Crucial role of side-chain functionality in anion exchange membranes: Properties and alkaline fuel cell performance

Chu, Xiaomeng; Liu, Jiaye; Miao, Shasha; Liu, Lei; Huang, Yingda; Tang, Erjun; Li, Shaojie; Xing, Xuteng; Li, Nanwen

doi:10.1016/j.memsci.2021.119172

Cited by 55 publications

(50 citation statements)

References 46 publications

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“…To further validate the critical role of the ordered microchannel structure of the 2D COF in the improvement of hydroxide conduction, the hydroxide conductivity of the TJU-1 membrane is compared with that of the state-of-the-art AEMs. 36–57 Fig. 5c illustrates that the TJU-1 membrane exhibits relatively high IEC and hydroxide conductivity among the AEMs, which is reasonably ascribed to the well-connected channels within TJU-1.…”

Section: Resultsmentioning

confidence: 85%

A covalent organic framework membrane with enhanced directional ion nanochannels for efficient hydroxide conduction

Chen

Zhang

et al. 2022

J. Mater. Chem. A

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Section: Resultsmentioning

confidence: 85%

A covalent organic framework membrane with enhanced directional ion nanochannels for efficient hydroxide conduction

Chen

Zhang

et al. 2022

J. Mater. Chem. A

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“…The high costs of PEM membranes and metal electro-catalysts are major concerns regarding commercialization [ 4 ]. Alternatively, the alkaline fuel cells are beneficial for favorable kinetic reactions at both the cathode and the anode [ 6 , 7 , 8 , 9 ]. Cost-effective catalysts, such as non-noble metals, metal oxides, and carbonaceous nanocomposites, can be used as effective electro-catalysts [ 10 , 11 , 12 ].…”

Section: Introductionmentioning

confidence: 99%

Swelling-Resistant, Crosslinked Polyvinyl Alcohol Membranes with High ZIF-8 Nanofiller Loadings as Effective Solid Electrolytes for Alkaline Fuel Cells

Hsu

Kumar

et al. 2022

Nanomaterials

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The present work investigates the direct mixing of aqueous zeolitic imidazolate framework-8 (ZIF-8) suspension into a polyvinyl alcohol (PVA) and crosslinked with glutaraldehyde (GA) to form swelling-resistant, mechanically robust and conductivity retentive composite membranes. This drying-free nanofiller incorporation method enhances the homogeneous ZIF-8 distributions in the PVA/ZIF-8/GA composites to overcome the nanofiller aggregation problem in the mixed matrix membranes. Various ZIF-8 concentrations (25.4, 40.5 and 45.4 wt.%) are used to study the suitability of the resulting GA-crosslinked composites for direct alkaline methanol fuel cell (DAMFC). Surface morphological analysis confirmed homogeneous ZIF-8 particle distribution in the GA-crosslinked composites with a defect- and crack-free structure. The increased ionic conductivity (21% higher than the ZIF-free base material) and suppressed alcohol permeability (94% lower from the base material) of PVA/40.5%ZIF-8/GA resulted in the highest selectivity among the prepared composites. In addition, the GA-crosslinked composites’ selectivity increased to 1.5–2 times that of those without crosslink. Moreover, the ZIF-8 nanofillers improved the mechanical strength and alkaline stability of the composites. This was due to the negligible volume swelling ratio (<1.4%) of high (>40%) ZIF-8-loaded composites. After 168 h of alkaline treatment, the PVA/40.5%ZIF-8/GA composite had almost negligible ionic conductivity loss (0.19%) compared with the initial material. The maximum power density (Pmax) of PVA/40.5%ZIF-8/GA composite was 190.5 mW cm−2 at 60 °C, an increase of 181% from the PVA/GA membrane. Moreover, the Pmax of PVA/40.5%ZIF-8/GA was 10% higher than that without GA crosslinking. These swelling-resistant and stable solid electrolytes are promising in alkaline fuel cell applications.

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“…Based on the material and fuel type, several fuel cells have been reported, such as proton exchange membrane (polymer electrolyte) fuel cells (PEMFCs) [8][9][10][11], direct methanol fuel cell (DMFCs) [12][13][14], alkaline fuel cells (AFCs) [15][16][17], and solid oxide fuel cells (SOFCs) [18,19]. Among the fuel cells, PEMFC technologies have received worldwide intense attention due to their high efficiencies, low emissions, and high power density.…”

Section: Introductionmentioning

confidence: 99%

Development of WO3–Nafion Based Membranes for Enabling Higher Water Retention at Low Humidity and Enhancing PEMFC Performance at Intermediate Temperature Operation

et al. 2022

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The proton exchange membrane (PEM) represents a pivotal material and a key challenge in developing fuel cell science and hydrogen technology. Nafion is the most promising polymer which will lead to its commercialisation. Hybrid membranes of nanosized tungsten oxide (WO3) and Nafion were fabricated, characterised, and tested in a single cell. The incorporation of 10 wt.% WO3 resulted in 21% higher water uptake, 11.7% lower swelling ratio, almost doubling the hydration degree, and 13% higher mechanical stability of the hybrid membrane compared to the Nafion XL. Compared to commercial Nafion XL, the rNF–WO-10 hybrid membrane showed an 8.8% and 20% increase in current density of the cell at 0.4 V operating at 80 and 95 °C with 1.89 and 2.29 A/cm2, respectively. The maximum power density has increased by 9% (0.76 W/cm2) and 19.9% (0.922 W/cm2) when operating at the same temperatures compared to the commercial Nafion XL membrane. Generally, considering the particular structure of Nafion XL, our Nafion-based membrane with 10 wt. % WO3 (rNF–WO-10) is a suitable PEM with a comparable performance at different operating conditions.

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Crucial role of side-chain functionality in anion exchange membranes: Properties and alkaline fuel cell performance

Cited by 55 publications

References 46 publications

A covalent organic framework membrane with enhanced directional ion nanochannels for efficient hydroxide conduction

A covalent organic framework membrane with enhanced directional ion nanochannels for efficient hydroxide conduction

Swelling-Resistant, Crosslinked Polyvinyl Alcohol Membranes with High ZIF-8 Nanofiller Loadings as Effective Solid Electrolytes for Alkaline Fuel Cells

Development of WO3–Nafion Based Membranes for Enabling Higher Water Retention at Low Humidity and Enhancing PEMFC Performance at Intermediate Temperature Operation

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