Advanced Materials

Poly(alkylene biguanides) as Proton Conductors for High-Temperature PEMFCs

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Abstract

Poly(alkylene biguanides) are novel high-temperature proton conductors. This long-known class of polymers is presented as surprisingly stable high-temperature proton-conducting materials in the form of water-free HCl conjugates. Proton conductivity is dominated by free volume relaxation. Application in the context of fuel-cell membranes is discussed.

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