skip to main content
OSTI.GOV title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: Alkaline membrane fuel cells with in-situ cross-linked ionomers

; ; ;
Publication Date:
Sponsoring Org.:
USDOE Advanced Research Projects Agency - Energy (ARPA-E)
OSTI Identifier:
Grant/Contract Number:
Resource Type:
Journal Article: Publisher's Accepted Manuscript
Journal Name:
Electrochimica Acta
Additional Journal Information:
Journal Volume: 152; Journal Issue: C; Related Information: CHORUS Timestamp: 2016-09-14 19:41:33; Journal ID: ISSN 0013-4686
Country of Publication:
United Kingdom

Citation Formats

Leng, Yongjun, Wang, Lizhu, Hickner, Michael A., and Wang, Chao-Yang. Alkaline membrane fuel cells with in-situ cross-linked ionomers. United Kingdom: N. p., 2015. Web. doi:10.1016/j.electacta.2014.11.055.
Leng, Yongjun, Wang, Lizhu, Hickner, Michael A., & Wang, Chao-Yang. Alkaline membrane fuel cells with in-situ cross-linked ionomers. United Kingdom. doi:10.1016/j.electacta.2014.11.055.
Leng, Yongjun, Wang, Lizhu, Hickner, Michael A., and Wang, Chao-Yang. 2015. "Alkaline membrane fuel cells with in-situ cross-linked ionomers". United Kingdom. doi:10.1016/j.electacta.2014.11.055.
title = {Alkaline membrane fuel cells with in-situ cross-linked ionomers},
author = {Leng, Yongjun and Wang, Lizhu and Hickner, Michael A. and Wang, Chao-Yang},
abstractNote = {},
doi = {10.1016/j.electacta.2014.11.055},
journal = {Electrochimica Acta},
number = C,
volume = 152,
place = {United Kingdom},
year = 2015,
month = 1

Journal Article:
Free Publicly Available Full Text
Publisher's Version of Record at 10.1016/j.electacta.2014.11.055

Citation Metrics:
Cited by: 12works
Citation information provided by
Web of Science

Save / Share:
  • Improving cell performance and durability through both new materials and membrane electrode processing optimization is needed for the commercialization of alkaline membrane fuel cell (AMFC) technologies. In this work, we adopted an in-situ cross-linking strategy of an anion-conducting block copolymer to prepare durable ionomers for use in alkaline membrane fuel cells (AMFCs). Our goal was to use new ionomers and binders with an aim at improving long-term stability of AMFCs, especially at high operation temperatures. At 80 degrees C, AMFCs with in-situ cross-linked ionomers showed promising stability with an operating life time of more than 350 hours at 100 mA/cm(2).more » We found that the optimized electrode fabrication process and operating conditions can significantly improve the durability performance of AMFCs. For example, a suitable electrode binder in addition to the ion-conducting ionomer can greatly enhance the durability performance of AMFCs. Operating fuel cells under a cathode over-humification condition can also enhance the long-term stability of AMFCs. (C) 2014 Elsevier Ltd. All rights reserved.« less
  • Fuel cells are energy conversion devices that show great potential in numerous applications ranging from automobiles to portable electronics. However, further development of fuel cell components is necessary for them to become commercially viable. One component critical to their performance is the polymer electrolyte membrane, which is an ion conductive medium separating the two electrodes. While proton conducting membranes are well established (e.g., Nafion), hydroxide conducting membranes (alkaline anion exchange membranes, AAEMs) have been relatively unexplored by comparison. Operating under alkaline conditions offers significant efficiency benefits, especially for the oxygen reduction reaction; therefore, effective AAEMs could significantly advance fuel cellmore » technologies. Here we demonstrate the use of ring-opening metathesis polymerization to generate new cross-linked membrane materials exhibiting high hydroxide ion conductivity and good mechanical properties. Cross-linking allows for increased ion incorporation, which, in turn supports high conductivities. This facile synthetic approach enables the preparation of cross-linked materials with the potential to meet the demands of hydrogen-powered fuel cells as well as direct methanol fuel cells.« less
  • Random copolymers of isoprene and 4-vinylbenzyl chloride (VBCl) with varying compositions were synthesized via nitroxide-mediated polymerization. Subsequent quaternization afforded solvent processable and cross-linkable ionomers with a wide range of ion exchange capacities (IECs). Solution cast membranes were thermally cross-linked to form anion exchange membranes. Cross-linking was achieved by taking advantage of the unsaturations on the polyisoprene backbone, without added cross-linkers. A strong correlation was found between water uptake and ion conductivity of the membranes: conductivities of the membranes with IECs beyond a critical value were found to be constant related to their high water absorption. Environmentally controlled small-angle X-ray scatteringmore » experiments revealed a correlation between the average distance between ionic clusters and the ion conductivity, indicating that a well-connected network of ion clusters is necessary for efficient ion conduction and high ion conductivity.« less