Panasonic Corporation

Matsushita Electric Industrial Co., Ltd.

Yumi Kondo

Masaki Aoki

Kunihiro Ukai

Junichi Hibino

Kazuhiko Sugimoto

Yoshinori Tanaka

Hiroshi Setoguchi

Teppei Hosokawa

Norihisa Mino

Nobuhiko Hojo

Hidenobu Wakita

Kiyoshi Taguchi

Seiji Fujihara

Taisuke Yamamoto

Yukimune Kani

Aoi Tanaka

A hydrogen generator that is able to maintain an ability to supply a reformed gas containing less CO for a long time period while dealing with degradation of a catalytic activity of a shift reaction by a reliable and simple method, an operation method thereof, and a fuel cell system are provided. In a hydrogen generator () comprising a reformer (), a shift converter (), a water supply device (A), a material feed device (A), and a controller (), the controller () is configured to count the number of times of start-up and/or stop of said hydrogen generator () and to increase a temperature or a S/C ratio of the reformed gas flowing in said shift converter () according to the counted number of times of start-up and/or stop.

Hydrogen generator, method of operating hydrogen generator, and fuel cell system

A fuel cell system includes a hydrogen generator that generates hydrogen by a reforming reaction using a material and water. A fuel cell generates power by electrochemical reaction using the hydrogen and an oxidizing agent. A cooling water circulation portion circulates water for cooling the fuel cell. A water condenser condenses water discharged from the hydrogen generator or the fuel cell and the condensed water is stored in a water storage portion. A water supply portion moves the water from the water storage portion to the hydrogen generator, the fuel cell, or the cooling water circulation portion. A water replenishment portion replenishes water in the water storage portion from the cooling water circulation portion. A controller discards the water from the water storage portion through a discharge port and the water replenishment portion causes the cooling water circulation portion to replenish the water storage portion.

Fuel cell system

A cell according to the present invention is a fuel cell for generating an electric power by supplying one electrode with a fuel and the other electrode with an oxidant. In the fuel cell, a catalyst layer is formed on at least one surface of at least one of the one electrode and the other electrode. The catalyst layer is a layer including catalyst particles alone, a layer including a mixture of the catalyst particles and other particles, or a layer of a porous film carrying at least the catalyst particles, and a molecule including an ion-conducting functional group serving as an electrolyte is chemically bonded to a surface of at least one selected from the group consisting of the catalyst particles, the other particles and the porous film. At least one of the electrodes has a thin film electrolyte, a catalyst and an electron conducting substance, thereby suppressing the elution of the electrolyte from the catalyst layer in an electrode part and the accompanying voltage drop.

Fuel cell for generating electric power

Disclosed here is a plasma display unit that employs phosphors having an amount of charge controlled close to zero, by which degradation in luminance, color temperature, and charge characteristics can be minimized. A phosphor bearing positive or negative charge is coated with a compound for controlling the amount of charge of the phosphor through a strong chemical bonding, whereby the amount of charge of a phosphor can be suppressed within &#xb1;0.01 &#x3bc;C/g. Controlling the amount of charge of phosphors close to zero can keep impurity gases away from the phosphor particle when the panel is in operation, suppressing problems critical to driving a plasma display unit, such as luminance degradation of phosphors, improper alignment of color in panel operation, luminance degradation when the panel displays all white.

Phosphor and plasma display unit

The present invention provides a plasma display panel that suppresses discharge sustain voltage, and reduces brightness degradation of a phosphor. In the plasma display panel, as protective film () made of magnesium oxide (MgO) formed on dielectric glass layer (), protective film () made of magnesium oxide (MgO) with oxide added with an electronegativity of 1.4 or higher, is formed to suppress impure gas adsorption by protective film (), stabilizes discharge sustain voltage, and reduces brightness degradation.

Plasma display panel having a magnesium oxide protective film and method for producing same

Growing community of inventors

Osaka, Japan

Yumi Kondo