Sandwich-structure PI/SPEEK/PI proton exchange membrane developed for achieving the high durability on excellent proton conductivity and stability

Wei, Peng; Sui, Yang; Li, Xi; Liu, Qingkun; Zhu, Bensheng; Cong, Chuanbo; Meng, Xiaoyu; Zhou, Qiong

doi:10.1016/j.memsci.2021.120116

Cited by 33 publications

(14 citation statements)

References 55 publications

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“…These large clusters confirmed the decline of proton conductivity of [IM2][H 2 PO 4 ]/SPEEK membrane above 100°C in Figure 5a. It is speculated that when the dispersion is poor (possibly due to insufficient energy or excessive second phase), the solvent evaporation process may cause the aggregation between similar phases 46 . For the studied system, DMF can act as a very good solvent.…”

Section: Resultsmentioning

confidence: 98%

Study of high‐temperature proton exchange membrane through one‐step encapsulation of ionic liquid in sulfonated poly(ether ether ketone)

Sun

et al. 2022

J of Applied Polymer Sci

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The proton exchange membrane (PEM) is the core component of a high‐performance proton exchange membrane fuel cell (PEMFC). Since the traditional PEM has the disadvantages of poor cell performance and high cost, a new kind of PEM with good proton conductivity, low cost and simple preparation should be explored. In this paper, several different binary hybrid membranes were successfully prepared through one‐step encapsulation of different ionic liquids (ILs) in sulfonated poly(ether ether ketone) (SPEEK). The prepared membranes were characterized by scanning electron microscope (SEM), thermogravimetric analysis (TG), Fourier transform infrared spectroscopy (FT‐IR), X‐ray photoelectron spectroscopy (XPS), proton conductivity measurements and dynamic mechanical analysis (DMA). SEM images showed that ILs were fully doped into SPEEK. FT‐IR and XPS proved that SPEEK and IL formed a new chemical bond combined with intermolecular hydrogen bonds. The TG results showed that the binary hybrid membranes could maintain stability even at 300°C. The water uptake and swelling ratio showed that the water absorption capacity of the binary composite membrane played a vital role in improving proton conductivity. The proton conductivity study showed that ILs doping also helped to improve the proton conductivity of the SPEEK membrane. When the doping amount of IL was maintained at 30 wt.%, it has the highest proton conductivity, 25 mS cm−1 at 120°C. It was proved that anhydrous hybrid membrane tetraphenyl imidazole sulfate/SPEEK ([IM2][H2PO4]/SPEEK) could be used in PEMFC at medium temperature.

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Section: Resultsmentioning

confidence: 98%

Study of high‐temperature proton exchange membrane through one‐step encapsulation of ionic liquid in sulfonated poly(ether ether ketone)

Sun

et al. 2022

J of Applied Polymer Sci

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“…The chemical stability test was investigated by soaking the dried blended membranes into the Fenton’s reagent (3 w% H 2 O 2 ; 3 mg/L Fe 2+ ) at 60 °C for different time intervals. Then, they were washed, dried and change in weight ratio was determined [ 48 , 49 ].…”

Section: Methodsmentioning

confidence: 99%

SPEEK and SPPO Blended Membranes for Proton Exchange Membrane Fuel Cells

Khan

Shanableh

Shahida³

et al. 2022

Membranes

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In fuel cell applications, the proton exchange membrane (PEM) is the major component where the balance among dimensional stability, proton conductivity, and durability is a long-term trail. In this research, a series of blended SPEEK/SPPO membranes were designed by varying the amounts of sulfonated poly(ether ether ketone) (SPEEK) into sulfonated poly(phenylene) oxide (SPPO) for fuel cell application. Fourier transform infrared spectroscopy (FTIR) was used to confirm the successful synthesis of the blended membranes. Morphological features of the fabricated membranes were characterized by using scanning electron microscopy (SEM). Results showed that these membranes exhibited homogeneous structures. The fabricated blended membranes SPEEK/SPPO showed ion exchange capacity (IEC) of 1.23 to 2.0 mmol/g, water uptake (WR) of 22.92 to 64.57% and membrane swelling (MS) of 7.53 to 25.49%. The proton conductivity of these blended membranes was measured at different temperature. The proton conductivity and chemical stability of the prepared membranes were compared with commercial membrane Nafion 117 (Sigma-Aldrich, St. Louis, Missouri, United States) under same experimental conditions. The proton conductivity of the fabricated membranes increased by enhancing the amount of SPPO into the membrane matrix. Moreover, the proton conductivity of the fabricated membranes was investigated as a function of temperature. Results demonstrated that these membranes are good for applications in proton exchange membrane fuel cell (PEMFC).

