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, 2012
Filed:
Sep. 17, 2007
Yet-ming Chiang, Framingham, MA (US);
Sung-yoon Chung, Incheon, KR;
Jason T. Bloking, Mountain View, CA (US);
Anna M. Andersson, Vasteras, SE;
Yet-Ming Chiang, Framingham, MA (US);
Sung-Yoon Chung, Incheon, KR;
Jason T. Bloking, Mountain View, CA (US);
Anna M. Andersson, Vasteras, SE;
Massachusetts Institute of Technology, Cambridge, MA (US);
Abstract
A compound comprising a composition A(M'M″)(XD), A(M′M″)(DXD), or A(M′M″)(XD), and have values such that x, plus y(1−a) times a formal valence or valences of M′, plus ya times a formal valence or valence of M″, is equal to z times a formal valence of the XD, XD, or DXDgroup; or a compound comprising a composition (AM″)M′(XD), (AM″)M′(DXD)(AM″)M′(XD)and have values such that (1−a)plus the quantity ax times the formal valence or valences of M″ plus y times the formal valence or valences of M′ is equal to z times the formal valence of the XD, XDor DXDgroup. In the compound, A is at least one of an alkali metal and hydrogen, M′ is a first-row transition metal, X is at least one of phosphorus, sulfur, arsenic, molybdenum, and tungsten, M″ any of a Group IIA, IIIA, IVA, VA, VIA, VIIA, VIIIA, IB, IIB, IIIB, IVB, VB, and VIB metal, D is at least one of oxygen, nitrogen, carbon, or a halogen, 0.0001<a≦0.1, and x, y, and z are greater than zero. The compound can have a conductivity at 27° C. of at least about 10S/cm. The compound can be a doped lithium phosphate that can intercalate lithium or hydrogen. The compound can be used in an electrochemical device including electrodes and storage batteries and can have a gravimetric capacity of at least about 80 mAh/g while being charged/discharged at greater than about C rate of the compound.