Lithium titanate and method of forming the same

Details Lithium titanate and method of forming the same Lithium titanate and method of forming the same

2006-08-04

2009-06-02

Vanoy, Timothy C (Department: 1793)

Chemistry of inorganic compounds

Oxygen or compound thereof

Metal containing

C423S069000, C423S071000, C429S006000, C429S047000, C429S209000, C429S231100, C429S231500, C429S234000, C180S313000

Reexamination Certificate

active

07541016

ABSTRACT:
A lithium titanate has the following formula:in-line-formulae description="In-line Formulae" end="lead"?Li4Ti5O12−xin-line-formulae description="In-line Formulae" end="tail"?wherein x is greater than 0. The lithium titanate is formed by providing a mixture of titanium dioxide and a lithium-based component. The mixture is sintered in a gaseous atmosphere comprising a reducing agent to form the lithium titanate having the above formula. A lithium-based cell includes an electrolyte, an anode, and a cathode, with at least one of the anode and the cathode comprising the lithium titanate having the above formula. The lithium titanate is deficient of oxygen, which increases electronic conductivity of the lithium titanate by at least three orders over electronic conductivity of a stoichiometric lithium titanate, while avoiding loss of reversible electric power-generating capacity that typically occurs when doping is used to replace titanium in the lithium titanate with atoms that provide higher electronic conductivity.

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