Nec Energy Devices, Ltd.

Aesc Japan Ltd.

Envision Aesc Japan Ltd.

Envision Aesc Energy Devices Ltd.

Ryota Yanagisawa

Takayuki Suzuki

Tomoyuki Ohta

Yoshimasa Yamamoto

A battery () includes a positive electrode () and a first insulating layer (). The positive electrode () includes a current collector () and a first active material layer (). The current collector () includes a first surface () and a second surface (). The second surface () is opposite to the first surface (). The first active material layer () is positioned over the first surface () of the current collector (). The first insulating layer () faces the first active material layer () of the positive electrode (). The first active material layer () contains at least one carbon. The first insulating layer () contains magnesium hydroxide particles. A product of an area density and a specific surface area of the magnesium hydroxide particles is equal to or greater than 0.20 times a sum of products of an area density and a specific surface area of each of the at least one carbon.

Battery

A method for manufacturing a lithium ion secondary battery, the lithium ion secondary battery including a positive electrode and a negative electrode disposed with a separator sandwiched therebetween and contained together with an electrolytic solution in an outer case including a flexible film, wherein the quantity of dissolved nitrogen in the electrolytic solution in injecting the electrolytic solution into the outer case is 100 &#x3bc;g/mL or less.

Lithium ion secondary battery and method for manufacturing same

Growing community of inventors

Kanagawa, Japan

Ryota Yanagisawa