Room-temperature superionic-phase nanocrystals synthesized with a twinned lattice

Jianxiao Gong, Prashant Jain

Research output: Contribution to journalArticle

Abstract

The engineering of nanoscale features enables the properties of solid-state materials to be tuned. Here, we show the tunable preparation of cuprous sulfide nanocrystals ranging in internal structures from single-domain to multi-domain. The synthetic method utilizes in-situ oxidation to grow nanocrystals with a controlled degree of copper deficiency. Copper-deficient nanocrystals spontaneously undergo twinning to a multi-domain structure. Nanocrystals with twinned domains exhibit markedly altered crystallographic phase and phase transition characteristics as compared to single-domain nanocrystals. In the presence of twin boundaries, the temperature for transition from the ordered phase to the high-copper-mobility superionic phase is depressed. Whereas the superionic phase is stable in the bulk only above ca. 100 °C, cuprous sulfide nanocrystals of ca. 7 nm diameter and a twinned structure are stable in the superionic phase well below ambient temperature. These findings demonstrate twinning to be a structural handle for nanoscale materials design and enable applications for an earth-abundant mineral in solid electrolytes for Li-S batteries.

Original languageEnglish (US)
Article number3285
JournalNature communications
Volume10
Issue number1
DOIs
StatePublished - Dec 1 2019

Fingerprint

Crystal lattices
Nanoparticles
Nanocrystals
nanocrystals
Temperature
room temperature
Copper
Phase Transition
Twinning
twinning
copper
sulfides
Transition Temperature
Solid electrolytes
solid electrolytes
Electrolytes
ambient temperature
Minerals
electric batteries
Phase transitions

ASJC Scopus subject areas

  • Chemistry(all)
  • Biochemistry, Genetics and Molecular Biology(all)
  • Physics and Astronomy(all)

Cite this

Room-temperature superionic-phase nanocrystals synthesized with a twinned lattice. / Gong, Jianxiao; Jain, Prashant.

In: Nature communications, Vol. 10, No. 1, 3285, 01.12.2019.

Research output: Contribution to journalArticle

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