alternativeАльтернативная энергетика и экология (ISJAEE)Alternative Energy and Ecology (ISJAEE)1608-8298Международный издательский дом научной периодики "Спейс10.15518/isjaee.2017.31-36.063-072alternative-1245Research ArticleВОДОРОДНАЯ ЭКОНОМИКАHYDROGEN ECONOMYФОРМИРОВАНИЕ ПЛЕНОК YSZ ЭЛЕКТРОЛИТА НА ПОДЛОЖКАХ NiO-YSZ МЕТОДОМ ОКУНАНИЯ В СУСПЕНЗИИ НА ВОДНОЙ ОСНОВЕFORMATION OF YSZ ELECTROLYTE FILMS ON NiO-YSZ CATHODE SUBSTRATE BY DIP-COATING IN AQUEOUS SUSPENSIONSНовиковаЮ. В.NovikovaY. V.

канд. хим. наук, научный сотрудник

Ph.D. in Chemistry, Researcher, Institute of HighTemperature Electrochemistry, UB RAS

stroevaanna@yandex.ruПузыревИ. С.PuzyrevI. S.

канд. хим. наук, старший инженер

Ph.D. in Chemistry, Senior Engineer, Institute of High-Temperature Electrochemistry, UB RAS

stroevaanna@yandex.ruСтроеваА. Ю.StroevaA. Yu.

канд. хим. наук, старший научный сотрудник

Research ID: 169181

SPIN: 9453-1231

Ph.D. in Chemistry, Senior Researcher, Institute of High-Temperature Electrochemistry, UB RAS.

Research ID: 169181

SPIN: 9453-1231

stroevaanna@yandex.ruКовальчукА. Н.KovalchukA. N.

ассистент кафедры экспериментальной физики Инженерной школы ядерных технологий

Teaching Assistant at the Department of Experimental Physics, School of Engineering Nuclear Technology of National Research Tomsk Polytechnic University

stroevaanna@yandex.ruКузьминА. В.KuzminA. V.

канд. хим. наук, заведующий лабораторией

Ph.D. in Chemistry, Head of the Laboratory, Institute of High-Temperature Electrochemistry

stroevaanna@yandex.ruИнститут высокотемпературной электрохимии УрО РАН; ФГАОУ ВО Уральский федеральный университет им. первого Президента России Б.Н. ЕльцинаРоссияInstitute of High-Temperature Electrochemistry, UB RAS; Ural Federal University named after the first President of Russia B.N. YeltsinRussian FederationНациональный исследовательский Томский политехнический университетРоссияNational Research Tomsk Polytechnic UniversityRussian Federation201728012018031-366372Copyright © Международный издательский дом научной периодики "Спейс, 20182018Международный издательский дом научной периодики "СпейсМеждународный издательский дом научной периодики "Спейсhttps://www.isjaee.com/jour/about/submissions#copyrightNoticehttps://www.isjaee.com/jour/article/view/1245

Одним из приоритетных направлений в области электрохимических устройств для генерации электроэнергии является разработка твердооксидных топливных элементов (ТОТЭ), работающих при пониженных температурах (ниже 600 ºС). Активно исследуются способы формирования пленочной электролитной мембраны, когда улучшение эксплуатационных характеристик устройства происходит за счет уменьшения толщины электролитного слоя. В качестве материала электролита ТОТЭ наиболее часто используются твердые растворы на основе оксида циркония, которые обладают достаточной кислородно-ионной проводимостью, химической стойкостью и стабильностью физических свойств как в окислительных, так и в восстановительных атмосферах. В данной работе пленки стабилизированного оксида циркония (YSZ) были получены методом окунания подложек NiO-YSZ в суспензии на водной основе с последующей термообработкой. Рассмотрены некоторые закономерности процессов кристаллизации пленок на электродных подложках в зависимости от способа приготовления пленкообразующей суспензии, морфологии поверхности подложки и режима термообработки получаемого пленочного покрытия. Выявлены оптимальные условия для получения газоплотных пленочных покрытий на подложках различной пористости. Изучено влияние состава компонентов суспензии (концентрации наполнителя и дисперсанта), вязкости и pH системы на процесс формирования пленочного электролита. Варьирование указанных параметров позволяет провести осаждение пленки стабилизированного оксида циркония с толщиной 5–10 мкм без трещин за 1–2 цикла нанесения. Показано, что применение металлокерамических композиций в качестве анодных материалов за счет наличия фазы электролита увеличивает механическую прочность несущего электрода и обеспечивает более благоприятные условия для формирования пленки электролита. Металлический компонент отвечает за хорошие электрофизические характеристики. Для ТОТЭ с кислородно-ионным электролитом на основе стабилизированного оксида циркония рассмотрены композиционные аноды, содержащие NiO и, соответственно, Ni в качестве металлической фазы после восстановления. Данный способ представляет собой простой и экономически эффективный метод изготовления тонкопленочного электролита для твердооксидного топливного элемента.

 

One of the priority direction in the field of electrochemical devices for generating electricity is the development of solid oxide fuel cells (SOFC) operating at lower temperatures (below 600 ºC). The methods of forming a film electrolyte membrane are actively investigated when an improvement in the performance characteristics of the device occurs due to a decrease in the thickness of the electrolyte layer. As the electrolyte material of SOFC, zirconium oxide based on the solid solutions are most often used which have sufficient oxygen conductivity, chemical durability, and stability of physical properties in both oxidation and reducing atmospheres. The paper explores the yttria-stabilized zirconium oxide (YSZ) thin films prepared by dip-coating of NiO-YSZ substrates in an aqueous suspension followed by heat treatment and deals with some regularities of the crystallization of films on electrode substrates depending on the method of preparation of film-forming suspension, the surface morphology of the substrate, and heat treatment conditions of the film deposition. Optimum conditions for obtaining gastight film deposition on substrates with different porosity are determined. The effect of the components composition of the suspension (concentration of YSZ, dispersant), viscosity and pH of the system on the formation of film electrolyte was studied. Varying these parameters allows the YSZ film to be deposited with a thickness of 5–10 μm without cracks for 1–2 application cycles. The use of metal-ceramic compositions as anode materials due to the presence of the electrolyte phase is shown to increase the mechanical strength of the supporting electrode and provide more favorable conditions for the formation of the electrolyte film. The metal component is responsible for good electrophysical characteristics. For SOFC with an oxygen-ion electrolyte based on stabilized zirconium oxide, we discuss the composite anodes containing NiO and, accordingly, after reduction Ni as the metallic phase. This method is a simple and cost-effective for manufacturing a thin film electrolyte for solid oxide fuel cell.

 

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The authors declare that there are no conflicts of interest present.