CoChat
Sign Up
Cited by 139Fuel Cells and Related MaterialsAdvancements in Solid Oxide Fuel CellsMembrane-based Ion Separation Techniques

Sulfonated Poly(ether ether ketone) Membranes for Direct Methanol Fuel Cells

Open access
Yang, B., Manthiram, A.·2003·Electrochemical and Solid-State Letters
DOI 10.1149/1.1613073
Open this paper in CoChat — free accountOpen PDF

Abstract

Sulfonated poly(ether ether ketone) (SPEEK) with different degrees of sulfonation has been prepared and evaluated as proton exchange membrane electrolytes in direct methanol fuel cells (DMFCs). The membranes have been characterized by ion-exchange capacity, proton conductivity, and liquid uptake measurements. The proton conductivity of the SPEEK membranes increases with increasing sulfonation level, and are lower than that of Nafion. The percent liquid uptake increases with increasing temperature, methanol concentration, and degree of sulfonation. Within a narrow range of sulfonation of the SPEEK membranes exhibit electrochemical performances comparable to or exceeding that of Nafion at 65°C, making it an attractive low-cost alternative to Nafion. The better performance of the SPEEK membranes is due to the suppression of methanol permeability as indicated by a lower methanol crossover current density at the cathode. © 2003 The Electrochemical Society. All rights reserved.

The claims and statistics of this paper haven’t been checked yet.

Run the check — free, no account needed. It reads the open-access text and checks the sources it cites.

A few free checks a day · papers already verified open instantly · results are public

Integrity signals

Registry

Crossref · 10.1149/1.1613073

Cites

22 of 22 references verified0 citation errors · 0 not checkable

Statistics

Claims the paper makes

The claims and statistics of this paper haven’t been checked yet.

Run the check — free, no account needed. It reads the open-access text and checks the sources it cites.

A few free checks a day · papers already verified open instantly · results are public

Claims other papers make about this one

Each is checked against this paper’s own text: does it say what the citing paper says it does?

  • A similar conductivity/methanol crossover correlation has been observed with new polymeric materials, where protonic conductivity decreases as the methanol barrier property of the film improves.

    “A similar conductivity/methanol crossover correlation has been observed with these polymers, where the protonic conductivity decreases as the methanol barrier property of the film improves.”

    From Sulfonated Polyphosphazene-Polybenzimidazole Membranes for DMFCs (2005) · cites this paper as [11]

Self-check

Percentages, sums and reported differences re-computed from the paper’s own numbers.

The self-check needs the paper’s full text.

Cites

Flagged first, then by citations

Research works printed but not linked: 4

  1. [3]3. T. A. Zawodzinski, C. Derouin, S. Radzinski, R. J. Sherman, V. T. Smith, T. E. Springer, and S. Gottesfeld, J. Electrochem. Soc., 140, 1041 ͑1993͒.
  2. [4]4. T. A. Zawodzinski, T. E. Springer, J. Davey, R. Jestel, C. Lopez, J. Valerio, and S. Gottesfeld, J. Electrochem. Soc., 140, 1981 ͑1993͒.
  3. [22]22. X. M. Ren, T. E. Springer, T. A. Zawodzinski, and S. Gottesfeld, J. Electrochem. Soc., 147, 466 ͑2000͒.
  4. [23]23. X. M. Ren, T. E. Springer, and S. Gottesfeld, J. Electrochem. Soc., 147, 92 ͑2000͒.

Cited by

Sorted by citations

Related

Authors
Yang, B., & Manthiram, A.
Affiliations
The University of Texas at Austin (US)
ORCID
Venue
Electrochemical and Solid-State Letters
Publisher
The Electrochemical Society
Published
2003
Volume
6
Issue
11
Pages
A229
ISSN
1099-0062 (ISSN-L)
DOI
10.1149/1.1613073
OpenAlex
W2086305861
Cited by
139
References
22
Citations by year
2025: 1 · 2024: 2 · 2023: 3 · 2021: 2 · 2020: 4 · 2019: 2 · 2018: 5 · 2017: 6 · 2016: 4 · 2015: 3 · 2014: 3 · 2013: 7 · 2012: 8
FWCI
8.69
Type
journal article
Language
en
Open access
Locations
Electrochemical and Solid-State Letters (publishedVersion)
Funders
  • Welch Foundation
  • University of Texas at Austin
  • Office of Naval Research
Topics
  • Physical Sciences › Engineering › Electrical and Electronic Engineering › Fuel Cells and Related Materials
  • Physical Sciences › Materials Science › Materials Chemistry › Advancements in Solid Oxide Fuel Cells
  • Physical Sciences › Engineering › Biomedical Engineering › Membrane-based Ion Separation Techniques
Keywords
sulfonated poly(ether ether ketone), direct methanol fuel cells, proton exchange membranes, degree of sulfonation, proton conductivity, fluid intake, methanol permeability, methanol crossover, Nafion alternative, ion exchange capacity

About these checks

Registry, retraction, Cites and statistics results are computed, not judged, with one exception: a printed reference that no index lists is read once by a model before it counts as a citation error. Claims are extracted by a model and kept only when their quote appears verbatim in the text; each cited source is then checked, with a model’s help, for whether it says what the claim relies on. Those verdicts can be wrong — read the claim’s quote and the cited source before relying on one.

Statistics and arithmetic are recomputed, not judged.

Confidence bands are shown only for fields calibrated on our annotated test set. None is calibrated yet, so no band is shown.

What counts as a claim ›How we measure confidence ›How we check this ›

Are you an author, or do you see a problem with this page? Request a review