Mitsubishi Denki Kabushiki Kaisha

Toshiaki Murahashi

Kenro Mitsuda

Hisashi Shiota

Hiroaki Urushibata

Hideo Maeda

Shiro Yamauchi

Kenzo Takahashi

Kozo Shimamoto

Takeo Yoshioka

Tatsuo Mitsunaga

Yoshiaki Sakamoto

Ikuyuki Hirata

An oxygen concentration controlling element where the shortest distance between the anode and cathode separated by a solid electrolyte film is set not larger than 50 .mu.m, thereby to accelerate the back-diffusion of water generated in the cathode to the anode and dispense with a tank or a pump for supplying water to the anode. An oxygen concentration or humidity controlling apparatus where a photoelectric element is disposed at an opening of a to-be-controlled space to the atmospheric air and the electric energy from the photoelectric element is accumulated in a secondary battery, thus realizing space-saving apparatus which can operate continuously though the power is turned off, and a humidity controlling apparatus functioning both as a humidifier and as a dehumidifier.

Oxygen concentration or humidity controlling apparatus

A molten carbonate fuel battery comprises a stack of molten carbonate fuel cells. A half-cell anode and a half-cell cathode are disposed at the positive and negative ends which are defined by the end cathode and end anode, respectively, of the stack, with respective separators disposed therebetween. The half-cell anode includes an anode electrode and an anode reaction gas flow path, but does not include a matrix, and the half-cell cathode includes a cathode electrode and a cathode reaction gas flow path, but does not include a matrix.

Molten carbonate fuel battery with electrolyte migration control

An electrochemical single battery such as fuel cells, and so forth, having an increased reaction area to augment its output density, which comprises a pair of electrode parts which are mutually opposed to be the electrodes when the electrochemical reaction is effected; reaction layers to carry out the electrochemical reaction, which are positioned between these two electrode parts, each being protruded alternately in one and the same direction from one electrode part toward the other electrode part in confrontation thereto, and being a slant with respect to said electrode parts; and an electrolyte layer interposed between these confronted reaction layers and holding therein an electrolyte which transmits ions to be produced at the time of the electrochemical reaction. A method for producing an electrochemical single battery, which comprises steps of: forming, on both surfaces of a planar electrolyte layer sheet, reaction layer sheets of a size smaller than the electrolyte layer sheet in lamination, followed by shaping the laminated sheets into the form of bellows; and pressing the laminated sheets in the form of bellows from a slant direction with respect to the sheet surface.

Electrochemical single battery and method for producing the same

A fuel cell having a receiver extending from a side surface of a stacked-cell body of a fuel cell and adapted to receive surplus electrolyte falling along the side surface, and a barrier disposed on the receiver and adapted to catch the electrolyte discharged from a reserve plate while partially restricting an opening which serves as the outlet of a reaction gas flow path. The electrolyte discharged from one single cell can positively be recovered and returned to the same single cell without causing any substantial pressure loss.

Stacked type fuel cell

The invention relates to an improvement of the gas sealing at the periphery of the electrode base and separator which constitute the fuel cell. Provided herein is a method for sealing the gas of a phosphoric acid-type fuel cell which comprises filling the pores in the porous material periphery of the cell constituents with fine particles of at least one of silicon carbide and silicon nitride which have undergone surface oxidation treatment, and causing particles to expand in volume through the reaction of the surface oxide of the particles with hot phosphoric acid that yields phosphate compounds, thereby clogging the pores.

Growing community of inventors

Amagasaki, Japan

Toshiaki Murahashi