Issue 22, 2022

Enhanced proton conduction of crystalline organic salt hybrid membranes and the performance of fuel cells

Abstract

Among the components of a proton exchange membrane fuel cell (PEMFC), the proton exchange membrane (PEM) is an essential constituent part of the fuel cell. Here, a crystalline organic salt (HCOS-1) with amino and sulfonate groups has been synthesized. HCOS-1 exhibited a high proton conductivity of 3.23 × 10−3 S cm−1 at 100 °C and 93% relative humidity (RH). In order to improve its proton conductivity, HCOS-1 was blended with Nafion to prepare a composite membrane. At 100 °C and 98% RH, the composite membrane containing 6 wt% HCOS-1 exhibits a higher proton conductivity of 7.24 × 10−3 S cm−1, which is more than twice compared with 3.35 × 10−3 S cm−1 of the recast Nafion membrane. Compared with the recast Nafion membrane, the maximum power density of the hydrogen–oxygen fuel cell using the 6 wt% HCOS-1 composite membrane at 80 °C and 100% RH has increased by 9.95%, from 815 mW cm−2 to 896 mW cm−2.

Graphical abstract: Enhanced proton conduction of crystalline organic salt hybrid membranes and the performance of fuel cells

Supplementary files

Article information

Article type
Research Article
Submitted
06 Jul 2022
Accepted
19 Sep 2022
First published
22 Sep 2022

Mater. Chem. Front., 2022,6, 3402-3408

Enhanced proton conduction of crystalline organic salt hybrid membranes and the performance of fuel cells

Y. Yang, X. Chen, X. Li, F. Zhao, X. Bai and L. Cao, Mater. Chem. Front., 2022, 6, 3402 DOI: 10.1039/D2QM00656A

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