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:
Jul. 07, 2015
Filed:
Dec. 21, 2010
Sang-young Yoon, Bedford, MA (US);
Rocco Iocco, Beverly, MA (US);
Matthew Reynold Denlinger, Waltham, MA (US);
Sang-Young Yoon, Bedford, MA (US);
Rocco Iocco, Beverly, MA (US);
Matthew Reynold Denlinger, Waltham, MA (US);
A123 Systems LLC, Waltham, MA (US);
Abstract
The present disclosure relates to anode materials having high surface areas and improved cycle performance made by surface treatments of spheroidized graphite powders. The surface treatments provide a high surface area protective coating over the spheroidized graphite powder. The anodes made according to the disclosed embodiments have improved cycle life and long term high temperature storage performance. In the disclosed embodiments, a spheroidized graphite powder is coated with a high surface area protective coating. The high surface area protective coating improves the performance and durability of an anode made from disclosed material. The high surface area protective coating can include polymers, metal compounds and/or hard carbon. Further, in some embodiments, a protective coating, that may or may not have a high surface area but does have increased durability, can be formed by heat treating the spheroidized graphite in oxidizing or inert atmospheres.