The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
May. 28, 1996
Filed:
Nov. 15, 1993
On K Chang, San Jose, CA (US);
Joseph Lundquist, Gilroy, CA (US);
Other;
Abstract
A method of making a composition having lithium, transition metal and oxygen elements and preferably having vanadium as the transition metal with a unit structure of the nominal general formula LiV.sub.3 O.sub.8, such structure being able to accept lithium ions. The method as exemplified by the formation of Li.sub.1+x V.sub.3 O.sub.8 (0.ltoreq.x.ltoreq.0.2) comprises forming a mixture of intermingled particles of vanadium pentoxide (V.sub.2 O.sub.5) and lithium carbonate (Li.sub.2 CO.sub.3) each in an amount sufficient to provide a stoichiometric ratio of approximately 1:3 of lithium to vanadium respectively; compacting the particles by applying a compressive force to the intermingled particles; and heating the intermingled particles to an elevated temperature which is below the melting point of the LiV.sub.3 O.sub.8 product of the invention. The compacting and heating steps consolidate the particles into a densified body and cause diffusion of at least a portion of the elements across particle boundaries with release of carbon dioxide, thereby providing a lithium-vanadium-oxygen composition having a unit structure of Li.sub.1+x V.sub.3 O.sub.8.