Polyepichlorhydrin membranes for alkaline fuel cells: sorption and conduction properties.
Polymer electrolytes, using a poly(epichlorhydrin-allyl glycidyl ether) copolymer as matrix, are shown to perform well in alkaline fuel cell electrolyte. An anion-conducting network is obtained by the incorporation of cyclic diamines, 1,4-diazabicyclo[2.2.2]octane (DABCO) and 1-azabicyclo[2.2.2]octane (quinuclidine). The physicochemical and electrochemical characteristics are evaluated. The best conductivity of 1.3.10 (-2) S/cm is obtained at 60 degrees C and a relative humidity of RH = 98%. Ionic conductivity is particularly sensitive to relative humidity. To gain insight into the OH (-) conduction mechanism and the role of water, sorption measurements versus water activity, differential scanning calorimetry, and NMR measurements are carried out.
Stoica
Daniela
D
Laboratoire d'Electrochimie et de Physico-chimie des Materiaux et des Interfaces (LEPMI), 1130 Rue de la Piscine, Saint Martin d'Heres, France.
Alloin
Fannie
F
Marais
Stephane
S
Langevin
Dominique
D
Chappey
Corinne
C
Judeinstein
Patrick
P