LG化学开发低铱用量PEM水电解电极技术

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LG Chem Develops PEM Water Electrolysis Electrode With Reduced Rare Metal
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Cuts iridium use by more than half, doubles durability
EunGyu Kim
Published 2026.07.27 07:22
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LG Chem researchers pose for a commemorative photo after developing PEM water electrolysis electrode technology for green hydrogen production. (Photo: LG Chem)
LG Chem has developed a proton exchange membrane (PEM) water electrolysis electrode technology that reduces the use of the rare metal iridium (Ir) by more than half while improving durability. It also verified large-area electrode production, raising the commercialization potential of this next-generation green hydrogen production material.
LG Chem said on July 26 that a research team at the Platform Technology Research Center under its CTO organization developed an interface stabilization technology that improves the performance and durability of PEM water electrolysis electrodes. The research results were published in the international journal Nature Communications on July 21.
Green hydrogen is hydrogen produced by splitting water with renewable energy power. PEM water electrolysis is regarded as a next-generation hydrogen production technology because of its high hydrogen productivity and responsiveness to power output. However, securing economic viability while using expensive rare-metal iridium catalysts in the electrode has been cited as a challenge for commercialization. Reducing iridium use caused the catalyst to dissolve and the electrode structure to weaken, degrading performance during long-term operation.
LG Chem solved this problem with an interface stabilization technology that applies an atomic-scale coating layer to the surface of the iridium catalyst. The coating layer prevents excessive oxidation of the catalyst to suppress iridium dissolution, and strengthens the stability of the electrode structure by raising the bonding strength with the ion-conducting polymer inside the electrode. Through this, it reduced iridium use by more than half compared with before, while more than doubling stable hydrogen production time under high current-density conditions.
LG Chem also completed large-area electrode production and performance verification using a continuous process. It confirmed the potential for mass production and commercialization beyond the laboratory level. It is currently conducting product evaluations with a number of global water electrolysis system makers.
"These research results are a case in which LG Chem's materials technology competitiveness has been recognized globally," said Shim Kyu-seok, executive vice president and CTO of LG Chem. "We will continue to expand related research and development to secure competitiveness in next-generation hydrogen production technology."
giddk1206@thelec.kr
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