Invention Grant
US07824801B2 Negative electrode for lithium ion secondary battery, production method thereof and lithium ion secondary battery comprising the same 有权
锂离子二次电池用负极及其制造方法以及包含该锂离子二次电池的锂离子二次电池

Negative electrode for lithium ion secondary battery, production method thereof and lithium ion secondary battery comprising the same
Abstract:
A negative electrode for a lithium ion secondary battery including a current collector and an active material layer carried on the current collector, wherein the active material layer includes a first layer and a second layer alternately laminated in a thickness direction of the active material layer, and wherein the first layer includes silicon or silicon and a small amount of oxygen and the second layer includes silicon and a larger amount of oxygen than the first layer. With the use of the negative electrode, it is possible to provide a high capacity lithium ion secondary battery having excellent high rate charge/discharge characteristics and superior cycle characteristics.
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