Enhanced oxide-ion conductivity of solid-state electrolyte mesocrystals

Keishi Tsukiyama, Mihiro Takasaki, Naoto Kitamura, Yasushi Idemoto, Yuya Oaki, Minoru Osada, Hiroaki Imai

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Abstract

Oxide ion-conducting porous films were produced on a substrate by evaporation-induced self-assembly of rare earth-doped CeO 2 (REDC) nanocubes 4-5 nm in size and subsequent mild calcination at 400 °C. Mesocrystalline structures comprising iso-oriented REDC nanocubes were formed by ordered assembly based on strict attachment of their {100} faces. Enhanced oxide-ion conductivities in a temperature range of 250-350 °C were observed on the mesocrystalline films consisting of Sm-doped CeO 2 (SDC) nanocubes. The specific electrical properties of the mesocrystalline films are ascribed to improved surface-ion conduction due to a large specific surface area and a high crystallographic connectivity of SDC nanocubes.

Original languageEnglish
Pages (from-to)4523-4530
Number of pages8
JournalNanoscale
Volume11
Issue number10
DOIs
Publication statusPublished - 2019 Mar 14

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ASJC Scopus subject areas

  • Materials Science(all)

Cite this

Tsukiyama, K., Takasaki, M., Kitamura, N., Idemoto, Y., Oaki, Y., Osada, M., & Imai, H. (2019). Enhanced oxide-ion conductivity of solid-state electrolyte mesocrystals. Nanoscale, 11(10), 4523-4530. https://doi.org/10.1039/c8nr09709g