Hyundai Motor Company

Kia Motors Corporation

Kia Corporation

Korea Advanced Institute of Science and Technology

Hoon Hui Lee

Jin Seong Choi

Dong Hwan Yoon

Hee Tak Kim

Jin Yi Choi

Gi Su Doo

Seong Min Yuk

The present invention provides a method for manufacturing a catalyst for a fuel cell which may not be poisoned by an ionomer. Specifically, the method includes: loading a catalyst on a support, coating a carbon layer having a predetermined thickness on the surface of the support, and exposing the catalyst to the outside by removing at least a part of the carbon layer.

Method for manufacturing catalyst for fuel cell not poisoned by ionomer

A cathode for fuel cells includes a carbon support, a platinum catalyst supported on the carbon support and an ionomer surrounding the carbon support and the platinum catalyst, wherein the ionomer is removed from the surface of the platinum catalyst. The cathode for fuel cells has a structure in which an ionomer film coating the surface of the platinum catalyst and thus acting as oxygen transfer resistance is removed from the surface of the platinum catalyst and, thus, mass transfer resistance (oxygen diffusion resistance) may be reduced and performance of a fuel cell may be improved. Further, the cathode having a low amount of platinum used due to improvement in platinum utilization may effectively execute oxygen transfer and thus increase the amount of platinum participating in catalysis, as compared to conventional cathodes.

Cathode for fuel cells and method of manufacturing membrane electrode assembly having the same

An operation control method and system of a fuel cell (stack) are provided and extend the operation field of the fuel cell in a fuel cell electric vehicle and ensure power performance in the initial stage of starting of the vehicle. In an operation control method of a fuel cell having improved reverse voltage durability, in which an oxygen evolution catalyst is added to the anode electrode, a cell voltage of the fuel cell during normal operation of the fuel cell is monitored. The monitored cell voltage of the fuel cell is compared with a first setting voltage. When the cell voltage is less than the first setting voltage as the cell voltage decreases, a fuel cell operation control process for increasing the humidity in a cell of the fuel cell is performed.

Operation control method and system of fuel cell

A method of manufacturing a cathode with improved mass transfer capability includes (a) mixing a metal-supported catalyst with an alkane compound having a thiol group and masking a surface of the metal-supported catalyst with the alkane compound having the thiol group by coating; (b) mixing the metal-supported catalyst masked with the alkane compound having the thiol group, with a polymer electrolyte and a solvent to produce a slurry and manufacturing the cathode using the slurry; and (c) producing a membrane electrode assembly (MEA) using the cathode, an electrolyte membrane and an anode and applying a voltage to the membrane electrode assembly to remove the alkane compound having the thiol group.

Method for manufacturing cathode with improved mass transfer capability and cathode manufactured by the method

The present invention provides a hydrocarbon composite electrolyte membrane for a fuel cell, which is formed of an inexpensive hydrocarbon electrolyte membrane to ensure mechanical and thermochemical stability. The present invention provides a hydrocarbon composite electrolyte membrane for a fuel cell, the hydrocarbon composite electrolyte membrane including at least one composite electrolyte membrane layer having a structure in which graphene nanostructures are impregnated into a hydrocarbon electrolyte membrane.

Growing community of inventors

Seoul, South Korea

Hoon Hui Lee