New cathode material La2/3Cu3Ti4 – xFexO12 – δ for solid oxide fuel cell: Synthesis and electrical conductivity
- Autores: Pantyukhina M.I.1, Dunyushkina L.A.2
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Afiliações:
- Institute of Solid State Chemistry
- Institute of high-temperature Electrochemistry UB of RAS
- Edição: Volume 24, Nº 3 (2024)
- Páginas: 161-168
- Seção: Articles
- URL: https://ogarev-online.ru/1608-4039/article/view/381232
- DOI: https://doi.org/10.18500/1608-4039-2024-24-3-161-168
- EDN: https://elibrary.ru/ZQHMWE
- ID: 381232
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Resumo
Copper lanthanum titanate La2/3Cu3Ti4−xFexO12−δ x = 0–1 was doped with Fe3+ cations. The diagram of the dependence of the tolerance factor on the relative electronegativity of cations for all studied compositions was represented. It was shown that all the compositions exist in the region of existence of distorted perovskite. X-ray diffraction and X-ray phase analysis methods established the region of existence of solid solutions of La2/3Cu3Ti4−xFexO12−δ obtained by ceramic technology, which was 0 ⩽ x ⩽ 0.4. The temperature dependences of electrical conductivity for the compositions from the region of existence of solid solutions La2/3Cu3Ti4−xFexO12−δ were obtained. The ionic-electronic nature of conductivity was suggested. It was shown that the decrease of electronic conductivity under the increase of iron content was due to the compensation of electronic carriers formed during acceptor doping.
Sobre autores
Marina Pantyukhina
Institute of Solid State Chemistry
ORCID ID: 0000-0001-7743-1333
Código SPIN: 4212-1141
Scopus Author ID: 6603535593
Researcher ID: JBI-9365-2023
91 Pervomayskaya St.,
Liliya Dunyushkina
Institute of high-temperature Electrochemistry UB of RAS
ORCID ID: 0000-0003-3369-5454
Código SPIN: 4863-9960
20, Akademicheskaya St., Yekaterinburg, 620990
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