Anion exchange membrane crosslinked in the easiest way stands out for fuel cells

Hossain, Md. Masem; Wu, Liang; Liang, Xian; Yang, Zhengjin; Hou, Jianqiu

doi:10.1016/j.jpowsour.2018.04.064

Cited by 78 publications

(49 citation statements)

References 42 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The simplest method for introducing quaternary ammonium (QA) functionalities onto the polymer is reacting a benzyl halide with tertiary amines (typically, trimethyl amine: TMA). 23,24 These membranes show relatively high ion conductivity but suffer from low stability against hydroxide ion attack partly due to the vicinity of electron donating aryl rings and reactive a-carbons. 25 To avoid this degradation mechanism, there have been many studies focusing on polymers with pendant alkyl chains to distance the QA groups from the polymer backbone.…”

Section: Introductionmentioning

confidence: 99%

Partially fluorinated copolymers containing pendant piperidinium head groups as anion exchange membranes for alkaline fuel cells

et al. 2019

View full text Add to dashboard Cite

show abstract

Section: Introductionmentioning

confidence: 99%

Partially fluorinated copolymers containing pendant piperidinium head groups as anion exchange membranes for alkaline fuel cells

et al. 2019

View full text Add to dashboard Cite

show abstract

“…Covent cross‐linking can effectively improve the mechanical strength and chemical stability under alkaline conditions since it can reinforce the chains entanglement between polymers . Most cross‐linkers used in AEMs contained one or more quaternary ammoniums to connect the polymer chains to increase the concentration of OH − , thus improving the ionic conductivity; however, ammoniums are easy to be attacked by OH − , resulting in decreased mechanical properties and alkaline stability.…”

Section: Introductionmentioning

confidence: 99%

“…Covent cross-linking can effectively improve the mechanical strength and chemical stability under alkaline conditions since it can reinforce the chains entanglement between polymers. [33][34][35][36] Most cross-linkers used in AEMs contained one or more quaternary ammoniums to connect the polymer chains to increase the concentration of OH − , thus improving the ionic conductivity; however, ammoniums are easy to be attacked by OH − , resulting in decreased mechanical properties and alkaline stability. We have focused on developing proton/anion exchange membranes several years, 32,[37][38][39][40][41][42][43][44][45][46][47][48][49] herein, to improve the ionic conductivity of alkali-doped PBIs without scarifying mechanical robust and alkali stability.…”

Section: Introductionmentioning

confidence: 99%

Alkali‐doped hyperbranched cross‐linked polybenzimidazoles containing benzyltrimethyl ammoniums with improved ionic conductivity as alkaline direct methanol fuel cell membranes

Gao

Fang

et al. 2020

Int J Energy Res

View full text Add to dashboard Cite

Summary Development of anion exchange membranes (AEMs) with good performance, such as high conductivity, good alkaline stability and mechanical strength, has been a hot topic for the fuel cell application. Here, a novel kind of hyperbranched cross‐linker decorated with quaternary ammonium groups was introduced to polybenzimidazole (PBI) membranes and QOPBI‐x membranes (where x is the weight ratio of the hyperbranched cross‐linker). Compared with the linear OPBI membrane (0.091 S cm−1), QOPBI‐x membranes displayed an improved ionic conductivity (up to 0.122 S cm−1) at 60°C after they were doped in 6 M KOH for 7 days. The KOH‐doped QOPBI‐x membranes also exhibited a high tensile strength (54.5‐61.7 MPa) and superior alkaline stability. There is almost no decline in the ionic conductivity after being immersed in a 6 M KOH solution for 30 days. In addition, the alkaline direct methanol fuel cell (ADMFC) performance based on the KOH‐doped OPBI and QOPBI‐x membranes is described. The QOPBI‐15 membrane displayed good performance (75.6 mW cm−2), which is 33.3% higher than the OPBI membrane (56.7 mW cm−2).

show abstract

“…In contrast, the cathode reaction kinetics of anion exchange membrane (AEM) fuel cells (AEMFCs) can be greatly enhanced due to the strongly alkaline environment, and nonprecious metal catalysts such as Ni, Co, Fe and Mn-based catalysts can be used. Therefore, they are considered as a promising alternative to PEMFCs (especially in the field of portable/ fixed/standby power supplies) [10,11].…”

Section: Introductionmentioning

confidence: 99%

Poly(aryl ether nitrile)s containing flexible side-chain-type quaternary phosphonium cations as anion exchange membranes

et al. 2019

View full text Add to dashboard Cite

In order to effectively improve the properties of anion exchange membrane (AEM) materials, a series of novel poly(aryl ether nitrile)s with flexible side-chain-type quaternary phosphonium cations (PAEN-TPP-x) were designed and prepared on the basis of considering the influences of polymer backbone, cationic group species and the connection way between the cations and polymer chains. The synthetic method, structure and ion-exchange capacity, water absorption, swelling, hydroxide conductivity and alkaline stability of the obtained AEMs were studied. A comparative study with other reported AEMs was also performed for further exploration of the relationship between the structure and properties. These AEMs with flexible side-chain-type quaternary phosphonium cations displayed good comprehensive properties. Their water uptakes and swelling ratios were in the range of 11.6%-22.7% and 4.4%-7.8% at 60°C, respectively. They had hydroxide conductivity in the range of 28.6-45.8 mS cm -1 at 60°C. Moreover, these AEMs also exhibited improved alkaline stability, and the hydroxide conductivity for PAEN-TPP-0.35 could remain 82.1% and 80.6% of its initial value at 60 and 90°C in 2 mol L −1 NaOH solution for 480 h, respectively.

show abstract

Anion exchange membrane crosslinked in the easiest way stands out for fuel cells

Cited by 78 publications

References 42 publications

Partially fluorinated copolymers containing pendant piperidinium head groups as anion exchange membranes for alkaline fuel cells

Partially fluorinated copolymers containing pendant piperidinium head groups as anion exchange membranes for alkaline fuel cells

Alkali‐doped hyperbranched cross‐linked polybenzimidazoles containing benzyltrimethyl ammoniums with improved ionic conductivity as alkaline direct methanol fuel cell membranes

Poly(aryl ether nitrile)s containing flexible side-chain-type quaternary phosphonium cations as anion exchange membranes

Contact Info

Product

Resources

About