Electrochemical Isotope Effect and Lithium Isotope Separation

Lithium has been electrochemically intercalated from a 1:2 (v/v) mixed solution of ethylene carbonate (EC) and methylethyl carbonate (MEC) containing 1 M LiClO4 into graphite, and the lithium isotope fractionation accompanying the intercalation was observed. The lighter isotope was preferentially fractionated into graphite. The single-stage lithium isotope separation factor ranged from 1.007 to 1.025 at 25 °C and depended little on the mole ratio of lithium to carbon of the lithium-graphite intercalation compounds (Li-GIC) formed. The separation factor inceased with the relative content of lithium. This dependence seems consistent with the existence of an equilibrium isotope effect between the solvated lithium ion in the EC/MEC electrolyte solution and the lithium in graphite, and with the formation of a solid electrolyte interfaces on graphite at the early stage of intercalation.

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High-efficiency lithium isotope separation by electrochemical deposition and intercalation with electrochemical isotope effect in propylene carbonate and [BMIM][DCA] ionic liquid

Electrochimica Acta ◽

10.1016/j.electacta.2020.137060 ◽

2020 ◽

Vol 361 ◽

pp. 137060

Author(s):

Zongliang Zhang ◽

Arun Murali ◽

Prashant K. Sarswat ◽

Michael L. Free

Keyword(s):

Ionic Liquid ◽

Isotope Effect ◽

Propylene Carbonate ◽

Electrochemical Deposition ◽

High Efficiency ◽

Isotope Separation ◽

Lithium Isotope

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Lithium Isotope Effect Accompanying Electrochemical Insertion of Lithium into Liquid Gallium

Zeitschrift für Naturforschung A ◽

10.1515/zna-2010-0511 ◽

2010 ◽

Vol 65 (5) ◽

pp. 461-467 ◽

Cited By ~ 5

Author(s):

Keita Zenzai ◽

Ayaka Yasui ◽

Satoshi Yanase ◽

Takao Oi

Keyword(s):

Isotope Effect ◽

Isotope Effects ◽

Isotope Separation ◽

Ethylene Carbonate ◽

Quantitative Agreement ◽

Liquid Gallium ◽

Molecular Orbital Calculations ◽

Lithium Isotope ◽

Mixed Solution ◽

Separation Factors

Lithium was electrochemically inserted from a 1 : 2 (v/v) mixed solution of ethylene carbonate (EC) and methylethyl carbonate (MEC) containing 1M LiClO4 into liquid gallium to observe lithium isotope effects accompanying the insertion. It was observed that the lighter isotope 6Li was preferentially fractionated into liquid gallium with the single-stage lithium isotope separation factors S, ranging from 1.005 to 1.031 at 50 °C and 1.003 to 1.024 at 25 °C. The lithium isotope effects estimated by molecular orbital calculations at the B3LYP/6-311G(d) level of theory agreed qualitatively with those of the experiments, but the quantitative agreement of the two was not satisfactory

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The Isotope Effect of a Direct Electric Current through Liquid and Solid Metals

Zeitschrift für Naturforschung A ◽

10.1515/zna-1956-0112 ◽

1956 ◽

Vol 11 (1) ◽

pp. 71-75

Author(s):

E. Haeffner ◽

Th. Sjöborg ◽

S. Lindhe

Keyword(s):

Liquid Metal ◽

Electric Current ◽

Isotope Effect ◽

Direct Current ◽

Capillary Tube ◽

Isotope Separation ◽

Direct Electric Current ◽

Separation Effect ◽

A Current

The isotope separation effect of a direct electric current in a liquid metal is demonstrated by passing a current through mercury, which is enclosed in a capillary tube. The second part of the paper deals with an attempt of establishing an isotope effect when a direct current is passed through an uranium wire.

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