Agency of Industrial Science and Technology

Imra Material R & D Co., Ltd.

Kabushiki Kaisha Toyoda Jidoshokki Seisakusho

Agency of Industrial Science and Technology Ministry of International

Fukuda Metal Foil & Powder Co., Ltd.

Director General Agency of Industrial Science and Technology

Government Industrial Research Institute

Itsuki Uehara

Tetsuo Sakai

Hiroshi Miyamura

Nobuhiro Kuriyama

Hideaki Tanaka

Hiroshi Ishikawa

Masanori Nakane

Yoshizo Miyake

Makoto Tsukahara

Kunio Takahashi

Eiichi Ishii

Akihito Isomura

Takahiro Mishima

Mitsuharu Muta

Hiroyuki Takeshita

Abdulkarim Kadir

Hiroshi Yoshinaga

Masasi Wada

An AB,C,-type ternary hydrogen storage alloy comprising an AB,C,phase as main ingredient, where A comprises at least one of a rare-earth element and Ca, B mainly comprises Mg, and C comprises at least one of transition metal elements of Cu, Ni, Co, Fe, Cr, Mn, Ti, V and Zn, and x and y represent values within the-ranges of 1.5&lE;x&lE;2.5 and 1.5 &lE;y&lE;3.5, respectively; and an AB,C,-type ternary hydrogen storage alloy comprising an AB,C,phase as a main ingredient, where A comprises at least one of a rare-earth element and Ca, B mainly comprises Mg, and C comprises at least one of transition metal elements of Cu, Ni, Co, Fe, Cr, Mn, Ti, V and Zn, each of which has large hydrogen storage capability and desorbing amount per unit weight and hydrogen storage characteristics excellent in reversibility of the hydrogen absorption and desorption and is provided by improving the stability in a hydride state of an alloy mainly comprising a lightweight metal element and increasing the hydrogen dissociation pressure of the hydride.

Ternary hydrogen storage alloy and process for production thereof

The primary object of the present invention is to provide an electrode for an alkali secondary battery, the electrode being capable of exhibiting high binding power and showing a high electrical conductivity without use of a binder. An electrode for an alkali secondary battery, the electrode comprising a molded product molded from a mixture containing an active material-containing powder and a flaky nickel powder which has lowered strain.

Electrode for alkali secondary battery and method for producing the same

The calcium-aluminum system hydrogen absorbing alloy of the present invention is an alloy which is composed of a mixture P of Ca with Mg and an Al base alloy Q, has a molar ratio P:Q of 1:1.5 to 2.8 and shows a Laves phase with the C15-type structure as the fundamental structure thereof.

Calcium-aluminum system hydrogen absorbing alloy

Disclosed are a hydrogen-occluding alloy electrode comprising an alloy powder wherein the alloy comprises a Ti-V solid solution mother phase and a secondary phase predominantly containing a Ti-Ni phase or an AB.sub.2 Laves phase in which the secondary phase forms a three-dimensional reticulate skeleton in the alloy; said hydrogen-occluding alloy powder surface-treated with hydrofluoric acid, to provide a titanium hydride surface and surface-coated with at least one metal of Ni, Cu and Co.

Hydrogen-occluding alloy and hydrogen-occluding alloy electrode

A hydrogen occlusion electrode comprising a compact of a mixture powder including a titanium-nickel alloy which contains oxygen.

Hydrogen occlusion electrode

Disclosed are a hydrogen-occluding alloy electrode comprising an alloy powder wherein the alloy comprises a Ti--V solid solution mother phase and a secondary phase predominantly containing a Ti--Ni phase or an AB.sub.2 Laves phase in which the secondary phase forms a three-dimensional reticulate skeleton in the alloy; said hydrogen-occluding alloy powder surface-treated with hydrofluoric acid to provide a titanium hydride surface and surface-coated with at least one metal of Ni, Cu and Co.

The calcium-aluminum system hydrogen absorbing alloy of the present invention is an alloy which is composed of a mixture P of Ca with (optional) Mg and an Al base alloy Q, has a molar ratio P:Q of 1:1.5 to 2.8 and shows a Laves phase with the C15-type structure as the fundamental structure thereof.

A hydrogen storage electrode for use as an anode of an alkaline battery and a process for producing such electrode are disclosed. According to the process, firstly particles of hydrogen storage alloy powder with maximum particle size of 50 .mu.m is prepared. The alloy powder particles are then made into microcapsules by electroless plating with copper amounting to 10%-20% by weight with respect to the sum of the alloy powder and the plating copper. With an electric current collector placed in contact with the copper-plated alloy powder set in a die cavity of a molding press, the molding dies are closed to press and the copper-plated powder and the current collector for bonding them together thereby to form the hydrogen storage electrode. Pressure exerted during the pressing is applied to such an extent that the porosity of the resulting compact of the pressed alloy powder falls in the range of 10% to 25%.

Hydrogen storage electrode and process for producing the same

An indium oxide (III) film produced by a method which comprises first forming a film of indium oxide (I) and subsequently oxidizing the film.

Method for manufacture of indium oxide (III) film

A method for efficient production of hydrogen by thermochemical decomposition of water by use of tri-iron tetraoxide and hydrogen bromide as main cyclic reaction media.

Growing community of inventors

Ikeda, Japan

Itsuki Uehara