Negative electrodes for lithium cells and batteries
AssigneeThe University of Chicago
InventorsJohn T. Vaughey, Linda M. L. Fransson, Michael M. Thackeray
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Abstract
A negative electrode is disclosed for a non-aqueous electrochemical cell. The electrode has an intermetallic compound as its basic structural unit with the formula M2M′ in which M and M′ are selected from two or more metal elements including Si, and the M2M′ structure is a Cu2Sb-type structure. Preferably M is Cu, Mn and/or Li, and M′ is Sb. Also disclosed is a non-aqueous electrochemical cell having a negative electrode of the type described, an electrolyte and a positive electrode. A plurality of cells may be arranged to form a battery.
Claims22
A negative electrode for a non-aqueous electrochemical cell having an active material consisting essentially of an intermetallic compound which is crystalline in its initial state having as its basic structural unit the formula M2M′ in which M and M′ are selected from two or more metal elements including Si, and the M2M′ structure is a Cu2Sb-type structure.
A negative electrode for a non-aqueous electrochemical cell having an active material consisting essentially of a compound which is crystalline in its initial state having as its basic structural unit the formula M2M′, and having a Cu2Sb-type structure, in which M is one or more metal elements and M′ is one or more metal or non-metal elements.
A non-aqueous electrochemical cell comprising a negative electrode, an electrolyte and a positive electrode the negative electrode having an active material consisting essentially an intermetallic compound which is crystalline in its initial state having as its basic structural unit the formula M2M′ in which M and M′ are selected from two or more metal elements including Si, and the M2M′ structure is a Cu2Sb-type structure.
A battery comprised of a plurality of cells, at least some cells including a negative electrode and a non-aqueous electrolyte and a positive electrode, said negative electrode having an active material consisting essentially of an intermetallic compound which is crystalline in its initial state having as its basic structural unit the formula M2M′ in which M and M′ are selected from two or more metal elements including Si, and having a Cu2Sb-type structure.
A non-aqueous electrochemical cell comprising a negative electrode, an electrolyte and a positive electrode, said negative electrode having an active material consisting essentially of an intermetallic compound which is crystalline in its initial state having as its basic structural unit the formula M2M′, and having a Cu2Sb-type structure, in which M is one or more metal elements and M′ is one or more metal or non-metal elements.
A battery comprising a plurality of cells, at least some cells including a negative electrode and a non-aqueous electrolyte and a positive electrode, said negative electrode having an active material consisting essentially of an intermetallic compound which is crystalline in its initial state having as its basic structural unit the formula M2M′, and the M2M′ structure is a Cu2Sb-type structure, in which M is one or more metal elements and M′ is one or more metal or non-metal elements.
A negative electrode for a non-aqueous electrochemical cell comprised of an intermetallic compound which is crystalline in its initial state having an x-ray diffraction pattern substantially the same as FIG. 3.
A negative electrode for a non-aqueous electrochemical cell comprised of an intermetallic compound which is crystalline in its initial state having an x-ray diffraction pattern substantially the same as FIG. 5.
Dependencies are inferred from the claim text.