Composite proton exchange membranes based on inorganic proton conductor boron phosphate functionalized multi-walled carbon nanotubes and chitosan

Wang, Jie; Qu, Ting; Ni, Jing; Cheng, Fan; Hu, Fuqiang; Ou, Ying; Gong, Chunli; Wen, Sheng; Chen, Xiaobo; Liu, Hai

doi:10.1016/j.surfin.2022.102557

Cited by 9 publications

(7 citation statements)

References 39 publications

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“…The element mapping image (Figure 7B) shows the P distribution between SiO 2 grains. By detecting the presence of P, it is shown that BPO 4 forms a glass phase connecting SiO 2 grains 24 …”

Section: Resultsmentioning

confidence: 99%

“…By detecting the presence of P, it is shown that BPO 4 forms a glass phase connecting SiO 2 grains. 24 The SEM images of samples with 5 wt.% BPO 4 sintered at different temperatures are shown in Figure 8. Figure 8A shows that the sample is not sintered after sintering at 1200 • C, with a large number of micropores distributed in the matrix.…”

Section: F I G U R Ementioning

confidence: 99%

“…Among the many additives, BPO 4 has excellent thermal stability and oxidation resistance, environmental protection, and flame retardant properties, and has been used as catalysts, flame retardants, 16 and fuel cells. 17 However, to date, the research on BPO 4 inhibiting the phase transition of quartz has not been reported. Therefore, it is of great significance to study the inhibitory behavior of BPO 4 on quartz phase transition.…”

Section: Introductionmentioning

confidence: 99%

“…Therefore, it is necessary to introduce an additive to overcome the above phenomenon, which is conducive to expanding the practical application range of the material. Among the many additives, BPO 4 has excellent thermal stability and oxidation resistance, environmental protection, and flame retardant properties, and has been used as catalysts, 15 flame retardants, 16 and fuel cells 17 . However, to date, the research on BPO 4 inhibiting the phase transition of quartz has not been reported.…”

Section: Introductionmentioning

confidence: 99%

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Effect of BPO₄ on phase transition behavior and sintering of quartz materials

Li,

et al. 2023

Int J Applied Ceramic Tech

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In order to inhibit the phase transition of quartz, the effects of BPO4 addition and sintering temperature on the structure and properties of quartz materials were studied. The results showed that the addition of 5 wt.% BPO4 successfully inhibited the formation of cristobalite. Samples with 5 wt.% BPO4 added exhibited the high cold modulus of rupture (15.59 MPa) and bulk density (1.92 g/cm3) sintered at 1200°C–1400°C. In addition, BPO4 formed a glass phase sintered at 1200°C–1400°C and distributed between SiO2 particles, filling pores and densifying the material. Therefore, the prepared quartz‐based ceramics with BPO4 have broad potential in the field of medium and high temperatures, and can be applied to aerospace and other fields.

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“…The element mapping image (Figure 7B) shows the P distribution between SiO 2 grains. By detecting the presence of P, it is shown that BPO 4 forms a glass phase connecting SiO 2 grains 24 …”

Section: Resultsmentioning

confidence: 99%

Section: F I G U R Ementioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Effect of BPO₄ on phase transition behavior and sintering of quartz materials

Li,

et al. 2023

Int J Applied Ceramic Tech

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“…In a research work carried out by Wang, Jie et al, multi-walled carbon nanotubes (MWNTs) were functionalized with super inorganic proton conductor boron phosphate (BPO 4 ) using a sol-gel process aided by polydopamine (PDA), producing BPO 4 -coated MWNTs (BPO 4 @MWNTs) [ 73 ]. The BPO 4 @MWNTs were then mixed with a weak chitosan (CTS) solution to form a composite membrane made of CTS and BPO 4 @MWNTs.…”

