Composite Polymer Anion Exchange Membranes with Sandwich Structure and Improved Performance for Zn–Air Battery
In this study, we fabricated a composite polymer anion exchange membrane (AEM) with a sandwich structure. This prepared AEM demonstrated high ionic conductivity (0.25 Scm<sup>−1</sup>), excellent alkali resistance (8 M KOH), and good mechanical properties (tensile strength of 0.455 MPa a...
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doaj-723838630cec42a09a67828d42c69cf02021-03-23T00:05:23ZengMDPI AGMembranes2077-03752021-03-011122422410.3390/membranes11030224Composite Polymer Anion Exchange Membranes with Sandwich Structure and Improved Performance for Zn–Air BatteryXiaoxia Cai0Yuansong Zhang1Cong Li2Guotao Zhang3Xiaotao Wang4Xian Zhang5Qiang Wang6Fuzhong Wang7School of Materials Science & Engineering, Qilu University of Technology (Shandong Academy of Sciences), Jinan 250353, ChinaSchool of Materials Science & Engineering, Qilu University of Technology (Shandong Academy of Sciences), Jinan 250353, ChinaState Key Laboratory of Biobased Material and Green Papermaking, Qilu University of Technology (Shandong Academy of Sciences), Jinan 250353, ChinaSchool of Materials Science & Engineering, Qilu University of Technology (Shandong Academy of Sciences), Jinan 250353, ChinaSchool of Materials Science & Engineering, Qilu University of Technology (Shandong Academy of Sciences), Jinan 250353, ChinaSchool of Materials Science & Engineering, Qilu University of Technology (Shandong Academy of Sciences), Jinan 250353, ChinaState Key Laboratory of Biobased Material and Green Papermaking, Qilu University of Technology (Shandong Academy of Sciences), Jinan 250353, ChinaSchool of Materials Science & Engineering, Qilu University of Technology (Shandong Academy of Sciences), Jinan 250353, ChinaIn this study, we fabricated a composite polymer anion exchange membrane (AEM) with a sandwich structure. This prepared AEM demonstrated high ionic conductivity (0.25 Scm<sup>−1</sup>), excellent alkali resistance (8 M KOH), and good mechanical properties (tensile strength of 0.455 MPa and elongation at break of 82.13%). Here, degrease cotton (DC) treated with LiOH/urea aqueous solution was used and immersed into a coagulation bath to form a film. This film was immersed in acrylic acid (AA) monomers, and in-suit polymerization was carried out in the presence of KOH and an initiator. Finally, a composite polymer membrane with sandwich structure was achieved, in which the upper and bottom layers were mainly composed of polymerized AA (PAA) while the central layer was mainly composed of DC derived film. The central layer acted as a skeleton to improve the mechanical properties and alkali resistance. The top and bottom layers (PAA-rich layers) acted as OH- ion transport carriers, making basic cations migrate along the main chain of PAA. This newly developed composite membrane showed increased tensile strength and an elongation at break of 2.7 and 1.5 times, respectively, when compared to a control PAA/KOH AEM film. Furthermore, an electrochemical stability window of 2.0 V was measured via the cyclic voltammetry curve test, showing a wide electrochemical window and promising application in Zn–Air batteries.https://www.mdpi.com/2077-0375/11/3/224alkaline solid polymer electrolyteanion exchange membranesPAAZn–Air batterydegrease cotton |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Xiaoxia Cai Yuansong Zhang Cong Li Guotao Zhang Xiaotao Wang Xian Zhang Qiang Wang Fuzhong Wang |
spellingShingle |
Xiaoxia Cai Yuansong Zhang Cong Li Guotao Zhang Xiaotao Wang Xian Zhang Qiang Wang Fuzhong Wang Composite Polymer Anion Exchange Membranes with Sandwich Structure and Improved Performance for Zn–Air Battery Membranes alkaline solid polymer electrolyte anion exchange membranes PAA Zn–Air battery degrease cotton |
author_facet |
Xiaoxia Cai Yuansong Zhang Cong Li Guotao Zhang Xiaotao Wang Xian Zhang Qiang Wang Fuzhong Wang |
author_sort |
Xiaoxia Cai |
title |
Composite Polymer Anion Exchange Membranes with Sandwich Structure and Improved Performance for Zn–Air Battery |
title_short |
Composite Polymer Anion Exchange Membranes with Sandwich Structure and Improved Performance for Zn–Air Battery |
title_full |
Composite Polymer Anion Exchange Membranes with Sandwich Structure and Improved Performance for Zn–Air Battery |
title_fullStr |
Composite Polymer Anion Exchange Membranes with Sandwich Structure and Improved Performance for Zn–Air Battery |
title_full_unstemmed |
Composite Polymer Anion Exchange Membranes with Sandwich Structure and Improved Performance for Zn–Air Battery |
title_sort |
composite polymer anion exchange membranes with sandwich structure and improved performance for zn–air battery |
publisher |
MDPI AG |
series |
Membranes |
issn |
2077-0375 |
publishDate |
2021-03-01 |
description |
In this study, we fabricated a composite polymer anion exchange membrane (AEM) with a sandwich structure. This prepared AEM demonstrated high ionic conductivity (0.25 Scm<sup>−1</sup>), excellent alkali resistance (8 M KOH), and good mechanical properties (tensile strength of 0.455 MPa and elongation at break of 82.13%). Here, degrease cotton (DC) treated with LiOH/urea aqueous solution was used and immersed into a coagulation bath to form a film. This film was immersed in acrylic acid (AA) monomers, and in-suit polymerization was carried out in the presence of KOH and an initiator. Finally, a composite polymer membrane with sandwich structure was achieved, in which the upper and bottom layers were mainly composed of polymerized AA (PAA) while the central layer was mainly composed of DC derived film. The central layer acted as a skeleton to improve the mechanical properties and alkali resistance. The top and bottom layers (PAA-rich layers) acted as OH- ion transport carriers, making basic cations migrate along the main chain of PAA. This newly developed composite membrane showed increased tensile strength and an elongation at break of 2.7 and 1.5 times, respectively, when compared to a control PAA/KOH AEM film. Furthermore, an electrochemical stability window of 2.0 V was measured via the cyclic voltammetry curve test, showing a wide electrochemical window and promising application in Zn–Air batteries. |
topic |
alkaline solid polymer electrolyte anion exchange membranes PAA Zn–Air battery degrease cotton |
url |
https://www.mdpi.com/2077-0375/11/3/224 |
work_keys_str_mv |
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