Nec Corporation

Ikiko Yamazaki

Koji Utsugi

Hironori Yamamoto

Yutaka Bannai

Mitsuhiro Mori

Tamaki Miura

Mariko Miyachi

Jiro Iriyama

Yuki Kusachi

Hidemasa Kawai

A vacuum deposition apparatus is used for deposit evaporated substance from evaporation sources (and) on the desired position of a flexible substrate (). While the flexible substrate () is carried using rollers in a vacuum, shutters (and) are opened and closed to control the movement of the evaporated substance via openings. A film having a desired shape of pattern is formed on the flexible substrate () with higher controllability.

Device and method for vacuum film formation

An object of the present invention is to provide a negative electrode for a secondary battery which has large capacity and restrains a rise in resistance inside the battery and reduction in capacity even after cycles and the secondary battery using the same. A first active material layercomprising members occluding and releasing Li onto a collectoris formed and a second active material layeras an alloy layer containing metal forming alloy with lithium or lithium and metal not-forming alloy with lithium is formed thereon. The secondary battery is constituted using the negative electrode.

Secondary battery-use negative electrode and secondary battery using it

The present invention provides a technology of inhibiting the decomposition of the solvent of the electrolyte solution for the secondary battery. Further, the present invention provides a technology of prohibiting the resistance increase of the secondary battery and improving the storage properties such as improving the capacity retention ratio. The electrolyte solutioncomprising non-proton solvent and cyclic sulfonic ester including at least two sulfonyl groups may be used.

Electrolyte solution for secondary battery and secondary battery using the same

An anode with a multi-layer structure including a first layer () having carbon as a main component, and a second layer () having lithium-ion conductivity and including a material as a main component thereof which can insert and extract lithium ions, or a multi-layer structure including a third layer () containing lithium in addition to the first layer and the second layer, and a lithium secondary battery including the same. The lithium secondary battery can be provided in which the battery capacity is substantially enhanced in the voltage range where the battery is actually used while maintaining the higher charge-discharge efficiency and the excellent cycle performance.

Growing community of inventors

Tokyo, Japan

Ikiko Yamazaki