Section: Nanomaterials Doped Pemmentioning

confidence: 99%

Recent Advanced Synthesis Strategies for the Nanomaterial-Modified Proton Exchange Membrane in Fuel Cells

et al. 2023

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Hydrogen energy is converted to electricity through fuel cells, aided by nanostructured materials. Fuel cell technology is a promising method for utilizing energy sources, ensuring sustainability, and protecting the environment. However, it still faces drawbacks such as high cost, operability, and durability issues. Nanomaterials can address these drawbacks by enhancing catalysts, electrodes, and fuel cell membranes, which play a crucial role in separating hydrogen into protons and electrons. Proton exchange membrane fuel cells (PEMFCs) have gained significant attention in scientific research. The primary objectives are to reduce greenhouse gas emissions, particularly in the automotive industry, and develop cost-effective methods and materials to enhance PEMFC efficiency. We provide a typical yet inclusive review of various types of proton-conducting membranes. In this review article, special focus is given to the distinctive nature of nanomaterial-filled proton-conducting membranes and their essential characteristics, including their structural, dielectric, proton transport, and thermal properties. We provide an overview of the various reported nanomaterials, such as metal oxide, carbon, and polymeric nanomaterials. Additionally, the synthesis methods in situ polymerization, solution casting, electrospinning, and layer-by-layer assembly for proton-conducting membrane preparation were analyzed. In conclusion, the way to implement the desired energy conversion application, such as a fuel cell, using a nanostructured proton-conducting membrane has been demonstrated.

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Preparation and Characterization of SPEEK–PVA Blend Membrane Additives with Colloidal Silica for Proton Exchange Membrane Fuel Cell

Yagizatli,

Ulas,

Sahin

et al. 2024

J Polym Environ

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An inexpensive membrane with high proton conductivity and high fuel cell performance, which can be an alternative to Nafion for PEMFC (Proton exchange membrane fuel cell), will overcome the obstacle to widespread commercialization of fuel cells due to high cost. For this purpose, SPEEK (sulfonated polyether ether ketone)-PVA (polyvinyl alcohol) blend membranes with colloidal silica additives were synthesized in this study. Ludox AS-40 was used as the colloidal silica source and the blend membrane was prepared by solution casting method. Water uptake capacity, swelling property, size change, dynamic mechanical analysis, ion exchange capacity, AC impedance analysis, hydrolytic and oxidative stability experiments of the synthesized Ludox additives blend membranes for fuel cell application were carried out, and the membranes were also characterized by FTIR (Fourier transform infrared) analysis. While the water uptake capacities of SPEEK/PVA membranes containing 1% Ludox, 5% Ludox, and 10% Ludox at room temperature were found to be 14.08%, 14.84%, and 16.6%, respectively, the water uptake capacities at 80oC increased to 14.73%, 15.17%, and 17.11%. The proton conductivities of 1% Ludox, 5% Ludox and 10% Ludox doped SPEEK/PVA membranes at 80oC were 0.25 S/cm, 0.56 S/cm, and 0.65 S/cm, respectively. Similarly, ion exchange capacities were determined to be 1.41 meq/g, 1.63 meq/g, and 1.71 meq/g, respectively. All Ludox-added membranes exhibited excellent hydrolytic stability, retaining approximately 88% of their mass after 650 h. In addition, in oxidative stability experiments carried out in 4 ppm Fe+ 2 at 80oC, the 10% Ludox-added membrane exhibited the highest weight loss of 88.8% at the end of 24 h, while the 5% Ludox-additive membrane retained 91.6% of its total weight. Considering the proton conductivity and longevity tests of the synthesized membranes, they are thought to be promising structures. Graphical Abstract

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Composite proton exchange membranes based on inorganic proton conductor boron phosphate functionalized multi-walled carbon nanotubes and chitosan

Cited by 9 publications

References 39 publications

Effect of BPO₄ on phase transition behavior and sintering of quartz materials

Effect of BPO₄ on phase transition behavior and sintering of quartz materials

Recent Advanced Synthesis Strategies for the Nanomaterial-Modified Proton Exchange Membrane in Fuel Cells

Preparation and Characterization of SPEEK–PVA Blend Membrane Additives with Colloidal Silica for Proton Exchange Membrane Fuel Cell

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Composite proton exchange membranes based on inorganic proton conductor boron phosphate functionalized multi-walled carbon nanotubes and chitosan

Cited by 9 publications

References 39 publications

Effect of BPO4 on phase transition behavior and sintering of quartz materials

Effect of BPO4 on phase transition behavior and sintering of quartz materials

Recent Advanced Synthesis Strategies for the Nanomaterial-Modified Proton Exchange Membrane in Fuel Cells

Preparation and Characterization of SPEEK–PVA Blend Membrane Additives with Colloidal Silica for Proton Exchange Membrane Fuel Cell

Contact Info

Product

Resources

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Effect of BPO₄ on phase transition behavior and sintering of quartz materials

Effect of BPO₄ on phase transition behavior and sintering of quartz materials