Gs Yuasa International Ltd.

Xiamen Tungsten Co., Ltd.

Daisuke Okuda

Manabu Kanemoto

Mitsuhiro Kodama

Tadashi Kakeya

Hideto Watanabe

Zhen Lin

Peng Zhang

Jinhong Yang

Wenlian Qian

Long Jiang

Provided is a hydrogen storing alloy represented by the general formula:

Hydrogen storing alloy, electrode, and nickel-hydrogen storage battery

This disclosure provides a hydrogen storing alloy and a production method thereof. The hydrogen storing alloy has a chemical composition of a general formula RMgNi, wherein R is one or more elements selected from rare earth elements comprising Y, x satisfies 0.05&#x2264;x&#x2264;0.3, and y satisfies 2.8&#x2264;y&#x2264;3.8. The ratio of the maximal peak intensity present in a range of 2&#x3b8;=31&#xb0;-33&#xb0; to the maximal peak intensity present in a range of 2&#x3b8;=41&#xb0;-44&#xb0; is 0.1 or less (including 0), as measured by X-ray diffraction in which a Cu&#x2014;K&#x3b1; ray is set as an X-ray source.

Hydrogen storing alloy and production method thereof

A battery includes a cylindrical battery case and an electrode group including a positive electrode, a negative electrode, and a separator. The electrode group and the battery case define a space communicated from a top to a bottom, and one of the positive electrode and the negative electrode has a current collecting terminal that extends from the electrode group in a direction away from a center axis of the battery case and is in contact with a bottom surface of the battery case.

Cylindrical battery

A battery includes: a cylindrical battery case; and an electrode body disposed in the battery case, and including a positive plate, a negative plate, and a separator disposed between the positive plate and the negative plate. A spacer formed of a dense body and an electrolyte storage space storing an electrolyte are provided between the electrode body and the battery case on one end or both ends of the battery case in an axial direction of the electrode body.

Battery

An energy storage device including: a cylindrical case having at least one end closed; and an electrode assembly housed in the case. A reduced-diameter portion, at which an outer diameter of the case is reduced, is formed at the closed end of the case.

Energy storage device and manufacturing method of the same

A nickel-metal hydride storage battery includes a negative electrode containing a hydrogen storage alloy and an electrolyte solution. The hydrogen storage alloy has a CaCu5-type crystal structure and contains at least a Ni element and a rare earth element. The rare earth element is partly substituted with an Y element, and the electrolyte solution contains NaOH in an amount of 2.0 M or more.

Nickel-metal hydride storage battery including negative electrode containing yttrium substituted hydrogen storage alloy and electrolyte solution containing sodium hydroxide

Growing community of inventors

Kyoto, Japan

Daisuke Okuda