Development of a new system of solid ionic conductors based on multi-doped ceria for application in IT-SOFCs

Објеката

Тип

Рад у часопису

Верзија рада

објављена верзија

Језик

енглески

Креатор

Marija Stojmenović, Neda Nišić, Milan Zunić, Francesco Basoli, Jelena Gulicovki, Ivica Ristović, Milan Kragović

Извор

Processing and Application of Ceramics

Издавач

National Library of Serbia

Датум издавања

2022

Сажетак

Nanodimenzionisana multi-dopirana cerija sa sastavom Ce0.8Nd0.0025Sm0.0025Gd0.005Di0.095I0.095O2-d (CNSDI) kao perspektivni čvrsti jonski provodnik je dobijen modifikovanim glicin-nitratnim postupkom (MGNP) i samopropagirajućom reakcijom na sobnoj temperaturi (SPRT). Presovani peleti oba praha su sinterovani na 1550 °C za 2 h u vazdušnoj atmosferi. Dobijeni sinterovani uzorci su okarakterisani KSRPD, Raman spektroskopijom, FESEM, EDS i EIS metode. Uprkos visokoj temperaturi sinterovanja, KSRPD i FESEM analize uzorci su potvrdili odgovarajuće dimenzije zrna sa strukturom fluorita. Ukupna koncentracija uvedenih dodataka (k = 0,2) u strukturi CeO2 nakon što je proces sinterovanja potvrđen EDS analizom.
Nakon sinterovanja, Ramanova spektroskopija je potvrdila zadržavanje slobodnih mesta kiseonika u rešetki cerije, što je u skladu sa poboljšanjem jonske provodljivosti čvrstih jonskih provodnika. Najveća vrednost ukupne provodljivost je dobijena za sinterovani uzorak MGNP na 700 °C (4,22 × 10−2 S cm−1.), sa odgovarajućom energijom aktivacije od 0,26 eV.

Nanosized multi-doped ceria with composition Ce0.8Nd0.0025Sm0.0025Gd0.005Dy0.095Y0.095O2-δ (CNSGDY) as perspective solid ionic conductor was obtained by modified glycine-nitrate procedure (MGNP) and room temperature self-propagating reaction (SPRT). The pressed pellets of both powders were sintered at 1550 °C for 2 h in an air atmosphere. The obtained sintered samples were characterized by XRPD, Raman spectroscopy, FESEM, EDS and EIS methods. Despite a high temperature of sintering, XRPD and FESEM analyses of the samples confirmed appropriate dimensions of grains with fluorite structure. Overall concentration of introduced dopants (x = 0.2) in the structure of CeO2 after the sintering process was confirmed by EDS analysis. After sintering, Raman spectroscopy confirmed retention of the oxygen vacancies in the ceria lattice, which is in accordance with the improvement of ionic conductivity of solid ionic conductors. The highest value of total conductivity was obtained for the sintered MGNP sample at 700 °C (4.22 × 10−2 S cm−1 ), with the corresponding activation energy of 0.26 eV.

том

16

Број

4

почетак странице

391

крај странице

401

doi

10.2298/PAC2204391S

issn

1820-6131

Subject

CeO2, sinterovanje, električna provodljivost, impedansna spektroskopija, gorive ćelije

CeO2, sintering, electrical conductivity, impedance spectroscopy, fuel cells

uri

http://dx.doi.org/10.2298/PAC2204391S

Шира категорија рада

M20

Ужа категорија рада

М23

Је дио

Ministry of Education, Science and Technological Development of the Republic of Serbia

Права

Отворени приступ

Лиценца

Creative Commons – Attribution-Share Alike 4.0 International

Формат

.pdf

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Ивица Ристовић

Марија Стојменовић

Radovi istraživača

Медија

1820-61312204391S.pdf

Marija Stojmenović, Neda Nišić, Milan Zunić, Francesco Basoli, Jelena Gulicovki, Ivica Ristović, Milan Kragović. "Development of a new system of solid ionic conductors based on multi-doped ceria for application in IT-SOFCs" in Processing and Application of Ceramics, National Library of Serbia (2022). https://doi.org/10.2298/PAC2204391S

This item was submitted on 14. јануар 2025. by [anonymous user] using the form “Рад у часопису” on the site “Радови”: http://drug.rgf.bg.ac.rs/s/repo