Panasonic Corporation

Panasonic Intellectual Property Management Co., Ltd.

Hitoshi Katayama

Kazuyoshi Honda

Kazuya Iwamoto

Shuji Ito

Yasutaka Kogetsu

Taisuke Yamamoto

Keisuke Ohara

Masanori Sumihara

Yasuhiro Ueyama

Seiichi Kato

Takashi Nonoshita

Takeshi Kasamatsu

Shoichi Imashiku

The present invention relates to a current collector including a base portion with a flat face, primary projections projecting from the flat face, and secondary projections projecting from the top of the primary projections. The present invention also relates to a current collector including a base portion with a flat face and primary projections projecting from the flat face, wherein the roughening rate of the top of the primary projections is 3 to 20. By using such a current collector, separation of the active material from the current collector can be inhibited when using an active material that has a high capacity but undergoes a large expansion at the time of lithium ion absorption.

Electrode, and current collector used therefor

An electrodehas an active material layerformed on each of two whole main surfaces of a current collector. A part of an electrode leadoverlaps the electrode. One end face of the electrodein the width direction of the electrodeis flush with one end face of the electrode lead. Jointsare formed at the one end of the electrodein the width direction. The jointsjoin the electrodeand the electrode leadso as to provide electrical continuity between the exposed part of the current collectorat the one end face of the electrodein the width direction and the electrode lead. The jointsare formed, for example, by plasma welding.

Electrode structure for non-aqueous electrolyte secondary battery, method for producing the same, and non-aqueous electrolyte secondary battery

Growing community of inventors

Osaka, Japan

Hitoshi Katayama