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“…The DS was obtained by the integration ratio of the peak at 8.73 over the peaks at 7.1−8.2 ppm, which are the other protons of the aromatic ring. In addition, 13 C and 15 N NMR spectra of both MSOPBI and OPBI were recorded to confirm the structure. These spectra along with the peak assignments are shown in Figures S9 and S10.…”

Section: ■ Experimental Sectionmentioning

confidence: 99%

“…7 Therefore, an alternate PEM is required that can circumvent all these drawbacks and can replace Nafion to make it possible for practical implementation of MFCs. Like the Nafion structure where sulfonic groups help in proton conductivity, many researchers have proposed various sulfonated aromatic polymers such as sulfonated polyether ether ketone (SPEEK), 9 poly(arylene ether sulfone) (SPAES), 10 sulfophenylated polyphenylene, 11 sulfonated polyarylene ether ether ketone (SPAEEK), 12 sulfonated poly(aryl ether), 13 sulfonated polyimide (SPI), 14,15 etc., which have less cost and are easy to synthesize. Other polymers such as poly(vinyl alcohol), 16 polyhydroxyalkanoates, 17 poly(phenylene)sulfide, 18,19 organic agar, 20 and polystyrene 21 without sulfonic groups have also been successfully used in MFCs.…”

Section: ■ Introductionmentioning

confidence: 99%

Sulfonated Polybenzimidazole as a PEM in a Microbial Fuel Cell: An Efficient Strategy for Green Energy Generation and Wastewater Cleaning

Subhadarshini

Sravan

Sarkar

et al. 2023

ACS Appl. Energy Mater.

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A microbial fuel cell (MFC) is a bioelectrochemical system that has a dual application: producing renewable energy and simultaneously purifying dirty water. However, low power density and high installation cost are the major limitations. To overcome these problems and to replace the highly expensive Nafion which is used as a proton exchange membrane (PEM) in MFCs, here, in this study, a high-molecular weight sulfonated oxybispolybenzimidazole (MSOPBI) membrane has been made from the newly synthesized sulfonated diacid monomer in a readily executable synthetic path and cost-effective manner, and finally, the MSOPBI membrane has been tested in a dual-chamber MFC. The newly synthesized MSOPBI membrane displayed less water uptake, moderate ion exchange capacity (IEC) and proton conductivity in the hydrated state, low dimensional swelling, and phase-separated morphology with enhanced mechanical strength due to the more compact and rigid structure of the membrane owing to the crosslinking between the sulfonic functional group and imidazole group. It demonstrated a higher MFC performance because of the various favorable factors including morphological features. The MFC operation in the presence of the MSOPBI membrane when compared with that with Nafion showed an open-circuit voltage (OCV) of 345 mV, a power density of 280 mW/m 2 , and a current density of 2.2 mA/m 2 from the polarization curves with a relatively less voltage drop. Compared to Nafion, MSOPBI showed an increase in power density by 47%. Electrochemical analysis (OCV, cyclic voltammetry (CV), linear sweep voltammetry (LSV), Tafel curves) depicted the increased bioelectrochemical activity during the MFC operation in the presence of MSOPBI owing to its compositional and low-swelling characteristic functionality that impacted the decreased resistances and system losses toward enhanced power/energy output compared to that with the Nafion membrane. All these data together proved the effectiveness of the newly synthesized MSOPBI membrane for use in MFCs for the production of green energy and cleaning wastewater.

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Sandwich-structure PI/SPEEK/PI proton exchange membrane developed for achieving the high durability on excellent proton conductivity and stability

Cited by 33 publications

References 55 publications

Study of high‐temperature proton exchange membrane through one‐step encapsulation of ionic liquid in sulfonated poly(ether ether ketone)

Study of high‐temperature proton exchange membrane through one‐step encapsulation of ionic liquid in sulfonated poly(ether ether ketone)

SPEEK and SPPO Blended Membranes for Proton Exchange Membrane Fuel Cells

Sulfonated Polybenzimidazole as a PEM in a Microbial Fuel Cell: An Efficient Strategy for Green Energy Generation and Wastewater Cleaning

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