Hyundai Motor Company

Kia Motors Corporation

Kia Corporation

Daegu Gyeongbuk Institute of Science and Technology

Yonsei University

Sungkyunkwan University

Ju Ahn Park

Jun Tae Kim

Sangaraju Shanmugam

Sung Ho Park

Woong Hee Lee

Won Jung Kim

Ju Young Lee

Yong Min Kim

Han Sung Kim

Min Kyung Kim

Ju Hee Lee

Byoung Su Kim

You Jung Song

Ha Yeong Yu

Jung Ik Kim

Jin Yi Choi

Disclosed are porous multi-metal oxide nanotubes and a production method therefor. In one aspect, methods for producing porous multi-metal oxide nanotubes are provided comprising: (a) preparing an admixture comprising metal-acetylacetonate precursors, polyacrylonitrile (PAN) and a solvent component; and (b) producing a nanocomposite from the admixture, wherein metals of the metal-acetylacetonate precursors comprise a non-radioactive alkali metal stable isotope and a non-radioactive alkaline earth metal stable isotope. As such, porous multi-metal oxide nanotubes having a single-phase multivalence may be obtained in high yield without using harmful chemical substances. In addition, the polymer electrolyte membrane including the porous multi-metal oxide nanotubes may have maintained and improved mechanical strength, and thus may have maintained durability even during cell operation and may also have improved proton conductivity even at low humidity. The fuel cell including the polymer electrolyte membrane may have improved performance.

Porous multi-metal oxide nanotubes and production method therefor

An apparatus and method for manufacturing a membrane-electrode assembly enable decal transfer to be effectively performed by lowering a glass transition temperatures of ion-conductive polymers included in an electrolyte membrane material and electrodes by spraying a sprayable material onto at least one of the electrolyte membrane material or each of the electrodes.

Apparatus and method for manufacturing membrane-electrode assembly

Disclosed are an electrolyte membrane of a membrane-electrode assembly including an electronic insulation layer, which greatly improves the durability of the electrolyte membrane, and a method of preparing the same. The electrolyte membrane includes an ion exchange layer and an electronic insulation layer provided on the ion exchange layer, and the electronic insulation layer includes one or more catalyst complexes, and a second ionomer Particularly, each of the one or more catalyst complex includes a catalyst particle and a first ionomer coated on the entirety or a portion of the surface of the catalyst particle, and the one or more catalyst complexes are dispersed the second ionomer.

Electrolyte membrane of membrane-electrode assembly including electronic insulation layer and preparation method thereof

A method of preparing a catalyst for a fuel cell includes no carbon support. The method of preparing a catalyst for a fuel cell includes preparing a first metal nanoparticle having a polyhedral shape, growing a second metal along the edge of the first metal nanoparticle, and removing the first metal nanoparticle.

Method of preparing a catalyst for a fuel cell without a carbon support

A method for preparing a multi-component alloy catalyst on which a catalytic metal is supported includes preparing a carbon composite having a carbon support coated with a cationic polymer, supporting a catalytic metal containing at least two metal elements on the carbon composite to prepare an alloy catalyst precursor, and washing the alloy catalyst precursor to remove the cationic polymer.

Method of preparing a multi-component alloy catalyst

A method of producing a catalyst including a platinum-transition metal alloy on carbon, more specifically, a method of producing a carbon supported platinum alloy catalyst with high activity and superior durability includes coating a carbon-supported catalyst with an organic polymer as a material for a carbon layer, heat-treating the catalyst under a hydrogen-deficient atmosphere to convert the organic polymer into the carbon layer to prevent growth of catalyst particles caused by heat treatment through the carbon layer, allowing, at the same time, a transition metal supported together with platinum to be diffused into platinum particles to form a catalyst having a core-shell structure including a platinum skin layer on a surface thereof, and removing the carbon layer by ozone treatment after the heat treatment to induce an electrochemical reaction on the surface of the catalyst.

Method of producing Pt alloy catalyst using protective coating of carbon layer and ozone

Growing community of inventors

Yongin-si, South Korea

Ju Ahn Park