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:
Apr. 03, 2001
Filed:
Sep. 01, 1998
Steven J. Visco, Berkeley, CA (US);
May-Ying Chu, Oakland, CA (US);
PolyPlus Battery Company, Inc., Berkeley, CA (US);
Abstract
Disclosed is a redox electrode for a battery cell that has a coating to mitigate plugging by precipitated discharge products. The coating comprises a mixed ionic electronic conductor (MIEC) which is applied to the surface of a redox electrode. The presence of the MIEC coating allows for rapid removal of discharge product precipitates from redox electrodes since it is capable of conducting both electrons and ions. As a result, the chemical action necessary to remove such precipitates may take place on both the electrolyte side of the precipitate and at the precipitate/electrode interface. MIEC coatings in accordance with the present invention may be composed of any suitable material having ionic conductivity for a metal ion in a negative electrode with which the redox electrode is to be paired in a battery cell, and reversible redox capacity. Examples include titanium sulfide (TiS,), iron sulfide (FeS,), and cobalt oxides.