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Synthesis and Characterization of Microcrystalline TiS2 for Use in Cathodes

Published online by Cambridge University Press:  25 February 2011

Edward J. Donahue ,
Lawrence A. Dominey ,
Victor R. Koch ,
Thomas J. Blakley  and
Jay L. Goldman
Edward J. Donahue
Affiliation:
Covalent Associates, Inc. 10 State Street, Woburn, MA 01801
Lawrence A. Dominey
Affiliation:
Covalent Associates, Inc. 10 State Street, Woburn, MA 01801
Victor R. Koch
Affiliation:
Covalent Associates, Inc. 10 State Street, Woburn, MA 01801
Thomas J. Blakley
Affiliation:
Covalent Associates, Inc. 10 State Street, Woburn, MA 01801
Jay L. Goldman
Affiliation:
Covalent Associates, Inc. 10 State Street, Woburn, MA 01801
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Abstract

Titanium disulfide is a particularly promising cathode material for very high cycle life applications in secondary lithium batteries due to the reversible nature of the intercalation of lithium into the host TiS2 lattice. It has long been known that the mechanical stress of the intercalation process is minimized if TiS2 crystal size is kept below 10μm. It has also been suspected that minimizing crystal thickness would improve the kinetics of at the onset of lithiation by minimizing the forces which would have to be overcome in expanding the host lattice. We have synthesized three different types of microcrystalline TiS2, two thin film and one powder, and have compared their performances to that of a large crystalline powder. Lithium ion diffusivity and pulse power performance of the four materials were compared. It was found that the two thin film materials exhibited extraordinary pulse power rate capabilities while the two powder materials were limited in their performance by the constraints of the composite cathode matrix.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 293: Symposium U – Solid State Ionics III , 1992 , 69
Copyright
Copyright © Materials Research Society 1993

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