Mitsui Minings & Melting Co., Ltd.

Hitohiko Honda

Kiyotaka Yasuda

Yoshiki Sakaguchi

Tomoyoshi Matsushima

Makoto Dobashi

Akihiro Modeki

Kazuko Taniguchi

Takeo Taguchi

Masahiro Hyakutake

Shinichi Musha

Yoshiki Sakaguschi

A negative electrodefor a nonaqueous secondary battery, has an active material layercontaining active material particles. The active material layerhas a metallic materialdeposited among the particles by electroplating. The negative electrodehas a large number of holesopen on at least one side thereof and extending through the thickness of the active material layer. The negative electrodefurther has a pair of current collecting layersandadapted to be brought into contact with an electrolyte. The active material layeris between the current collecting layersand. The holesopen on the negative electrodepreferably have an opening area ratio of 0.3% to 30%. At least one of the pair of the current collecting layersandpreferably has a thickness of 0.3 to 10 &#x3bc;m.

Negative electrode for nonaqueous secondary battery

A negative electrode for a non-aqueous electrolyte secondary cell includes a current collector an, formed on a surface or both surfaces thereof, an active material structure containing an electroconductive material with a low capability of forming a compound with lithium, and the active material structure includes 5% to 80% by weight of active material particles containing a material having a high capability for forming a compound with lithium. The active material structure can include an active material layer containing the active material particles and a surface-covering layer on the active material layer.

Negative electrode for nonaqueous secondary battery, process of producing the negative electrode, and nonaqueous secondary battery

A negative electrodefor nonaqueous secondary batteries characterized by having an active material layerand a metallic lithium layerboth between a pair of current collecting surface layers. The negative electrodehas two negative electrode precursorseach composed of the current collecting surface layerand the active material layeron one side of the surface layer. The two negative electrode precursorsare united with their active material layersfacing each other and with the metallic lithium layersandwiched therebetween. A metallic material having low capability of forming a lithium compound penetrates through the whole thickness of the active material layer

Negative electrode for nonaqueous secondary battery and process of producing the same

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Ageo, Japan

Hitohiko Honda