Structural and thermodynamic properties of cointercalated titanium disulfide

Journal Article · Mon Sep 01 00:00:00 EDT 1986 · J. Electrochem. Soc.; (United States)

DOI:https://doi.org/10.1149/1.2109060· OSTI ID:6954432

Johnson, W B; Worrell, W L

The structural and electrochemical characteristics of cointercalated titanium disulfide, Li/sub x/Na/sub y/TiS/sub 2/ have been investigated as a function of lithium content, x, for y = 0.0, 0.04, 0.16, 0.34, and 0.50. The open-circuit voltage of Li/sub x/Na/sub y/TiS/sub 2/ vs. lithium has been measured as a function of lithium concentration between 30/sup 0/ and 80/sup 0/C. The variation of the EMF as a function of chi was the same in Li/sub x/Na/sub y/TiS/sub 2/ for x + y < 1.0 as that in Li/sub x/TiS/sub 2/ when x < 1.0. The open-circuit voltage vs. lithium decreased to 1.OV when x + y > 1.2 and was nearly constant up to x + y approx. = 2.0. Four structures have been observed in the Li/sub x/Na/sub y/TiS/sub 2/ materials as the lithium and sodium content is varied: a stage II structure, a stage I(TP) structure, a stage I(TAP) structure, and a IT structure. The structural and open-circuit voltage results have been used to construct a Li-Ti-S isothermal ternary cross section, a Li-Na-TiS/sub 2/ isothermal pseudoternary cross section and to assess the electrode applications of these novel materials. The Li-Na-TiS/sub 2/ isothermal pseudoternary cross section indicates that the smaller lithium ion is able to attain higher concentrations within a phase than that of the larger sodium ion. Thus, it appears that ionic size is an important parameter in determining the location of the phase boundaries in intercalated dichalcogenides.

• Research Organization: Dept. of Metallurgical Engineering, Ohio State Univ., Columbus, OH 43210
• OSTI ID: 6954432
• Journal Information: J. Electrochem. Soc.; (United States), Journal Name: J. Electrochem. Soc.; (United States) Vol. 133:9; ISSN JESOA
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360603* -- Materials-- Properties
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400400 -- Electrochemistry
ALKALI METAL COMPOUNDS
ALKALI METALS
CHALCOGENIDES
CHEMISTRY
ELECTRIC POTENTIAL
ELECTROCHEMISTRY
ELECTRODES
ELECTROMOTIVE FORCE
ELEMENTS
ISOTHERMAL PROCESSES
LITHIUM
LITHIUM COMPOUNDS
LITHIUM SULFIDES
MEDIUM TEMPERATURE
METALS
PHASE STUDIES
PHYSICAL PROPERTIES
QUANTITY RATIO
SODIUM COMPOUNDS
SODIUM SULFIDES
STRUCTURAL CHEMICAL ANALYSIS
SULFIDES
SULFUR COMPOUNDS
THERMODYNAMIC PROPERTIES
TITANIUM COMPOUNDS
TITANIUM SULFIDES
TRANSITION ELEMENT COMPOUNDS