Volume 46, Issue 12 pp. 17332-17345
RESEARCH ARTICLE

Enhancing anion conduction stability of quaternized poly(phenylene) oxide-based anion exchange membranes with ionic liquids modified carbon nanomaterials

Ning Wang

Ning Wang

Department of Chemistry, College of Sciences, Northeastern University, Shenyang, China

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Tingting Zuo

Tingting Zuo

Department of Chemistry, College of Sciences, Northeastern University, Shenyang, China

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Ke Liu

Ke Liu

Department of Chemistry, College of Sciences, Northeastern University, Shenyang, China

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Jing Jia

Jing Jia

Department of Chemistry, College of Sciences, Northeastern University, Shenyang, China

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Di Song

Di Song

Department of Chemistry, College of Sciences, Northeastern University, Shenyang, China

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Xiaoqing Wei

Xiaoqing Wei

Department of Chemistry, College of Sciences, Northeastern University, Shenyang, China

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Shu Hu

Shu Hu

Department of Chemistry, College of Sciences, Northeastern University, Shenyang, China

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Quantong Che

Corresponding Author

Quantong Che

Department of Chemistry, College of Sciences, Northeastern University, Shenyang, China

Correspondence

Quantong Che, Department of Chemistry, College of Sciences, Northeastern University, Shenyang 110819, China.

Email: [email protected]

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First published: 23 July 2022
Citations: 14

Funding information: Fundamental Research Funds for the Central Universities, Grant/Award Number: N2005001; National Natural Science Foundation of China, Grant/Award Number: 21703029

Summary

The anion exchange membrane (AEM) with high and stable conductivity is important to the commercial application of anion exchange membrane fuel cell. The AEM based on the polymer of quaternized poly(phenylene) oxide (QPPO) with enhanced anion conduction stability has been constructed through the introduction of the ionic liquid (IL) of 1-aminopropyl-3-methylimidazolium bromide (APMIMBr)-modified carbon nanomaterials, such as carbon nanotubes oxide (OCNT) and graphene oxide (GO) nanosheets. The IL-OCNT and IL-GO composites prevented hydroxyl groups from attacking the polymer of QPPO. Thus, QPPO/x(IL-OCNT) and QPPO/x(IL-GO) series membranes possessed enhanced hydroxide conductivity stability in alkaline solution. Specifically, QPPO/5%(IL-OCNT) and QPPO/5%(IL-GO) membranes exhibited the hydroxide conductivities of 23.0 and 28.5 mS/cm at 80°C. Notably, the hydroxide conductivities could reach 16.3 and 30.2 mS/cm while the prepared membranes were immersed in 2 M KOH solution for 1848 h. Furthermore, the stable hydroxide conductivity was derived from the fine dimension stability and mechanical property. The tensile stress values were, respectively, 19.4 and 19.8 MPa even if the membranes were immersed in alkaline solution. In the prepared QPPO/x(IL-OCNT) and QPPO/x(IL-GO) membranes,

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