Toggle Main Menu Toggle Search

Open Access padlockePrints

A polybenzimidazole/sulfonated graphite oxide composite membrane for high temperature polymer electrolyte membrane fuel cells

Lookup NU author(s): Chenxi Xu, Dr Yuancheng Cao, Dr Xu Wu, Xu Wang, Emeritus Professor Keith Scott

Downloads

Full text for this publication is not currently held within this repository. Alternative links are provided below where available.


Abstract

Polybenzimidazole/graphite oxide (PBI/GO) and PBI/sulfonated graphite oxide composite membranes were prepared for high temperature polymer electrolyte membrane fuel cells. The membranes were loaded with phosphoric acid to provide suitable proton conductivity. The PBI/GO and PBI/SGO membranes were characterized by XRD which showed that the d-spacing reflection (001) of SGO in PBI matrix was shifted from 2 theta = 11 degrees, meaning that the PBI molecules were intercalated into the SGO layers during the membrane preparation process. A low acid loading level reduced the free acid in the membranes which avoided water loss and thus conductivity loss. The ionic conductivities of the PBI/ GO and PBI/ SGO membranes, with low acid loading, were 0.027 S cm(-1) and 0.052 S cm(-1) at 175 degrees C and 0% humidity. Fuel cell performance with SGO/PBI membranes gave a maximum power density of 600 mW cm(-2) at 175 degrees C.


Publication metadata

Author(s): Xu CX, Cao YC, Kumar R, Wu X, Wang X, Scott K

Publication type: Article

Publication status: Published

Journal: Journal of Materials Chemistry

Year: 2011

Volume: 21

Issue: 30

Pages: 11359-11364

Print publication date: 27/06/2011

ISSN (print): 0959-9428

ISSN (electronic): 1364-5501

Publisher: Royal Society of Chemistry

URL: http://dx.doi.org/10.1039/c1jm11159k

DOI: 10.1039/c1jm11159k


Altmetrics

Altmetrics provided by Altmetric


Funding

Funder referenceFunder name
fuel cell consortium
Supergen
EP/C002601EPSRC

Share