Gs Yuasa International Ltd.

Minoru Teshima

Sumio Mori

Akihiko Miyazaki

Taro Yamafuku

Katsushi Nishie

Toru Tabuchi

Toshiyuki Aoki

The present invention provides a non-aqueous electrolyte secondary battery including a positive electrode, a negative electrode having a negative active material, and a non-aqueous electrolyte, characterized in that the negative active material contains composite particle (C), which has silicon-containing particle (A) and electronic conductive additive (B), the silicon-containing particle (A) has a content of carbon, and when measured at a temperature rising rate of 10&#xb1;2&#xb0; C./min by thermogravimetry, said composite particle (C) exhibits two stages of weight loss in the range of 30 to 1000&#xb0; C.

Non-aqueous electrolyte secondary battery

A separator for a battery according to the present disclosure (present separator) is held between a positive electrode and a negative electrode of the battery and includes an inorganic layer formation part and an inorganic layer non-formation part formed at an end. In addition, a nonaqueous electrolytic secondary battery according to the present disclosure includes: an electrode assembly including: a positive electrode having an active material layer including a positive electrode active material and a positive electrode current collector foil exposure part; a negative electrode having an active material layer including a negative electrode active material and a negative electrode current collector foil exposure part; and the present separator held between the positive electrode and the negative electrode; a case for housing the electrode assembly; and an electrolyte held between the positive electrode and the negative electrode.

Separator and nonaqueous electrolytic secondary battery including the same

An object is to provide an electrode assembly for an electric storage device, such as a nonaqueous electrolyte cell, and an electric storage device that are capable of preventing increase of a short-circuit current at the time of occurrence of a short-circuit within a cell and have high safety. In order to achieve the object, provided is an electrode assembly for an electric storage device including a positive electrode, a negative electrode and a separator disposed between the positive electrode and the negative electrode, in which at least one of the positive electrode and the negative electrode includes a current collector, an active material layer formed on at least one face of the current collector, and an undercoat layer formed between the current collector and the active material layer and including an organic binder that evaporates and decomposes when heated to a predetermined temperature or more.

Growing community of inventors

Kyoto, Japan

Minoru Teshima