by adding EDTA in the electrolyte. As the potential is applied to slightly positive of OCP, the formation of the passivation layer is more dominant than the activation by EDTA, resulting from the limited amount of dissociated EDTA in near-neutral electrolyte. It is noteworthy that a clear topographic change is observed by means of AFM-SECM after the electrode contacts with EDTA, which demonstrates the effect of EDTA.
001020353 536__ $$0G:(DE-HGF)POF4-1223$$a1223 - Batteries in Application (POF4-122)$$cPOF4-122$$fPOF IV$$x0
001020353 536__ $$0G:(DE-Juel1)BMBF-03SF0627A$$aiNEW2.0 (BMBF-03SF0627A)$$cBMBF-03SF0627A$$x1
001020353 7001_ $$0P:(DE-Juel1)162243$$aDurmus, Yasin Emre$$b1
001020353 7001_ $$0P:(DE-Juel1)157700$$aKungl, Hans$$b2
001020353 7001_ $$0P:(DE-Juel1)161208$$aTempel, Hermann$$b3
001020353 7001_ $$0P:(DE-Juel1)156123$$aEichel, Rüdiger-A.$$b4$$ufzj
001020353 7001_ $$0P:(DE-Juel1)167581$$aHausen, Florian$$b5$$eCorresponding author$$ufzj
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001020353 9101_ $$0I:(DE-588b)36225-6$$6P:(DE-Juel1)167581$$aRWTH Aachen$$b5$$kRWTH
001020353 9131_ $$0G:(DE-HGF)POF4-122$$1G:(DE-HGF)POF4-120$$2G:(DE-HGF)POF4-100$$3G:(DE-HGF)POF4$$4G:(DE-HGF)POF$$9G:(DE-HGF)POF4-1223$$aDE-HGF$$bForschungsbereich Energie$$lMaterialien und Technologien für die Energiewende (MTET)$$vElektrochemische Energiespeicherung$$x0
001020353 9141_ $$y2023
001020353 920__ $$lyes
001020353 9201_ $$0I:(DE-Juel1)IEK-9-20110218$$kIEK-9$$lGrundlagen der Elektrochemie$$x0
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