Ricoh Company, Ltd.

Sachiko Yoneyama

Toshiyuki Kabata

Toshiyuki Ohsawa

Okitoshi Kimura

Masaki Yoshino

A negative electrode for a secondary battery which has a positive electrode including a polymer active material. The negative electrode includes: a current collector beforehand roughened at one surface thereof; a first layer disposed on the roughened one surface and including a material selected from the group consisting of alkali metal and an alloy containing alkali metal; and a second layer disposed on the first layer and including an ion conductive material. A surface of the first layer has an uneven configuration which conforms with another uneven configuration of the roughened one surface of the current collector, the surface of the first layer being in contact with the second layer. A method for manufacturing the negative electrode is also disclosed.

Negative electrode for secondary battery

A non-aqueous secondary battery comprises (i) an electroconductive or semiconductive polymeric material serving as an active material for a positive electrode, (ii) a negative electrode active material and (iii) an electrolytic solution comprising an electrolyte and a mixed solution of .gamma.-butyrolactone and a glyme. This secondary battery can be fabricated in the form of a flexible sheet.

Secondary battery

An electrochemical device is disclosed, which comprises at least a pair of electrodes; and a solid or solid-like composite electrolyte interposed therebetween, comprising substantially uniform spherical particles having no or substantially no electronic conductivity which are dispersed in the solid or solid-like composite electrolyte.

Electrochemical device

Sheet-shaped electrode, method or producing the same, and secondary

A composite sheet-shaped electrode comprising an aluminum collector and aniline type polymer serving as an active material, a secondary battery using the composite sheet-shaped electrode as the positive electrode thereof, and a method of preparing electrochemically the composite sheet-shaped electrode on the aluminum collector are disclosed.

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Yokohama, Japan

Sachiko Yoneyama