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Ion Exchange Membrane Polymer Materials: Preparation, Properties, and Applications

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A special issue of International Journal of Molecular Sciences (ISSN 1422-0067). This special issue belongs to the section "Macromolecules".

Deadline for manuscript submissions: closed (10 August 2023) | Viewed by 9455

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Dr. Bin Wu

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Anhui Province Key Laboratory of Environment-Friendly Polymer Materials, School of Chemistry & Chemical Engineering, Anhui University, Hefei 230601, China
Interests: design and construction of polymer-based composite and its application in ion selective separation and Integrated circuit thermal management
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Dear Colleagues,

Ion exchange membranes (IEMs), typically referring to polymeric materials tethered with charged moieties, paly significant roles in a wide range of fields of energy and environment, for instance fuel cells, flow batteries, electrodialysis, and diffusion dialysis, etc. The limited choice of commercially available IEMs has motivated extensive research interests involving the novel synthetic strategies, the valid characterization technique, as well as the promising applications. This special issue is to provide a platform to pool the wisdom of the masses, to advance this field with a focus on the aspects of mild, cost-effective preparation, profound understanding in ionic transportation mechanism, excellent overall performance, to promote the rapid development in related fields.

Dr. Bin Wu
Guest Editor

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Keywords

ion exchange membrane
fuel cells
redox flow batteries
ionic selective separation
electrodialysis
diffusion dialysis
thermal conductivity matierlas

Published Papers (5 papers)

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Research

14 pages, 3113 KiB

Open AccessArticle

Anion Exchange Membrane Based on BPPO/PECH with Net Structure for Acid Recovery via Diffusion Dialysis

by Haiyang Shen, Yifei Gong, Wei Chen, Xianbiao Wei, Ping Li and Congliang Cheng

Int. J. Mol. Sci. 2023, 24(10), 8596; https://doi.org/10.3390/ijms24108596 - 11 May 2023

Cited by 5 | Viewed by 1658

Abstract

In order to improve the performance of the anion exchange membrane (AEM) used in acid recovery from industrial wastewater, this study adopted a new strategy in which brominated poly (2,6-dimethyl-1,4-phenyleneoxide) (BPPO) and polyepichlorohydrin (PECH) were used as the polymer backbone of the prepared membrane. The new anion exchange membrane with a net structure was formed by quaternizing BPPO/PECH with N,N,N,N-tetramethyl-1,6-hexanediamine (TMHD). The application performance and physicochemical property of the membrane were adjusted by changing the content of PECH. The experimental study found that the prepared anion exchange membrane had good mechanical performance, thermostability, acid resistance and an appropriate water absorption and expansion ratio. The acid dialysis coefficient (U_H⁺) of anion exchange membranes with different contents of PECH and BPPO was 0.0173–0.0262 m/h at 25 °C. The separation factors (S) of the anion exchange membranes were 24.6 to 27.0 at 25 °C. Compared with the commercial BPPO membrane (DF-120B), the prepared membrane had higher values of U_H⁺ and S in this paper. In conclusion, this work indicated that the prepared BPPO/PECH anion exchange membrane had the potential for acid recovery using the DD method. Full article

(This article belongs to the Special Issue Ion Exchange Membrane Polymer Materials: Preparation, Properties, and Applications)

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16 pages, 3769 KiB

Open AccessArticle

Thermodynamic Modeling and Exergy Analysis of A Combined High-Temperature Proton Exchange Membrane Fuel Cell and ORC System for Automotive Applications

by Yanju Li, Mingfei Yang, Zheshu Ma, Meng Zheng, Hanlin Song and Xinjia Guo

Int. J. Mol. Sci. 2022, 23(24), 15813; https://doi.org/10.3390/ijms232415813 - 13 Dec 2022

Cited by 1 | Viewed by 1755

Abstract

A combined system consisting of a high-temperature proton exchange membrane fuel cell (HT-PEMFC) and an organic Rankine cycle (ORC) is provided for automotive applications in this paper. The combined system uses HT-PEMFC stack cathode exhaust gas to preheat the inlet gas and the ORC to recover the waste heat from the stack. The model of the combined system was developed and the feasibility of the model was verified. In addition, the evaluation index of the proposed system was derived through an energy and exergy analysis. The numerical simulation results show that the HT-PEMFC stack, cathode heat exchanger, and evaporator contributed the most to the total exergy loss of the system. These components should be optimized as a focus of future research to improve system performance. The lower current density increased the ecological function and the system efficiency, but reduced the system’s net out-power. A higher inlet temperature and higher hydrogen pressures of the stack and the lower oxygen pressure helped improve the system performance. Compared to the HT-PEFC system without an ORC subsystem, the output power of the combined system was increased by 12.95%. Full article

