Lg Chem, Ltd

Jin Nam Park

Hyuk Joo Kim

Min Suk Kim

Byungwoo Park

Chunjoong Kim

Myunggoo Kang

Sung Eun Kim

Sang Woo Lee

Seong Min Song

Byungwoo Sch Of Materials Science And Eng Park

Chunjoong Sch Of Materials Science And Eng Kim

Myunggoo Sch Of Materials Science And Eng Kang

Disclosed is an electrode catalyst comprising: (a) a support with a specific surface area of at least 1200 m/g; and (b) platinum or platinum-containing alloy particles on the support, wherein the platinum is supported on the electrode catalyst in an amount of 56&#x2dc;90 wt % based on the total weight of the electrode catalyst. A membrane electrode assembly (MEA) comprising the electrode catalyst and a fuel cell using the MEA are also disclosed. The electrode catalyst comprises platinum or platinum-containing alloy particles highly dispersed on a support with a large surface area in an amount of 56 wt % or more, and thus has an extended catalytically active region, resulting in improvement in the quality of a fuel cell.

Membrane electrode assembly, fuel cell comprising the membrane electrode assembly, and method for preparing an electrode catalyst

Disclosed is a method for preventing metal catalyst particles supported on a support and formed of a catalytically active metal or metal-containing alloy from coarsening, the method comprising: dispersing an anti-coarsening compound having a coarsening temperature higher than that of the metal catalyst, in at least one region selected from the group consisting of interstitial spaces among the metal catalyst particles and contact sites between the support and the metal catalyst particles. The electrode catalyst is structurally stable while not causing degradation of electrochemical quality, and thus can improve the longevity properties of a fuel cell.

Electrode catalyst with improved longevity properties and fuel cell using the same

Disclosed is an electrode catalyst comprising: (a) a support; (b) metal catalyst particles supported on the support and formed of a catalytically active metal or metal-containing alloy; and (c) an anti-coarsening compound, which is dispersed in at least one region selected from the group consisting of interstitial spaces among the catalyst particles and contact sites between the support and the catalyst particles, and has a coarsening temperature higher than that of the catalyst. A method for preparing the electrode catalyst is also disclosed.

Disclosed are a method for manufacturing a catalyst-coated membrane, the catalyst-coated membrane manufactured by the method, and a fuel cell including the catalyst-coated membrane manufactured by the method. The method includes the steps of: (a) providing a mask including a masking film layer and a first adhesive layer laminated on the masking film layer, and having patterns in which portions corresponding to the portions of an electrolyte membrane to be coated with catalyst are removed; (b) attaching the mask on one surface or both surfaces of the electrolyte membrane; (c) coating catalyst ink on the electrolyte membrane through the patterns of the mask so as to form a catalyst layer; and (d) removing the masking film layer and the first adhesive layer.

Method for manufacturing catalyst-coated membrane using mask

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Seoul, South Korea

Jin Nam Park