Nonaqueous electrolyte secondary battery

The present invention provides a non-aqueous electrolyte secondary battery having high energy density and satisfactory cycle performance by using an alloy comprising Ni and Sn as a negative active material. The non-aqueous electrolyte secondary battery comprises a negative electrode with a composite...

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Bibliographic Details
Main Author YAMATE SHIGEKI
Format Patent
LanguageEnglish
Published 09.05.2007
Subjects
BASIC ELECTRIC ELEMENTS
ELECTRICITY
PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSIONOF CHEMICAL INTO ELECTRICAL ENERGY
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Summary:The present invention provides a non-aqueous electrolyte secondary battery having high energy density and satisfactory cycle performance by using an alloy comprising Ni and Sn as a negative active material. The non-aqueous electrolyte secondary battery comprises a negative electrode with a composite layer containing a negative active material, a positive electrode and a non-aqueous electrolyte. The negative active material consists of an alloy containing 5 to 25 mass % of nickel and 75 to 95 mass % of tin and the alloy contains Sn4Ni3 phase and Sn phase. It is preferable that the content ratio of Sn4Ni3 phase and Sn phase in the alloy be 0.2 Z 3, when m1 is the mass of Sn4Ni3 phase, m2 is the mass of said Sn phase, and Z=ml /m2; and that the composite layer contain carbon material.
Bibliography:Application Number: CN20038017395