Sulfonated poly(ether sulfone) (SPES)/boron phosphate (BPO4) composite membranes for high-temperature proton-exchange membrane fuel cells

Wen, Sheng; Gong, Chunli; Tsen, Wen‐Chin; Shu, Yao-Chi; Tsai, Fang‐Chang

doi:10.1016/j.ijhydene.2009.08.074

Cited by 86 publications

(51 citation statements)

References 34 publications

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“…However, when the SiO 2 doping content exceeded a specific range, the proton conductivity dropped significantly due to the nonconductive of the hygroscopic oxides themselves. 10 The similar phenomenon was detected in sulfonated polyether sulfone (SPES)/SiO 2 composite membranes, as described in our previous work.…”

Section: Introductionsupporting

confidence: 84%

PWA/silica doped sulfonated poly(ether sulfone) composite membranes for direct methanol fuel cells

Chen

Tsi

Tsen

et al. 2011

J of Applied Polymer Sci

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A novel sulfonated poly(ether sulfone) (SPES)/phosphotungstic acid (PWA)/silica composite membranes for direct methanol fuel cells (DMFCs) application were prepared. The structure and performance of the obtained membranes were characterized by thermogravimetric analysis (TGA), differential scanning calorimetry (DSC), scanning electron microscopy (SEM), water uptake, proton conductivity, and methanol permeability. Compared to a pure SPES membrane, PWA and SiO 2 doped membranes had a higher thermal stability and glass transition temperature (T g ) as revealed by TGA-FTIR and DSC. The morphology of the composite membranes indicated that SiO 2 and PWA were uniformly distributed throughout the SPES matrix. Proper PWA and silica loadings in the composite membranes showed high proton conductivity and sufficient methanol permeability. The selectivity (the ratio of proton conductivity to methanol permeability) of the SPES-P-S 15% composite membrane was almost five times than that of Nafion 112 membrane. This excellent selectivity of SPES/PWA/silica composite membranes indicate a potential feasibility as a promising electrolyte for DMFC.

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Section: Introductionsupporting

confidence: 84%

PWA/silica doped sulfonated poly(ether sulfone) composite membranes for direct methanol fuel cells

Chen

Tsi

Tsen

et al. 2011

J of Applied Polymer Sci

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“…The polymer can contain a proton-donor group (so-called ionomers, the most used of which is Nafion) [13,27,29,30,37,62,69,[87][88][89][90][91][92][93][94][95][96][97][98][99][100][101][102][103], or it is introduced into the polymer by the appropriate reactions during the formation of the PEM [36,56,[104][105][106][107]. In addition the ionomer was synthesized from the corresponding monomers in the sol-gel process [106][107][108][109][110][111]; this is discussed in a separate section.…”

Section: Organic-inorganic Hybrid Proton-exchange Membranes Includingmentioning

confidence: 99%

“…First of all attention was turned to heat-resistant polyheteroarylenes -sulfonated polyetheretherketones (SPEEK) [13,98,101,113], sulfonated polyethersulfones (SPES) [13,37,93,98], sulfonated polyethers (SPE) [89], and sulfonated polyimides (SPI) [102]. In addition to them ionomers with an aliphatic main chainpolystyrene and its copolymers [100,103], polyvinyl alcohol (PVA) [36,62,99], polyacrylic acid [62], polyallylamine [56] have also been subjects for insertion.…”

Section: Organic-inorganic Hybrid Proton-exchange Membranes Based On mentioning

confidence: 99%

“…A series of SPES/BPO 4 hybrid membranes with BPO 4 contents of up to 40% were obtained by the sol-gel method using B(OC 3 H 7 ) 3 and H 3 PO 4 (sample 7, Table 3) [98]. If the BPO 4 content is increased the water absorption, glass transition temperature, thermal stability, and resistance to oxidation increase.…”

Section: Organic-inorganic Hybrid Proton-exchange Membranes Based On mentioning

confidence: 99%

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Polymeric organic–inorganic proton-exchange membranes for fuel cells produced by the sol–gel method

2011

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Approaches to the production of polymeric organic-inorganic hybrid proton-exchange membranes for fuel cells by the sol-gel method are summarized, and a classification is proposed for them. Features of the mechanism of conduction in the proton-conducting membranes are considered. Characteristics of the hybrid membranes and of fuel cells using them are presented. The main directions of research in this field are discussed.

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“…It has also been reported that rapid ionic transfer through the interface between the two different materials occurs in some proton-conducting organic/inorganic composite materials [12,15]. Higher stabilities, greater proton conductivity, or better fuel-cell performance have been reported for some composite systems such as Nafion/TiO 2 , SPEEK/WO 3 , SPES/ heteropoly acid (H 3 PW 12 O 40 ), SPES/boron phosphate (BPO 4 ), or SPEEK/ organically treated montmorillonite (OMMT) [12][13][14][16][17][18][19].…”

Section: Introductionmentioning

confidence: 99%

Effects of tin phosphate nanosheet addition on proton-conducting properties of sulfonated poly(ether sulfone) membranes

et al. 2012

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a b s t r a c t a r t i c l e i n f oThe stabilities and proton conductivities of SPES/SnP nanosheet (SnP-NS) composite membranes were investigated and compared with those of SPES/SnP particle (SnP-P) composite membranes. The chemical stabilities as evaluated by thermogravimetry, differential thermal analysis, and diffuse reflectance Fourier-transform infrared spectroscopy were improved in both composite membranes. The improvement in the structural stability of SPES/SnP-NS composite membranes was more evident than that in SPES/SnP-P. The results suggest that exfoliation of SnP increases the area of the SPES-SnP interface and extends the connectivity of the network of hydrogen bonds. A composite membrane containing 10 vol.% SnP-NS (SPES/SnP-NS10vol.%) showed a high conductivity of 5.9×10−2 S cmat 150°C under saturated water vapor pressure. Although less water was present in SPES/SnP-NS10vol.% than in SPES/SnP-P10vol.% or pure SPES, the conductivity of SnP-NS10vol.% was the highest among these samples at 130°C under a high relative humidity (RH). However at a low RH, the proton-conducting property was not improved by changing the composition of the SnP-NS. These results suggest that the hydrogen-bond network operates effectively for proton conduction at a high RH, but at a low RH, the network fails to conduct as a result of a decrease in water content accompanied by structural stabilization.

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Sulfonated poly(ether sulfone) (SPES)/boron phosphate (BPO4) composite membranes for high-temperature proton-exchange membrane fuel cells

Cited by 86 publications

References 34 publications

PWA/silica doped sulfonated poly(ether sulfone) composite membranes for direct methanol fuel cells

PWA/silica doped sulfonated poly(ether sulfone) composite membranes for direct methanol fuel cells

Polymeric organic–inorganic proton-exchange membranes for fuel cells produced by the sol–gel method

Effects of tin phosphate nanosheet addition on proton-conducting properties of sulfonated poly(ether sulfone) membranes

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