Issue 17, 2012

A high-performance anion exchange membrane based on bi-guanidinium bridged polysilsesquioxane for alkaline fuel cell application

Abstract

A bi-guanidinium bridged polysilsesquioxane composite membrane was fabricated for the first time, which showed impressive hydroxide conductivity and decent alkali-stability. Its direct borohydride fuel cell yielded a peak power density of 321 mW cm−2 at ca. 700 mA cm−2 and 40 °C, which is to our knowledge the highest ever achieved with an anion exchange membrane (AEM). The cell could discharge at 200 mA cm−2 for 50 h with voltage maintained at 0.76 V. The strong basicity and resonance of bi-guanidinium cations are the enabling factor for the good membrane properties and fuel cell performance. This work provides a new strategy for non-ammonium AEM fabrication, and the synthetic chemistry involved can possibly extend for fabricating versatile AEMs with similar structure.

Graphical abstract: A high-performance anion exchange membrane based on bi-guanidinium bridged polysilsesquioxane for alkaline fuel cell application

Supplementary files

Article information

Article type
Communication
Submitted
28 Nov 2011
Accepted
13 Mar 2012
First published
23 Mar 2012

J. Mater. Chem., 2012,22, 8203-8207

A high-performance anion exchange membrane based on bi-guanidinium bridged polysilsesquioxane for alkaline fuel cell application

C. Qu, H. Zhang, F. Zhang and B. Liu, J. Mater. Chem., 2012, 22, 8203 DOI: 10.1039/C2JM16211C

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