To provide a negative electrode and a battery using it for suppressing a structural breakdown accompanied by charge and discharge of a negative electrode active material layer and reducing reactivity of an electrolyte and the material layer.
The negative electrode has a negative electrode current collector, and a negative electrode active material layer 12 formed on the collector by a gas phase method. The material layer 12 has a plurality of first layers 12a and second layers 12B containing Si and differently containing an oxygen content, respectively, by alternately laminating. The first layer 12A contains an element or an alloy of Si as a negative electrode active material. The second layer 12B contains Si and oxygen as an oxide, and the content of oxygen is preferably ≥10 atom%.
COPYRIGHT: (C)2005,JPO&NCIPI
Tomoo Takada
Konishi Ike
Yukiko Iijima
Yukio Miyaki
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