Major Accomplishments of KIST Over Its 40-Year History. Since its foundation over 40 years ago, KIST has remained faithful to its role as a comprehensive research institute supporting Korea's interests and has made active contributions to the growth of the nation's industrial base through advancements in science and technology. A review of its major accomplishments through the years offer a peek into the most significant events in its history.

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Project Name Hydrocarbon-based polymer electrolyte membrane for proton exchange membrane fuel cells
Year 2011 Director Dr. Hyoung-Juhn Kim
1. Content & Characteristic
O To replace DuPont's Nafion membrane, low cost hydrocarbon-based polymer electrolyte has been synthesized. The technology was transferred to Donjin Semichem for large volume production.
- IPN(inter-penetrating polymer network) type membrane was fabricated with sulfonated poly(ether sulfone) to improve the long-term durability of the electrolyte membrane.
- The IPN sufonated poly(ether sulfone) membrane was utilized for the fabrication of membrane electrolyte assembly. (performance: 0.9A/cm2@0.6V; over 2,000 h duty cycle operation)

(a) Roll type hydrocarbon-based polymer electrolyte membrane (co-work with Dongjin semichem) (b) membrane electrode assembly with hydrocarbon-based polymer electrolyte membrane
2. Scientific Value
O Even though there are several efforts for preparation of low cost electrolyte membrane, the hydrocarbon-based electrolytes have not been commercialized yet due to their low durability. In this studies, novel synthetic methods were developed to improve long-term stability dramatically.
3. Economic Effect
O Novel polymer electrolyte membrane has excellent durability to replace Nafion type membranes. Also, the membrane can be produced at 1/10 of Nafion price, which could lead the commercialization of proton exchange membrane fuel cells.
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