New fully polymeric proton solvents with high proton mobility

Herz, Hans‐Georg; Kreuer, Klaus‐Dieter; Maier, Joachim; Scharfenberger, Gunter; Schuster, Michael; Meyer, Wolfgang

doi:10.1016/s0013-4686(03)00200-7

Cited by 183 publications

(150 citation statements)

References 8 publications

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“…Proton conductivity values of the membranes were obtained from the impedance data, which were collected with a computer interfaced HP 4192 A LF Impedance Analyzer in the frequency range of 5 Hz to 13 MHz with an applied voltage of 10 mV. The impedance measurement was carried out using a home-made two-electrode setup and stainless steel was used as the blocking electrodes.…”

Section: Ft-ir and Proton Conductivity Measurementmentioning

confidence: 99%

“…Some nitrogen containing heterocycles (e.g. imidazole) attached to small, fixed chains have also been studied, but no fuel cell data are available [3,[12][13][14][15]. In addition, efforts have been made to tether heterocycles like imidazole, 1H-1,2,3-triazole, and benzimidazole to alkyl polymer chains [16][17][18][19][20], but they are not ideal for high temperature PEMFC due to the low proton conductivity and poor stabilities of the alkyl backbones.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Blend membranes based on sulfonated poly(ether ether ketone) and polysulfone bearing benzimidazole side groups for proton exchange membrane fuel cells

Manthiram

Guiver

2006

Electrochemistry Communications

114

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Section: Ft-ir and Proton Conductivity Measurementmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Blend membranes based on sulfonated poly(ether ether ketone) and polysulfone bearing benzimidazole side groups for proton exchange membrane fuel cells

Manthiram

Guiver

2006

Electrochemistry Communications

114

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“…[33][34][35] Proton mobility in the electrolyte most likely depends on the distance between the hopping sites in the polymer material, [33][34][35] and usually, it is related to the activation energy of proton transfer under anhydrous condition. Several new polymers have been reported as possible electrolytes: polybenzimidazole(PBI)-acidic molecules, [49][50][51] imidazole group immobilized polymer-acidic molecules, [52][53][54][55][56] ionic liquid, [57][58][59][60] and inorganic-organic copolymers. 61 These electrolyte materials have high proton conductivity even under anhydrous and intermediate temperature conditions; however, some require the presence of liquid moieties, such as phosphoric or sulfuric acid solutions or an ionic liquid, to make proton conductivity high enough for the practical applications.…”

Section: Acid-base Composite Materialsmentioning

confidence: 99%

Bio-Inspired Membranes for Advanced Polymer Electrolyte Fuel Cells. Anhydrous Proton-Conducting Membrane via Molecular Self-Assembly

Honma¹,

Yamada²

2007

Bulletin of the Chemical Society of Japan

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Bio-inspired materials or natural biopolymers have attracted much attention for industrial applications as biocompatible materials. Although these materials have been discarded as industrial waste around the world, there is an increasing interest in environmental, engineering, and electrical applications of the biomaterials because of their well-controlled structures and superior conducting properties. The controlled structures of the hydrogen-bonding network in biomolecules, such as bioenergetic proteins, are essential for efficient energy transduction in living systems and application of a biomolecular mechanism could make it possible to prepare efficient electrolytes with superior conducting properties. We report here a recent investigation on the new class and new concept of electrolyte materials with bio-inspired molecular architectures of acid-base pairs for anhydrous proton conduction and its application in intermediate temperature C) polymer electrolyte fuel cells (PEFC). Although some membranes were composed from entirely biomolecular materials, they showed large anhydrous proton conductivities from room temperature to 160 C, and fuel cells employing biomembranes as a polymer electrolyte produced electrical power under non-humidified H 2 /O 2 condition at 160 C. These bio-inspired materials may have many potential applications not only because of its superior ion conducting properties, in particular, under anhydrous (water-free) or extremely low-humidity conditions, but also because of its biocompatibility.Increasing interest toward the global sustainable energy has occurred in relation to political, economical, and environmental protection aspects, whereas, from an industrial development point of view, advanced energy technology is becoming intensively important recently in ordered to reduce fossil fuel consumption and keep the environment clean for human activities. The Kyoto protocol has stimulated research activities in renewable energy technology in every nation and every industrial sector. Among them, polymer electrolyte fuel cells (PEFC) have been recognized as most promising energy conversion devices because they are much very efficient and emit less of CO 2 from automobile, terrestrial, and industrial power sources.

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“…There has been an intense search for alternative amphoteric hydrogen-bonded compounds capable of rendering high proton conductivity. Phosphoric acid, pyrazole, imidazole and benzimidazole have been studied [143,149,[160][161][162]. Phosphoric acid is relatively highly conducting [163].…”

Section: Self-assembled Protonically Conducting Polymersmentioning

confidence: 99%

“…The acid-base complexes have aroused interest even in the anhydrous case [176]. Another concept has been based on imidazoles and it has also been immobilized using polysiloxane backbones to which imidazoles are connected using flexible oligoethylene spacers [161]. To enhance transport, one may favor systems with low proton density and a large number of binding sites [131].…”

Section: Self-assembled Protonically Conducting Polymersmentioning

confidence: 99%