Chronopotentiometric study of intercalation of layered III-VI semiconductors

Journal Article · Mon Apr 01 04:00:00 EST 1985 · Sov. Electrochem. (Engl. Transl.); (United States)

OSTI ID:5532450

Bakhmatyuk, B P; Grigorchak, I I; Kaminskii, V M; Kovalyuk, Z D; Yurtsenyuk, S P

The known group of materials open to intercalation (i.e., the incorporation of foreign ions, atoms, or molecules into the space between layers of layered crystals) has recently been enlarged by the layered semiconducting monochalcogenides of indium and gallium. This article is concerned with an electrochemical investigation of their intercalation process. The chronopotentiograms for the reduction and oxidation of electrodes made of the layered monoselenides of indium and gallium in 1 M lithium perchlorate solution in propylene carbonate were examined. The electrodes studied were examined by x-rays before and after intercalation. It is indicated that the intercalation of InSe and GaSe with lithium yields nonstoichiometric phases in the range of 0 is less than x is less than or equal to 1. Using the equilibrium potentials of the intercalated phases and known relations, the free energies of these compounds and of their formation can be determined. The electrochemical intercalation leads to the formation of ternary compounds Li /SUB x/ InSe and Li /SUB x/ GaSe. The free energies of formation of these compounds increase with increasing degree of reduction of the compounds. The intercalation of indium and gallium monoselenide with lithium can be regarded as reversible.

• Research Organization: Chernovtsy Branch, Institute of Materials Science Problems, Academy of Sciences of the UkrSSR
• OSTI ID: 5532450
• Journal Information: Sov. Electrochem. (Engl. Transl.); (United States), Journal Name: Sov. Electrochem. (Engl. Transl.); (United States) Vol. 20:10; ISSN SOECA
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400400* -- Electrochemistry
ALKALI METAL COMPOUNDS
CHALCOGENIDES
CHEMICAL REACTIONS
CHEMISTRY
CHLORINE COMPOUNDS
COHERENT SCATTERING
CRYSTALS
DIFFRACTION
DIFFUSION
ELECTRIC POTENTIAL
ELECTROCHEMISTRY
ELECTRODES
ENERGY
EQUILIBRIUM
FORMATION FREE ENERGY
FREE ENERGY
GALLIUM COMPOUNDS
GALLIUM SELENIDES
HALOGEN COMPOUNDS
IMPURITIES
INDIUM COMPOUNDS
INDIUM SELENIDES
LITHIUM COMPOUNDS
LITHIUM PERCHLORATES
LITHIUM SELENIDES
MATERIALS
MONOCRYSTALS
OXYGEN COMPOUNDS
PERCHLORATES
PHYSICAL PROPERTIES
POTENTIOMETRY
REDUCTION
SCATTERING
SELENIDES
SELENIUM COMPOUNDS
SEMICONDUCTOR MATERIALS
THERMODYNAMIC PROPERTIES
TITRATION
X-RAY DIFFRACTION