Panasonic Intellectual Property Management Co., Ltd.

Panasonic Corporation

Sakai Chemical Industry Co., Ltd.

Tomohiro Kuroha

Noboru Taniguchi

Kenichi Tokuhiro

Takaiki Nomura

Takahiro Suzuki

Shigenori Onuma

Yuichi Mikami

Tomoya Kamata

Shuzo Tokumitsu

Kazuhito Hatoh

Yuji Okuyama

Takehito Goto

Takashi Kakuwa

Kazuhito Hato

Kosuke Yamauchi

Yoichiro Tsuji

Atsuo Okaichi

Hiromi Kita

Satoru Tamura

Masatoshi Nakamura

Hiroshi Asano

Keita Kobayashi

Shinji Nakahara

Akio Nakashima

Takeshi Terayama

Kosuke Nunoo

Kyohei Kawada

Shinsuke Takeguchi

Yasushi Sugawara

Yukimune Kani

Mitsuo Yoshimura

Nobuhiro Miyata

Hideaki Murase

Hiroshige Matsumoto

Norihiro Miyamura

Satoshi Otani

Kaori Takeuchi

Noburu Taniguchi

Takaika Nomura

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

The electrolyte membrane of the present disclosure includes a plurality of crystal domains. At least one of the crystal domains includes a first crystal subdomain and a second crystal subdomain. Each of the first crystal subdomain and the second crystal subdomain includes Ba, Zr, M, and O. M is a trivalent element. The concentration of M in the first crystal subdomain is different from the concentration of M in the second crystal subdomain.

Electrolyte membrane, membrane electrode assembly, electrochemical cell, and method for manufacturing electrolyte membrane

A membrane electrode assembly according to the present disclosure includes an electrolyte membrane containing a solid electrolyte and a first electrode bonded to the electrolyte membrane, wherein the solid electrolyte is a compound represented by the composition formula (1): BaZrMO, M in the composition formula (1) is at least one element selected from the group consisting of Sc, Er, Ho, Dy, Gd, Y, In, Tm, Yb, and Lu, and 0<x<1 and 0<γ<0.5 are satisfied, and the first electrode contains a lanthanum strontium cobalt iron palladium composite oxide.

Membrane electrode assembly, electrochemical device, and electrochemical system

The fuel cell system of the present disclosure includes: a fuel cell that includes a membrane electrode assembly including a proton conducting ceramic electrolyte membrane, a cathode disposed on a first surface of the electrolyte membrane, and an anode disposed on a second surface of the electrolyte membrane, the fuel cell generating electric power through an electrochemical reaction using a fuel gas and an oxidant gas; a power source that applies a voltage to the fuel cell; and a controller. In a shutdown process, the controller controls the power source to apply the voltage to the fuel cell such that a terminal voltage of the fuel cell is equal to or higher than an open circuit voltage of the fuel cell.

Fuel cell system and control method for fuel cell system

A fuel cell system according to the present disclosure includes: a solid oxide fuel cell that produces electricity from an electrochemical reaction by using a fuel and air and that includes a membrane electrode assembly including a proton-conductive electrolyte membrane, a cathode disposed on a first main surface of the electrolyte membrane, and an anode disposed on a second main surface of the electrolyte membrane; and a controller. In the operation stop process for stopping operation of the fuel cell system, the controller is configured to control supply of the fuel at a higher flow rate than the flow rate of the fuel consumed in the solid oxide fuel cell in an open circuit state.

Fuel cell system and method for controlling fuel cell system

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 solid oxide fuel cell including unit cells, including: a pair of interconnectors for electrically connecting the unit cells; a membrane-electrode assembly including an electrolyte membrane and a pair of electrode layers disposed with the electrolyte membrane therebetween; a pair of current collectors disposed between the electrode layers and the interconnectors so as to be in contact with the pair of electrode layers and the pair of interconnectors, respectively, and electrically connecting the pair of electrode layers and the pair of interconnectors; and elastic bodies biasing at least one current collector of the pair of current collectors toward a corresponding electrode layer and made of austenitic stainless steel.

Solid oxide fuel cell and electrochemical cell

The fuel cell of the present disclosure includes: a fuel single cell comprising a fuel electrode, an air electrode, and an electrolyte disposed between the electrodes; a separator for separating a fuel gas flowing through the fuel electrode and air flowing through the air electrode; and a sealing portion for hermetically bonding between the separator and the electrolyte, wherein the sealing portion is constituted of a glass composition containing at least two of metallic or metalloid elements contained in the electrolyte and at least two of metallic or metalloid elements contained in the separator; the electrolyte includes a proton conductor; and the proton conductor is represented by a compositional formula: BaZrMO, where 0.05&#x2264;x&#x2264;0.5; and M is at least one selected from the group consisting of Sc, In, Lu, Yb, Tm, Er, Y, Ho, Dy, and/or Gd.

Fuel cell

A cell including: a pair of interconnectors for electrically connecting unit cells; a membrane-electrode assembly disposed between the interconnectors; a pair of current collectors, each of which includes an abutting surface abutting against a corresponding one of the electrode layers and a first base material surface being in contact with a corresponding one of the interconnectors and electrically connecting the corresponding of the electrode layers and the corresponding one of the interconnectors; and elastic bodies biasing the abutting surface of at least one current collector toward a corresponding one of the electrode layers. The elastic bodies includes: a second base material surface being in contact with the first base material surface; and an elastic body protruding portion supporting the abutting surface and protruding from the second base material surface toward the corresponding one of the electrode layers to bias the abutting surface toward the corresponding one of the electrode layers.

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.

Fuel cell system and method for operating the same

A fuel cell system includes a fuel cell stack constituted by cells, each of the cells includes a fuel electrode, an air electrode, and an electrolyte, and generate electric power through a reaction of a fuel gas and air, a casing that houses the fuel cell stack, a temperature detector that detects a first temperature, the first temperature is a temperature of the fuel cell stack or inside the casing, and a controller. The controller controls based on the first temperature so as to allow an operation at a first predetermined temperature. The controller controls such that the first temperature reaches a temperature higher than or equal to a second predetermined temperature for a predetermined time. The second predetermined temperature is a temperature at which 475&#xb0; C. embrittlement that occurs on stainless steel is eliminated. The first predetermined temperature is lower than the second predetermined temperature.

Fuel cell system and method for operating the same, and electrochemical system and method for operating the same

The fuel cell of the present disclosure includes: a unit cell including: a fuel electrode, an air electrode and electrolyte disposed between the fuel electrode and the air electrodes; a separator for separating a fuel gas flowing though the fuel electrode and air flowing through the air electrode; and a sealing constituted of a glass composition for bonding the separator and the electrolyte, and at least a surface region of the sealing portion exposed to the fuel gas and the air does not contain Ba.

Fuel cell including glass seal with barium free surface regions

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 proton conductor is a proton conductor represented by a composition formula of BaZrYInO, and x and y in the composition formula satisfy 0&#x3c;y&#x2264;0.013 and 0&#x3c;x+y&#x3c;0.5. A small amount of In is added to the composition in a predetermined range, whereby a resistance of the crystal grain boundary of the proton conductor can be decreased so as to compensate for or even exceed the increase in resistance in the crystal gains of the proton conductor caused by the addition of In, and as a result, the entire resistance can be decreased.

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Osaka, Japan

Tomohiro Kuroha