Sony Corporation

Kazuhiko Soji

Tsuyoshi Sugiyama

Akira Sasaki

Hironori Shibata

Etsushi Yajima

An electrode capable of preventing variations in electrical performance to stabilize performance and improve yields is provided. An electrode structure includes: an electrode including an current collector and an active material layer arranged on the current collector; and an electrode lead arranged on the active material layer, wherein a hole is arranged so as to penetrate the electrode and the electrode lead, and the electrode and the electrode lead are folded back around the hole in a direction away from the hole so that the electrode is placed inside, and the thickness of the active material layer in a region where the electrode lead is not arranged is uniform, and the thickness of the active material layer in a region where the electrode lead is arranged is nonuniform.

Electrode structure and method of manufacturing the same, and battery and method of manufacturing the same

The present invention provides an electrode production method for producing an electrode including a rectangular electrode carrier and a gel electrolyte film formed on the electrode carrier and having a width greater than the electrode carrier. The method includes: an overlaying step for overlaying a first carrier having a greater width than the gel electrolyte film, a second carrier having a width approximately identical to that of the gel electrolyte film, and the electrode carrier in this order; a coating step for applying an electrolyte composition onto the first carrier, the second carrier, and the electrode carrier in such a manner that the applied electrolyte composition has a width greater than the width of the second carrier and smaller than the width of the first carrier; a first peel-off step for peeling off from the first carrier the second carrier and the electrode carrier; a gelatinization step for gelatinizing the electrolyte composition into a gel electrolyte film; and a second peel-off step for peeling off from the second carrier the gel electrolyte film and the electrode carrier. Thus, the gel electrolyte film can be formed on the electrode with a high accuracy.

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Fukushima, Japan

Kazuhiko Soji