Lg Chem, Ltd

Jae Hyuk Chang

Chong Kyu Shin

Bong Keun Lee

Young Ji Tae

Kwon Nam Sohn

Yong Su Park

Eun Ju Kim

Disclosed is an organic/inorganic composite electrolyte membrane comprising: (a) a sulfonated fluorine-free hydrocarbon-based polymer; and (b) inorganic particles capable of collecting moisture, wherein the inorganic particles include zeolite. Also, disclosed are an electrode comprising the zeolite as a component for forming a catalyst layer, a membrane electrode assembly comprising the electrolyte membrane and/or the electrode, and a fuel cell having the membrane electrode assembly. The organic/inorganic composite electrolyte membrane using the hydrophilic zeolite in combination with the sulfonated fluorine-free hydrocarbon-based polymer shows high proton conductivity, and thus can impart excellent quality to a fuel cell even under high-temperature and low-humidity conditions.

Organic/inorganic composite electrolyte membranes using zeolite and fuel cell comprising the same

Disclosed is a sulfonated multiblock copolymer, which comprises a hydrophilic block (X) having a repeating unit represented by the following formula 1a, and a hydrophobic block (Y) having a repeating unit represented by the following formula 2, wherein the number (m) of the repeating unit of formula 1a in the hydrophilic block (X) and the number (n) of the repeating unit of formula 2 in the hydrophobic block (Y) satisfy the conditions of 4&#x2266;m&#x2266;400 and 4&#x2267;n&#x2267;400. An electrolyte membrane obtained from the sulfonated multiblock copolymer and a fuel cell using the electrolyte membrane are also disclosed:Ar&#x2014;O&#x2014;Ar&#x2014;O&#x2003;&#x2003;[Formula 1a]Ar&#x2014;O&#x2014;Ar&#x2014;O&#x2003;&#x2003;[Formula 2]

Sulphonated multiblock copolymer and electrolyte membrane using the same

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Daejeon, South Korea

Jae Hyuk Chang