Issue 12, 2022

Constructing effective ion channels in anion exchange membranes via exfoliated nanosheets towards improved conductivity for alkaline fuel cells

Abstract

A series of quaternized polysulfone (QPS)-based composite membranes containing various amounts of functionalized graphitic carbon nitride (f-g-C3N4) nanosheets were synthesized. The synergistic effects of the incorporated nanosheets were investigated on a variety of membrane properties for alkaline fuel cell application, such as hydroxyl ion conductivity, swelling ratio, water uptake, chemical stability, and cell performance. The well-interacting architecture of the f-g-C3N4 nanosheets containing multiple hydrophilic sites was the main reason for the enhanced hydroxide ion conductivity of the membrane. The QPS–CN-5 membrane showed a high hydroxide ion conductivity of 16–37 mS cm−1 in a temperature range from room temperature to 80 °C because of the highly interlocked ionic domains of the porous tris-triazine units in the f-g-C3N4 nanosheets. The single-cell test of QPS–CN-5 exhibited a maximum power density of 77 mW cm−2.

Graphical abstract: Constructing effective ion channels in anion exchange membranes via exfoliated nanosheets towards improved conductivity for alkaline fuel cells

Article information

Article type
Paper
Submitted
26 ዲሴም 2021
Accepted
01 ሜይ 2022
First published
09 ሜይ 2022

Mater. Adv., 2022,3, 4908-4919

Constructing effective ion channels in anion exchange membranes via exfoliated nanosheets towards improved conductivity for alkaline fuel cells

P. P. Sharma, M. Manohar and D. Kim, Mater. Adv., 2022, 3, 4908 DOI: 10.1039/D1MA01244D

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