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:
Mar. 25, 2014
Filed:
Jan. 08, 2009
Pu Zhang, Ann Arbor, MI (US);
Suresh Mani, Ann Arbor, MI (US);
Junqing MA, Ann Arbor, MI (US);
Liya Wang, Ann Arbor, MI (US);
Jun Q. Chin, Waterford, MI (US);
Pu Zhang, Ann Arbor, MI (US);
Suresh Mani, Ann Arbor, MI (US);
Junqing Ma, Ann Arbor, MI (US);
Liya Wang, Ann Arbor, MI (US);
Jun Q. Chin, Waterford, MI (US);
A123 Systems, Inc., Waltham, MA (US);
Abstract
A composite material having utility as an anode for lithium ion batteries comprises silicon, a transition metal, a ceramic and an electrically conductive diluent such as carbon. In particular instances, the ceramic is electrically conductive, and may comprise vanadium carbide or tungsten carbide. The transition metal may, in some instances, comprise iron. The material may be fabricated by grinding together a starting mixture of the components, and grinding may be accomplished in a high impact ball milling process, and the grinding step may cause partial alloying of the silicon with the metal and/or carbon. Further disclosed is a method for making the material as well as electrodes which incorporate the material.