Investigation of the Effect of Hydrophilicity on Oxygen Reduction Reaction Property with Measurement of Water Vapor Specific Surface Area

For oxygen reduction reaction of an air battery which uses oxygen and water as reactants, it is important to control not only gas diffusivity but also hydrophilicity. In this study, the effect of hydrophilicity was investigated quantitatively. Various hydrophilic reaction layers were prepared with d...

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Autores principales:	Satoko TAKASE, Ayumi KIMOTO, Masaki KUSUNOKI, Youichi SHIMIZU
Formato:	article
Lenguaje:	EN JA
Publicado:	The Electrochemical Society of Japan 2021
Materias:	hydrophilicity oxygen reduction three-phase interface air battery Technology T Physical and theoretical chemistry QD450-801
Acceso en línea:	https://doaj.org/article/6f1da1e3895c4268845e530088e10d15
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spelling	oai:doaj.org-article:6f1da1e3895c4268845e530088e10d152021-11-05T00:17:27ZInvestigation of the Effect of Hydrophilicity on Oxygen Reduction Reaction Property with Measurement of Water Vapor Specific Surface Area2186-245110.5796/electrochemistry.21-00094https://doaj.org/article/6f1da1e3895c4268845e530088e10d152021-11-01T00:00:00Zhttps://www.jstage.jst.go.jp/article/electrochemistry/89/6/89_21-00094/_html/-char/enhttps://doaj.org/toc/2186-2451For oxygen reduction reaction of an air battery which uses oxygen and water as reactants, it is important to control not only gas diffusivity but also hydrophilicity. In this study, the effect of hydrophilicity was investigated quantitatively. Various hydrophilic reaction layers were prepared with different amounts of Nafion as hydrophilic binder. The hydrophilicity was evaluated by measuring water vapor adsorption and nitrogen adsorption isotherms and calculating specific surface area by Brunauer-Emmett-Teller (BET) method. Polarization curves of oxygen reduction reaction revealed that the hydrophilicity effect differs between the reaction rate-determining range and the diffusion rate-determining range. In the reaction rate-determining range, the oxygen reduction current increased in proportion to the amount of water in the reaction layer, indicating the extension of the three-phase interface as the reaction field. In the diffusion rate-determining range, oxygen reduction current decreased with increasing the hydrophilicity, which demonstrates that high hydrophilicity suppressed oxygen diffusion.Satoko TAKASEAyumi KIMOTOMasaki KUSUNOKIYouichi SHIMIZUThe Electrochemical Society of Japanarticlehydrophilicityoxygen reductionthree-phase interfaceair batteryTechnologyTPhysical and theoretical chemistryQD450-801ENJAElectrochemistry, Vol 89, Iss 6, Pp 597-601 (2021)
institution	DOAJ
collection	DOAJ
language	EN JA
topic	hydrophilicity oxygen reduction three-phase interface air battery Technology T Physical and theoretical chemistry QD450-801
spellingShingle	hydrophilicity oxygen reduction three-phase interface air battery Technology T Physical and theoretical chemistry QD450-801 Satoko TAKASE Ayumi KIMOTO Masaki KUSUNOKI Youichi SHIMIZU Investigation of the Effect of Hydrophilicity on Oxygen Reduction Reaction Property with Measurement of Water Vapor Specific Surface Area
description	For oxygen reduction reaction of an air battery which uses oxygen and water as reactants, it is important to control not only gas diffusivity but also hydrophilicity. In this study, the effect of hydrophilicity was investigated quantitatively. Various hydrophilic reaction layers were prepared with different amounts of Nafion as hydrophilic binder. The hydrophilicity was evaluated by measuring water vapor adsorption and nitrogen adsorption isotherms and calculating specific surface area by Brunauer-Emmett-Teller (BET) method. Polarization curves of oxygen reduction reaction revealed that the hydrophilicity effect differs between the reaction rate-determining range and the diffusion rate-determining range. In the reaction rate-determining range, the oxygen reduction current increased in proportion to the amount of water in the reaction layer, indicating the extension of the three-phase interface as the reaction field. In the diffusion rate-determining range, oxygen reduction current decreased with increasing the hydrophilicity, which demonstrates that high hydrophilicity suppressed oxygen diffusion.
format	article
author	Satoko TAKASE Ayumi KIMOTO Masaki KUSUNOKI Youichi SHIMIZU
author_facet	Satoko TAKASE Ayumi KIMOTO Masaki KUSUNOKI Youichi SHIMIZU
author_sort	Satoko TAKASE
title	Investigation of the Effect of Hydrophilicity on Oxygen Reduction Reaction Property with Measurement of Water Vapor Specific Surface Area
title_short	Investigation of the Effect of Hydrophilicity on Oxygen Reduction Reaction Property with Measurement of Water Vapor Specific Surface Area
title_full	Investigation of the Effect of Hydrophilicity on Oxygen Reduction Reaction Property with Measurement of Water Vapor Specific Surface Area
title_fullStr	Investigation of the Effect of Hydrophilicity on Oxygen Reduction Reaction Property with Measurement of Water Vapor Specific Surface Area
title_full_unstemmed	Investigation of the Effect of Hydrophilicity on Oxygen Reduction Reaction Property with Measurement of Water Vapor Specific Surface Area
title_sort	investigation of the effect of hydrophilicity on oxygen reduction reaction property with measurement of water vapor specific surface area
publisher	The Electrochemical Society of Japan
publishDate	2021
url	https://doaj.org/article/6f1da1e3895c4268845e530088e10d15
work_keys_str_mv	AT satokotakase investigationoftheeffectofhydrophilicityonoxygenreductionreactionpropertywithmeasurementofwatervaporspecificsurfacearea AT ayumikimoto investigationoftheeffectofhydrophilicityonoxygenreductionreactionpropertywithmeasurementofwatervaporspecificsurfacearea AT masakikusunoki investigationoftheeffectofhydrophilicityonoxygenreductionreactionpropertywithmeasurementofwatervaporspecificsurfacearea AT youichishimizu investigationoftheeffectofhydrophilicityonoxygenreductionreactionpropertywithmeasurementofwatervaporspecificsurfacearea
_version_	1718444532961378304

Investigation of the Effect of Hydrophilicity on Oxygen Reduction Reaction Property with Measurement of Water Vapor Specific Surface Area

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