Influence of Zn2+ and Sb5+ co-substitution for Sn4+ on crystal structure and electrical conductivity of SnP2O7 electrolyte

Autor:	Kiyoshi Uchiyama, Hirotaka Ogawa, Susumu Takahashi, Kohei Nishimoto, Isao Kagomiya, Tohru Moriyama
Rok vydání:	2022
Předmět:	Materials science Proton Mechanical Engineering Metals and Alloys chemistry.chemical_element Crystal structure Electrolyte Oxygen chemistry Mechanics of Materials Electrical resistivity and conductivity Lattice (order) Materials Chemistry Physical chemistry Solid solution
Zdroj:	Journal of Alloys and Compounds. 892:162163
ISSN:	0925-8388
DOI:	10.1016/j.jallcom.2021.162163
Popis:	In order to investigate the effects of the Zn and Sb cosubstitution for Sn on the crystal structure and electrical conductivity of SnP2O7, Sn1−x(Zn2/3Sb1/3)xP2O7 compounds were synthesized in this study. The crystal structure refinement results show the solid solution limit of the Sn1−x(Zn2/3Sb1/3)xP2O7 compounds to be x = 0.15. The electrical conductivity of the compounds was enhanced depending on the level of the composition x. The highest value of 2.2 × 10−2 S cm−1 was obtained for x = 0.15, at 250 °C. It was suggested that the interstitial proton of the Sn1−x(Zn2/3Sb1/3)xP2O7 lattice was introduced by the formation of oxygen vacancies that originated from the cosubstitution of Zn and Sb for Sn. It was confirmed that the introduction of the interstitial proton significantly enhanced the electrical conductivity of the Sn1−x(Zn2/3Sb1/3)xP2O7 compounds. Thus, the Sn1−x(Zn2/3Sb1/3)xP2O7 compounds can be a promising candidate electrolyte with proton conducting at intermediate operating temperatures.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::a691af1b77d074554908cd10f39aea61 https://doi.org/10.1016/j.jallcom.2021.162163 Zobrazit plný text záznamu Full Text from ScienceDirect