Ionic conductivity and phase transition of the spinel system Li/sub 2//sub -//sub 2/ /sub x/ M/sub 1//sub +/ /sub x/ C1/sub 4/(M = Mg, Mn, Cd)

Journal Article · Thu Mar 01 04:00:00 EST 1984 · J. Electrochem. Soc.; (United States)

DOI:https://doi.org/10.1149/1.2115611· OSTI ID:6406887

Kanno, R; Takeda, K; Takeda, Y; Yamamoto, O

The spinel systems Li/sub 2//sub -//sub 2/ /sub x/ C1/sub 4/(M = Mg, Mn, Cd) with 0 less than or equal to x less than or equal to 0.33 has been studied by means of impedance measurement, differential thermal analysis, and x-ray diffraction analysis. The ionic conductivity increases and the activation energy for conduction decreases with increasing x within the solid solution range, 0 less than or equal to x less than or equal to 0.2 in Li/sub 2//sub -//sub 2/ /sub x/ Mg/sub 1//sub +/ /sub x/ C1/sub 4/, 0 less than or equal to x less than or equal to 0.24 in Li/sub 2//sub -//sub 2/ /sub x/ Mn/sub 1//sub +/ /sub x/ C1/sub 4/, and 0 less than or equal to x less than or equal to 0.05 in Li/sub 2//sub -//sub 2/ /sub x/ Cd/sub 1//sub +/ /sub x/ C1/sub 4/. The highest conductivity is found to be 1.5 x 10/sup -5/Scm/sup -1/ in Li /sub 1.52/ Mn /sub 1.24/ C1/sub 4/ at room temperature and 0.35 Scm/sup -1/ in Li /sub 1.9/ Cd /sub 1.05/ C1/sub 4/ at 400/sup 0/C. The three chloride spinels exhibit a first-order phase transition and a diffuse transition. The diffuse transition temperatures decrease with increasing x.

• Research Organization: Department of Chemistry, Faculty of Engineering, Mie University, Tsu
• OSTI ID: 6406887
• Journal Information: J. Electrochem. Soc.; (United States), Journal Name: J. Electrochem. Soc.; (United States) Vol. 131:3; ISSN JESOA
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360602* -- Other Materials-- Structure & Phase Studies
360603 -- Materials-- Properties
ALKALI METAL COMPOUNDS
ALKALINE EARTH METAL COMPOUNDS
ALUMINIUM COMPOUNDS
ALUMINIUM OXIDES
CADMIUM CHLORIDES
CADMIUM COMPOUNDS
CADMIUM HALIDES
CHALCOGENIDES
CHEMICAL COMPOSITION
CHEMISTRY
CHLORIDES
CHLORINE COMPOUNDS
CRYSTAL-PHASE TRANSFORMATIONS
DIFFUSION
DISPERSIONS
ELECTRIC CONDUCTIVITY
ELECTRIC IMPEDANCE
ELECTRICAL PROPERTIES
ELECTROCHEMISTRY
HALIDES
HALOGEN COMPOUNDS
IMPEDANCE
IONIC CONDUCTIVITY
LITHIUM CHLORIDES
LITHIUM COMPOUNDS
LITHIUM HALIDES
MAGNESIUM CHLORIDES
MAGNESIUM COMPOUNDS
MAGNESIUM OXIDES
MANGANESE CHLORIDES
MANGANESE COMPOUNDS
MANGANESE HALIDES
MINERALS
MIXTURES
OXIDE MINERALS
OXIDES
OXYGEN COMPOUNDS
PHASE TRANSFORMATIONS
PHYSICAL PROPERTIES
SOLID SOLUTIONS
SOLUTIONS
SPINELS
THERMAL DIFFUSION
THERMODYNAMIC PROPERTIES
TRANSITION ELEMENT COMPOUNDS
TRANSITION TEMPERATURE