Japan Aerospace Exploration Agency

Nagaoka University of Technology

Minoru Umeda

Toru Kinoshita

Yoshitsugu Sone

Masato Sakurai

Tetsuya Nakabeppu

Asuka Shima

Isamu Uchida

Ryota Shinozaki

Akifumi Yamada

There are provided: a solid polymer power generation or electrolysis method that does not require injection of energy from the outside and maintenance of a high temperature, and is capable of converting carbon dioxide to a useful hydrocarbon while producing energy, controlling the production amounts of the hydrocarbons or the like and a ratio sorted by kind of the hydrocarbons, improving utilization efficiency of a product, and simplifying equipment for separation and recovery; and a system for implementing the solid polymer power generation or electrolysis method. Carbon dioxide is supplied to the side of one electrodeof a reactorhaving a membrane electrode assembly, hydrogen is supplied to the side of the other electrode, and the amounts of the hydrocarbons produced per unit time and the ratio sorted by kind of the hydrocarbons are changed by controlling a power generation voltage of the reactor

Solid polymer power generation or electrolysis method and system

A membrane-electrode assembly (MEA)has a solid polymer electrolyte membrane. The membranehas ion-conductive domainsand non-ion-conductive domainsand an electrode catalyst. The electrode catalystis present selectively on surface sites of the solid polymer electrolyte membranewhich corresponds to the ion-conductive domainsrather than surface sites of the membranewhich corresponds to the non-ion-conductive domains. A spray liquid containing the electrode catalyst and a solvent is applied onto a surface of the membraneby electrostatic spray deposition to selectively adhere the electrode catalyston the surface sites of the membranewhich corresponds to the ion-conductive domains. The membraneis preferably subjected to a hydrophilization treatment before being sprayed with the spray liquid.

Membrane electrode assembly, method for producing the same, and solid state polymer fuel cell

Growing community of inventors

Nagaoka, Japan

Minoru Umeda