Electrochemical studies on niobium triselenide cathode material for lithium rechargeable cells

Journal Article · Sun Jan 01 00:00:00 EST 1989 · J. Electrochem. Soc.; (United States)

DOI:https://doi.org/10.1149/1.2096616· OSTI ID:5780454

Ratnakumar, B V; Ni, C L; DiStefano, S; Nagasubramanian, G; Bankston, C P

Niobium triselenide offers promise as a high energy density cathode material for ambient temperature lithium rechargeable cells. The electrochemical behavior of NbSe/sub 3/ in the battery electrolyte, i.e., 1.5m LiAsF/sub 6//2 Me-THF is reported here. A detailed study has been carried out using various ac and dc electrochemical techniques to establish the mechanism of intercalation of three equivalents of Li with NbSe/sub 3/ as well as the rate governing processes in the reduction of NbSe/sub 3/. Based on the experimental data, an equivalent circuit has been formulated to represent the NbSe/sub 3/-solution interface. The kinetic parameters for the reduction of NbSe/sub 3/ were evaluated from the ac and dc measurements. Finally, the structural change in NbSe/sub 3/ on lithiation during initial discharge which results in higher cell voltages and different electrochemical response as compared to virgin NbSe/sub 3/ was identified to be a loss of crystallographic order, i.e., amorphous by x-ray diffraction.

• Research Organization: California Inst. of Tech., Pasadena, CA (USA). Karman Lab. of Fluid Mechanics and Jet Propulsion
• OSTI ID: 5780454
• Journal Information: J. Electrochem. Soc.; (United States), Vol. 136:1
• Country of Publication: United States
• Language: English

Related Subjects

25 ENERGY STORAGE
37 INORGANIC
ORGANIC
PHYSICAL AND ANALYTICAL CHEMISTRY
36 MATERIALS SCIENCE
CATHODES
MATERIALS TESTING
LITHIUM
CHEMICAL REACTION KINETICS
NIOBIUM SELENIDES
BATTERY CHARGING
CRYSTALLOGRAPHY
ELECTRIC BATTERIES
ELECTROCHEMISTRY
INTERFACES
MICROSTRUCTURE
PARAMETRIC ANALYSIS
SOLUTIONS
X-RAY DIFFRACTION
ALKALI METALS
CHALCOGENIDES
CHEMISTRY
COHERENT SCATTERING
CRYSTAL STRUCTURE
DIFFRACTION
DISPERSIONS
ELECTROCHEMICAL CELLS
ELECTRODES
ELEMENTS
KINETICS
METALS
MIXTURES
NIOBIUM COMPOUNDS
REACTION KINETICS
REFRACTORY METAL COMPOUNDS
SCATTERING
SELENIDES
SELENIUM COMPOUNDS
TESTING
TRANSITION ELEMENT COMPOUNDS
250903* - Energy Storage- Batteries- Materials
Components
& Auxiliaries
400400 - Electrochemistry
360202 - Ceramics
Cermets
& Refractories- Structure & Phase Studies