(This article belongs to the Special Issue Ion Exchange Membrane Polymer Materials: Preparation, Properties, and Applications)

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13 pages, 2801 KiB

Open AccessArticle

Performance Analysis Based on Sustainability Exergy Indicators of High-Temperature Proton Exchange Membrane Fuel Cell

by Xinjia Guo, Bing Xu, Zheshu Ma, Yanju Li and Dongxu Li

Int. J. Mol. Sci. 2022, 23(17), 10111; https://doi.org/10.3390/ijms231710111 - 4 Sep 2022

Cited by 6 | Viewed by 1675

Abstract

Based on finite-time thermodynamics, an irreversible high-temperature proton exchange membrane fuel cell (HT-PEMFC) model is developed, and the mathematical expressions of exergy efficiency, exergy destruction index (

E D I

), and exergy sustainability indicators (

E S I

) of HT-PEMFC are [...] Read more.

E D I

), and exergy sustainability indicators (

E S I

) of HT-PEMFC are derived. According to HT-PEMFC model, the influences of thermodynamic irreversibility on exergy sustainability of HT-PEMFC are researched under different operating parameters that include operating temperatures, inlet pressure, and current density. The results show that the higher operating temperature and inlet pressure of HT-PEMFCs is beneficial to performance improvement. In addition, the single cell performance gradually decreases with increasing current density due to the presence of the irreversibility of HT-PEMFC. Full article

(This article belongs to the Special Issue Ion Exchange Membrane Polymer Materials: Preparation, Properties, and Applications)

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13 pages, 5138 KiB

Open AccessArticle

Performance Analysis of a HT-PEMFC System with 6FPBI Membranes Doped with Cross-Linkable Polymeric Ionic Liquid

by Yanju Li, Wei Shao, Zheshu Ma, Meng Zheng and Hanlin Song

Int. J. Mol. Sci. 2022, 23(17), 9618; https://doi.org/10.3390/ijms23179618 - 25 Aug 2022

Cited by 3 | Viewed by 1706

Abstract

In this paper, a high-temperature proton-exchange membrane fuel cell (HT-PEMFC) system using fluorine-containing polybenzimidazole (6FPBI) composite membranes doped with cross-linkable polymer ionic liquid (cPIL) is developed and studied. The reliability of the model is verified by a comparison with the experimental data. The performance of the HT-PEMFC system using 6FPBI membranes with different levels of cPIL is analyzed. The results show that when the HT-PEMFC uses 6FPBI membranes with a cPIL content of 20 wt % (6FPBI-cPIL 20 membranes), the single cell power density is 4952.3

W \cdot m^{- 2}

. The excessive cPIL content will lead to HT-PEMFC performance degradation. The HT-PEMFC system using the 6FPBI-cPIL 20 membranes shows a higher performance, even at higher temperatures and pressures, than the systems using 6FPBI membranes. In addition, the parametric study results suggest that the HT-PEMFC system should be operated at a higher inlet temperature and hydrogen pressure to increase system output power and efficiency. The oxygen inlet pressure should be reduced to decrease the power consumption of the ancillary equipment and improve system efficiency. The proposed model can provide a prediction for the performance of HT-PEMFC systems with the application of phosphoric-acid-doped polybenzimidazole (PA-PBI) membranes. Full article

(This article belongs to the Special Issue Ion Exchange Membrane Polymer Materials: Preparation, Properties, and Applications)

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17 pages, 3707 KiB

Open AccessArticle

Finite Time Thermodynamic Modeling and Performance Analysis of High-Temperature Proton Exchange Membrane Fuel Cells

by Dongxu Li, Zheshu Ma, Wei Shao, Yanju Li and Xinjia Guo

Int. J. Mol. Sci. 2022, 23(16), 9157; https://doi.org/10.3390/ijms23169157 - 15 Aug 2022

Cited by 8 | Viewed by 1983

Abstract

In order to improve the output performance of high-temperature proton exchange membrane fuel cells (HT-PEMFC), a finite time thermodynamic (FTT) model for HT-PEMFC was established. Several finite time thermodynamic indexes including power density, thermodynamic efficiency, exergy efficiency, exergetic performance efficient (EPC), entropy production rate and ecological coefficient of performance (ECOP) were derived. The energetic performance, exergetic performance and ecological performance of the HT-PEMFC were analyzed under different parameters. Results showed that operating temperature, doping level and thickness of membrane had a significant effect on the performance of HT-PEMFC and the power density increased by 58%, 31.1% and 44.9%, respectively. When the doping level reached 8, the output performance of HT-PEMFC wa optimal. The operating pressure and relative humidity had little influence on the HT-PEMFC and the power density increased by 8.7%% and 17.6%, respectively. Full article

(This article belongs to the Special Issue Ion Exchange Membrane Polymer Materials: Preparation, Properties, and Applications)

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