Panasonic Intellectual Property Management Co., Ltd.

Panasonic Corporation

Toto Ltd.

Yuichi Mikami

Tomohiro Kuroha

Yuji Okuyama

Shigenori Onuma

Kosuke Yamauchi

Yoichiro Tsuji

Atsuo Okaichi

Takashi Kakuwa

Tomoya Kamata

Takehito Goto

Osamu Sakai

Noboru Taniguchi

Yukimune Kani

Toshiharu Otsuka

Hiroshi Asano

Hiroshi Shirahama

Yasushi Kaneko

Toru Sukawa

Takeshi Terayama

Kosuke Nunoo

Kyohei Kawada

A proton conductor of the present disclosure includes a compound represented by the chemical formula BaZrYbScO. The chemical formula satisfies 0<x<0.5, 0 <y<0.5, (x+y)<0.5, and 0<δ<0.5.

Proton conductor, electrolyte membrane, membrane electrode assembly, electrochemical cell and fuel cell stack

A membrane electrode assembly of an electrochemical device includes a proton conductive solid electrolyte membrane and an electrode including Ni and an electrolyte material which contains as a primary component, at least one of a first compound having a composition represented by BaZrMO(Mrepresents at least one element selected from trivalent elements each having an ion radius of more than 0.720 A&#xb0; to less than 0.880 A&#xb0;, and 0&#x3c;x&#x3c;1 holds) and a second compound having a composition represented by BaZrTmO(0&#x3c;x&#x3c;0.3 holds).

Membrane electrode assembly of electrochemical device, membrane electrode assembly of fuel cell, fuel cell, membrane electrode assembly of electrochemical hydrogen pump, electrochemical hydrogen pump, membrane electrode assembly of hydrogen sensor, and hydrogen sensor

A fuel cell system includes a fuel feeder that supplies fuel, a fuel cell stack that generates power through an electrochemical reaction using air and a hydrogen-containing gas generated from the fuel, a first temperature sensor that senses the temperature of the fuel cell stack, and a controller. The fuel cell stack has a membrane electrode assembly including an electrolyte membrane through which protons can pass, a cathode on one side of the electrolyte membrane, and an anode on the other side of the electrolyte membrane. The controller defines an upper limit of current output from the fuel cell stack on the basis of the temperature of the fuel cell stack, the supply of the fuel, and the hydrogen consumption of the fuel cell stack associated with internal leakage current and keeps the current output from the fuel cell stack at or below the upper limit.

Fuel cell system and method for operating the same

A fuel cell system includes: a fuel cell stack including a plurality of cells, each of which has a fuel electrode, an air electrode, and an electrolyte, and performs a power generation by a reaction between a fuel gas and air; a fuel supplier supplying the fuel gas to the fuel electrode; an air supplier supplying the air to the air electrode; a voltage detector detecting the voltage of the fuel cell stack; and a controller stopping the supplying of the fuel gas by the fuel supplier and the supplying of the air by the air supplier when the voltage of the fuel cell stack detected by the voltage detector is decreased to be lower than a threshold voltage after the power generation of the fuel cell stack is stopped.

A SOFC system includes: a fuel cell stack; a reformer; an air supplier: a combustor; and a controller. In a stop control of the above system, the controller calculates an average of ratios of the air to the raw material supplied to the reformer as a first average, in a case in which a molar fraction of a hydrogen component in the anode off-gas is higher than a molar fraction of a raw material component in the anode off-gas, and calculates the average of the ratios of the air to the raw material supplied to the reformer as a second average, in a case in which the molar fraction of the hydrogen component in the anode off-gas is lower than the molar fraction of the raw material component in the anode off-gas. The controller controls the air supplier so that the first average is higher than the second average.

Solid oxide fuel cell system

A proton conductor of the present disclosure has a composition formula of BaZrYbNiO(0.95&#x2264;a&#x2264;1.05, 0.1&#x2264;x&#x2264;0.4, and 0.15&#x2264;y&#x2264;0.30).

Proton conductor and membrane electrode assembly

A fuel cell system includes: a reformer generating a reformed gas using a raw material; a fuel cell generating electric power; a raw material supply passage; a hydro-desulfurizer operative to remove sulfur component in the raw material; a recycle passage through which the reformed gas is supplied to the raw material supply passage provided upstream of the hydro-desulfurizer; a temperature detector detecting a temperature of the hydro-desulfurizer; and a controller, wherein: when the temperature of the hydro-desulfurizer reaches a predetermined temperature, the controller increases a flow rate of the raw material from a predetermined flow rate by a flow rate corresponding to a flow rate of the recycled gas, and then, the controller starts supplying the recycled gas to the recycle passage; and after the recycled gas reaches an upstream end of the recycle passage, the controller returns the flow rate of the raw material to the predetermined flow rate.

Fuel cell system

Growing community of inventors

Kyoto, Japan

Yuichi Mikami