Phase equilibria, high conductivity ambient temperature liquids, and glasses in the pseudo-halide systems AlCl3-MSCN (M = Li, Na, K)

Changle Liu, Charles Angell

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21 Citations (Scopus)

Abstract

In the family of pseudo binaries, xAlCl3-(1 - x)MSCN (M = Li, Na, or K), ambient-temperature molten salt solutions are formed over the composition range, 0.35 < x < 0.75. These molten salt solutions readily form glasses. A partial determination of the phase equilibria for these pseudo binaries was made. For all three AlCl3-MSCN systems, a eutectic occurs at ∼65 mol % AICl3 and at 50, 55, and 70°C, for M = Li, Na, and K, respectively, in striking resemblance to the corresponding MCI-AICl3 systems. The decoupling of conductivity from viscosity is very pronounced amounting to almost 9 orders of magnitude for LiAlCl3SCN at Tg, and more for the Na case. The highest room temperature conductivity observed was ∼10-3(Ω - cm)-1 for M = Li and x = 0.6. Upon adding ∼24 mole % LiAlC4, the conductivity increases to values of log (σ/(Ω - cm) 1) = - 3.9, - 2.3 and - 1.0 at 0°C, 25°C and 100°C, respectively. With little change of conductivity, the eutectic compositions assume a gel-like consistency after long periods at room temperature, apparently due to homogeneously nucleated, possibly metastable, crystalline phases.

Original languageEnglish (US)
Pages (from-to)467-473
Number of pages7
JournalSolid State Ionics
Volume86-88
Issue numberPART 1
DOIs
StatePublished - Jul 1996

Fingerprint

Phase equilibria
ambient temperature
halides
Glass
conductivity
Eutectics
Molten materials
glass
molten salts
Liquids
liquids
Salts
eutectics
Chemical analysis
Temperature
room temperature
Gels
decoupling
Viscosity
Crystalline materials

Keywords

  • Ambient temperature liquids
  • Conductivity
  • Glass formation
  • Phase equilibrium
  • Pseudo binary systems

ASJC Scopus subject areas

  • Electrochemistry
  • Physical and Theoretical Chemistry
  • Energy Engineering and Power Technology
  • Materials Chemistry
  • Condensed Matter Physics

Cite this

Phase equilibria, high conductivity ambient temperature liquids, and glasses in the pseudo-halide systems AlCl3-MSCN (M = Li, Na, K). / Liu, Changle; Angell, Charles.

In: Solid State Ionics, Vol. 86-88, No. PART 1, 07.1996, p. 467-473.

Research output: Contribution to journalArticle

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