Observation of Microheterogeneity in Highly Concentrated Nonaqueous Electrolyte Solutions

Lily A. Robertson, Zhixia Li, Yu Cao, Ilya A. Shkrob, Madhusudan Tyagi, Kyle C Smith, Lu Zhang, Jeffrey S Moore, Y. Z

Research output: Contribution to journalArticle

Abstract

The development of models to describe structure and dynamics of nonaqueous electrolyte solutions is challenging, and experimental observations are needed to form a foundation. Here, neutron scattering is used to probe molecular dynamics in nonaqueous organic electrolytes. Two solutions were compared: one contained symmetrical electrolyte molecules prone to crystallize, and one contained desymmetrized electrolyte molecules preferring disordered states. For the latter, calorimetry and neutron data show that a disordered fluid persists to very low temperatures at high concentrations. Upon heating, localized cold crystallization occurs, leading to burst nucleation of microcrystalline solids within fluid phases. Our findings indicate molecular clustering and point to solvation inhomogeneities and molecular crowding in these concentrated fluids.

Original languageEnglish (US)
JournalJournal of the American Chemical Society
DOIs
StatePublished - Jan 1 2019

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electrolyte
Electrolytes
Observation
Neutrons
Fluids
fluid
neutron scattering
Calorimetry
Molecules
Solvation
calorimetry
Molecular Dynamics Simulation
Neutron scattering
Crystallization
inhomogeneity
Heating
nucleation
Cluster Analysis
Molecular dynamics
crystallization

ASJC Scopus subject areas

  • Catalysis
  • Chemistry(all)
  • Biochemistry
  • Colloid and Surface Chemistry

Cite this

Observation of Microheterogeneity in Highly Concentrated Nonaqueous Electrolyte Solutions. / Robertson, Lily A.; Li, Zhixia; Cao, Yu; Shkrob, Ilya A.; Tyagi, Madhusudan; Smith, Kyle C; Zhang, Lu; Moore, Jeffrey S; Z, Y.

In: Journal of the American Chemical Society, 01.01.2019.

Research output: Contribution to journalArticle

Robertson, Lily A. ; Li, Zhixia ; Cao, Yu ; Shkrob, Ilya A. ; Tyagi, Madhusudan ; Smith, Kyle C ; Zhang, Lu ; Moore, Jeffrey S ; Z, Y. / Observation of Microheterogeneity in Highly Concentrated Nonaqueous Electrolyte Solutions. In: Journal of the American Chemical Society. 2019.
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