Improved chemical stability and proton selectivity of semi‐interpenetrating polymer network amphoteric membrane for vanadium redox flow battery application

Yu, Hailin; Xia, Yifan; Zhang, Hanwen; Gong, Xinjian; Geng, Pengfei; Gao, Zhenwei; Wang, Yinghan

doi:10.1002/app.49803

Cited by 8 publications

(8 citation statements)

References 49 publications

(76 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The surface and cross-section morphology of all the membranes were observed by scanning electron microscopy (SEM), which is shown in Figure . It can be clearly seen that the surfaces of all the membranes (Figure a–f) exhibit homogeneous and smooth morphologies, which is attributed to the excellent compatibility between OPBI and Co-BPPBI, since they have similar aromatic frameworks . Moreover, with increasing the concentration of bipyridine group in the copolymer the cross-section morphology of copolymers demonstrates the characteristics of tough polymers (Figure a 1 -d 1 ).…”

Section: Resultssupporting

confidence: 88%

Constructing High-Density Hydrogen Bonding Networks via Introducing the Bipyridine Group for High-Performance Fuel Cell Proton Exchange Membranes

Liu

Huang

et al. 2022

ACS Appl. Energy Mater.

View full text Add to dashboard Cite

Constructing high-density hydrogen bonding networks is crucial to improve the proton conductivity of proton exchange membranes (PEMs) and the single-cell output power of high-temperature fuel cells (HTFCs). In this work, a series of benzimidazole polymers containing a pyridine group in the backbone are successfully synthesized via copolymerization. The high-density hydrogen network is constructed via blending the polyether polybenzimidazole (OPBI) with the bipyridine polybenzimidazole copolymer, and the 1,3,5-triglycidyl isocyanurate that contains nitrogen atoms and hydroxyl groups is used as a cross-linking agent. As a result, the proton conductivity and the output power density of the single cell are significantly enhanced by the high-density hydrogen bonding network. The single-cell performance of 693 mW cm–2 is achieved in the cross-linked OPBI/copolymer blend membranes containing pyridine group under a saturated phosphoric acid (PA) adsorption (284%). Even under the low PA uptake (178%), the proton conductivity (0.050 S cm–1) is 2.1 times that of the OPBI membrane (0.024 S cm–1), and the output power density of the single-cell performance (501 mW cm–2) is 1.4 times that of the OPBI membrane (358 mW cm–2). The results demonstrate that introducing nitrogen sites into polybenzimidazole cross-linked membranes is an effective strategy for preparing high-performance fuel cell PEMs.

show abstract

Section: Resultssupporting

confidence: 88%

Constructing High-Density Hydrogen Bonding Networks via Introducing the Bipyridine Group for High-Performance Fuel Cell Proton Exchange Membranes

Liu

Huang

et al. 2022

ACS Appl. Energy Mater.

View full text Add to dashboard Cite

show abstract

“…The preparation of SPAES was similar to our previous study, 35 the synthesis procedure of SPAES was shown in Figure 1 and it could be described as following: DFDPS (6.0 mmol, 1.526 g), SDFDPS (6.0 mmol, 2.750 g), BPA (12.0 mmol, 2.739 g) and K 2 CO 3 (28.8 mmol, 3.980 g) were added into a 100 ml three-neck flask with condenser, gas adapter, mechanical stirrer and Dean-Stark trap. Then 24 ml NMP and 12 ml toluene were charged into the reactor under nitrogen atmosphere.…”

Section: Synthesis Of Spaesmentioning

confidence: 66%

“…The peaks at 1026 cm À1 and 1095 cm À1 are attributed to the stretching vibration of O¼S¼O of sulfonic acid group. 35…”

Section: Chemical Structure Evaluationmentioning

confidence: 99%

Sulfonated poly (arylene ether sulfone)-graft-sulfonated poly (vinyl alcohol) proton exchange membranes: Improved proton selectivity

Wang

2020

High Performance Polymers

Self Cite

View full text Add to dashboard Cite

Aldehyde terminated sulfonated poly (arylene ether sulfone) (SPAES-CHO) is prepared by a series of nucleophilic substitution reaction based on SPAES in this paper. Novel SPAES-graft-SPVA (SPAES-g-SPVA) membranes are fabricated by acetal reaction between SPAES-CHO and different amounts of sulfonated poly (vinyl alcohol) (SPVA). The 1H-NMR and FTIR indicate the successful preparation of SPAES-CHO and SPAES-g-SPVA membranes. With the introduction of SPVA, the SPAES-g-SPVA membranes have much lower methanol permeability than pure SPAES membrane and Nafion117 membrane. The methanol permeability coefficients of the SPAES-g-SPVA membranes decrease from 3.41 × 10−7 cm2 s−1 to 1.67 × 10−7 cm2 s−1 with the increase of SPVA content. And the proton conductivity of all the membranes is higher than 15 mS cm−1 at 25°C. Moreover, SPAES-g-SPVA membranes exhibit high proton selectivity. Especially, SPAES-g-SPVA-30% membrane has the highest proton selectivity, which is nearly five times higher than Nafion117.

show abstract

“…Currently, the Nafion® commercial membrane is widely used in VRFB. Nafion has high proton conductivity and excellent chemical stability; its high permeability to vanadium ions and high cost however prevent a wide commercial application of VRFB 4–6 . Therefore, alternative materials are under intense research.…”

Section: Introductionmentioning

confidence: 99%

Optimization through response surface methodology of 3D printed membrane preparation conditions for use in vanadium redox flow battery: A vanadium/proton selectivity study

Thiam

Magri

Vaudreuil

2023

J of Applied Polymer Sci

View full text Add to dashboard Cite

SPEEK membrane applicable in Vanadium Redox Flow Battery (VRFB) have been 3D printed via Fused Deposition Modeling (FDM). Response Surface Methodology (RSM) has been used to optimize conditions for 3D printing membrane. Good membranes characteristics were obtained by manipulating three parameters, namely the printing temperature, the orientation of the printing layer and the sulfonation time. We evaluated the effects of these three variables on the permeability of membranes to protons and vanadium ions. Results have shown that sulfonation is the most significant variable influencing vanadium and proton permeability. The optimal printing conditions were found at 408°C temperature with a horizontal layer orientation, while the best sulfonation is obtained at 6 min. The optimal membrane has an ion exchange capacity of 0.86 mmolg−1, a water uptake ratio of 22%, a VO2+ permeability of 6.1 × 10−8 cm2 min−1, a H+ permeability of 7.0 × 10−6 cm2 min−1, excellent mechanical stability and better H+/VO2+ perm selectivity than conventional sulfonated polyether ether ketone (SPEEK), Fap450 and Nafion211 membranes. The above results show that the 3D‐SPEEK membrane has great advantages and broad prospects for VRFB applications.

show abstract

Improved chemical stability and proton selectivity of semi‐interpenetrating polymer network amphoteric membrane for vanadium redox flow battery application

Cited by 8 publications

References 49 publications

Constructing High-Density Hydrogen Bonding Networks via Introducing the Bipyridine Group for High-Performance Fuel Cell Proton Exchange Membranes

Constructing High-Density Hydrogen Bonding Networks via Introducing the Bipyridine Group for High-Performance Fuel Cell Proton Exchange Membranes

Sulfonated poly (arylene ether sulfone)-graft-sulfonated poly (vinyl alcohol) proton exchange membranes: Improved proton selectivity

Optimization through response surface methodology of 3D printed membrane preparation conditions for use in vanadium redox flow battery: A vanadium/proton selectivity study

Contact Info

Product

Resources

About