Researchers have developed a polymer fuel cell that can function with and without water between 80°-200°C. Yoong-Kee Choe at the National Institute of Advanced Industrial Science and Technology in Japan and Cy Fujimoto of Sandia National Laboratories along with a team from the Los Alamos National Laboratory used a phosphate-quaternary ammonium ion-pair which had a stronger interaction, allowing not only for functioning at the higher range of temperature, but also a stronger than traditional acid-base interactions.

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