Patent ID: 6653019
Filing Date: 2003-11-25
Classification: H01M,Y02E

Abstract:
A non-aqueous electrolyte secondary battery having a non-aqueous electrolyte, separator, and positive and negative electrodes capable of intercalating and de-intercalating lithium, said negative electrode including composite particles including at least one element selected from tin, silicon, and zinc as a constituent element thereof and at least one of:(a) a solid solution of said constituent element and at least one element selected from groups consisting of Group 2 elements, transition elements, Group 12, Group 13, and Group 14 elements in a Periodic Table except for said constituent element and carbon; and (b) an inter-metallic compound of said constituent element and at least one element selected from groups consisting of Group 2 elements, transition elements, Group 12, Group 13, and Group 14 elements in the Periodic Table except for said constituent element and carbon, covering said particles entirely or partly, said electrode material includes an amount of lithium which produces a plurality of NMR signals between âˆ’10 to 40 ppm with at least one signal between âˆ’10 to 4 with respect to a reference of lithium chloride.