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:
Oct. 30, 2018
Filed:
Dec. 20, 2012
Envia Systems, Inc., Newark, CA (US);
Charles A. Bowling, Palo Alto, CA (US);
Subramanian Venkatachalam, Pleasanton, CA (US);
Herman A. Lopez, Sunnyvale, CA (US);
Sujeet Kumar, Newark, CA (US);
ENVIA SYSTEMS, INC., Newark, CA (US);
Abstract
A positive electrode active material comprising a lithium rich metal oxide active composition coated with aluminum zinc oxide coating composition is disclosed. The aluminum zinc oxide can be represented by the formula AlZnO, where x is from about 0.01 to about 0.6. In some embodiments, the material can have an average voltage that is very stable with cycling, and a specific capacity of at least about 175 mAh/g and an average voltage of at least about 3.55V discharged at a rate of C/3 from 4.6V to 2V against lithium. The material can further comprise an overcoat of metal halide over the aluminum zinc oxide coating. In some embodiments, the material can have from about 1 mole percent to about 15 mole percent aluminum zinc oxide coating and from about 0.5 mole percent to about 3 mole percent aluminum halide overcoat.