Fdk Corporation

Yusuke Shingai

Masaru Kihara

Jun Ishida

Akira Saguchi

Takuya Kai

Takeshi Kajiwara

A nickel hydrogen secondary battery accommodates an electrode group including a positive electrode and a negative electrode which are stacked one on top of another through a separator, together with an alkaline electrolyte. The battery contains Li, with a total amount of Li in the batteryof 15 to 50 mg/Ah, as determined as the mass in terms of LiOH per Ah of the positive electrode capacity. The negative electrode includes particles of rare earth-Mg&#x2014;Ni-based hydrogen storage alloy which contains a rare earth element, Mg and Ni. The hydrogen storage alloy particlesincludes, on the surface thereof, a rare earth hydroxide which is the hydroxide of a rare earth element and has a specific surface area of 0.1 to 0.5 m/g.

Growing community of inventors

Tokyo, Japan

Yusuke Shingai