Musashi Energy Solutions Co., Ltd.

Nobuo Ando

Hiroyuki Miyauchi

Masaya Naoi

Kazunari Aita

Hiroki Yakushiji

Kenji Kojima

Masahiro Yamamoto

Hirobumi Suzuki

A power storage device may include an electrode assembly including a positive electrode, a separator, and a negative electrode, and an electrolyte solution. The negative electrode comprises a negative electrode current collector and a negative electrode active material layer. The active material layer comprises a surplus region A not facing the positive electrode active material layer, an end region B facing a region in the positive electrode active material layer, the region extending from an end of the positive electrode active material layer toward a center of the positive electrode active material layer by a length of 5% of a length from the center to the end, and a center region C. A negative electrode potential VA and a negative electrode potential VC after the positive electrode and the negative electrode are short-circuited satisfy: (1) VA≤2.0 V; (2) VC≤1.0 V; and (3) VA/VC≥0.7.

Power storage device including negative electrode having end region for reducing lithium precipitation not facing positive electrode

A doped electrode is manufactured by an electrode manufacturing method. The doped electrode includes an active material doped with an alkali metal. In the electrode manufacturing method, a dope solution is brought into contact with an electrode. The electrode includes a current collector and an active material layer. The active material layer is formed on a surface of the current collector and includes the active material. The dope solution includes an alkali metal ion and flows. In the electrode manufacturing method, for example, the alkali metal is electrically doped to the active material using a counter electrode member arranged to face the electrode.

Method for manufacturing doped electrode and method for manufacturing power storage device

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Minato-ku, Japan

Nobuo Ando