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A two-dimensional type I superionic conductor.

Publication ,  Journal Article
Rettie, AJE; Ding, J; Zhou, X; Johnson, MJ; Malliakas, CD; Osti, NC; Chung, DY; Osborn, R; Delaire, O; Rosenkranz, S; Kanatzidis, MG
Published in: Nature materials
December 2021

Superionic conductors possess liquid-like ionic diffusivity in the solid state, finding wide applicability from electrolytes in energy storage to materials for thermoelectric energy conversion. Type I superionic conductors (for example, AgI, Ag2Se and so on) are defined by a first-order transition to the superionic state and have so far been found exclusively in three-dimensional crystal structures. Here, we reveal a two-dimensional type I superionic conductor, α-KAg3Se2, by scattering techniques and complementary simulations. Quasi-elastic neutron scattering and ab initio molecular dynamics simulations confirm that the superionic Ag+ ions are confined to subnanometre sheets, with the simulated local structure validated by experimental X-ray powder pair-distribution-function analysis. Finally, we demonstrate that the phase transition temperature can be controlled by chemical substitution of the alkali metal ions that compose the immobile charge-balancing layers. Our work thus extends the known classes of superionic conductors and will facilitate the design of new materials with tailored ionic conductivities and phase transitions.

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Published In

Nature materials

DOI

EISSN

1476-4660

ISSN

1476-1122

Publication Date

December 2021

Volume

20

Issue

12

Start / End Page

1683 / 1688

Related Subject Headings

  • Nanoscience & Nanotechnology
 

Citation

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MLA
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Rettie, A. J. E., Ding, J., Zhou, X., Johnson, M. J., Malliakas, C. D., Osti, N. C., … Kanatzidis, M. G. (2021). A two-dimensional type I superionic conductor. Nature Materials, 20(12), 1683–1688. https://doi.org/10.1038/s41563-021-01053-9
Rettie, Alexander J. E., Jingxuan Ding, Xiuquan Zhou, Michael J. Johnson, Christos D. Malliakas, Naresh C. Osti, Duck Young Chung, et al. “A two-dimensional type I superionic conductor.Nature Materials 20, no. 12 (December 2021): 1683–88. https://doi.org/10.1038/s41563-021-01053-9.
Rettie AJE, Ding J, Zhou X, Johnson MJ, Malliakas CD, Osti NC, et al. A two-dimensional type I superionic conductor. Nature materials. 2021 Dec;20(12):1683–8.
Rettie, Alexander J. E., et al. “A two-dimensional type I superionic conductor.Nature Materials, vol. 20, no. 12, Dec. 2021, pp. 1683–88. Epmc, doi:10.1038/s41563-021-01053-9.
Rettie AJE, Ding J, Zhou X, Johnson MJ, Malliakas CD, Osti NC, Chung DY, Osborn R, Delaire O, Rosenkranz S, Kanatzidis MG. A two-dimensional type I superionic conductor. Nature materials. 2021 Dec;20(12):1683–1688.

Published In

Nature materials

DOI

EISSN

1476-4660

ISSN

1476-1122

Publication Date

December 2021

Volume

20

Issue

12

Start / End Page

1683 / 1688

Related Subject Headings

  • Nanoscience & Nanotechnology