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High-Performance Solid Acid Fuel Cells Through Humidity Stabilization

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Science  02 Jan 2004:
Vol. 303, Issue 5654, pp. 68-70
DOI: 10.1126/science.1090920

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Abstract

Although they hold the promise of clean energy, state-of-the-art fuel cells based on polymer electrolyte membrane fuel cells are inoperable above 100°C, require cumbersome humidification systems, and suffer from fuel permeation. These difficulties all arise from the hydrated nature of the electrolyte. In contrast, “solid acids” exhibit anhydrous proton transport and high-temperature stability. We demonstrate continuous, stable power generation for both H2/O2 and direct methanol fuel cells operated at ∼250°C using a humidity-stabilized solid acid CsH2PO4 electrolyte.

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