Abstract
Composite polymer membranes are prepared by embedding layered silicates such as Laponite and Montmorillonite (MMT) into sulfonated poly(ether ehter ketone) (sPEEK) membranes for fuel-cell applications. Sulfonation of the polymer increased membrane hydrophilicity to give good proton conductivity. Layered silicates incorporated into polymer membranes help to reduce swelling significantly in hot water; they also help to decrease methanol permeability. These polymer/clay composite membranes show thermal stability to 240°C and (3-3.5) × 10-3 Scm-1 proton conductivity at room temperature. In addition, methanol cross-over is reduced without a serious reduction in the proton conductivity. In a single-cell test using hydrogen and oxygen, the prepared membranes give current densities that are between 70 and 80% of those with Nafion 115 membranes. As a result, for polymer electrolytes, sPEEK/clay composite membranes offer a low-cost alternative to perfluorinated membranes.
| Original language | English |
|---|---|
| Pages (from-to) | 18-25 |
| Number of pages | 8 |
| Journal | Journal of Power Sources |
| Volume | 124 |
| Issue number | 1 |
| DOIs | |
| Publication status | Published - 2003 Oct 1 |
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All Science Journal Classification (ASJC) codes
- Renewable Energy, Sustainability and the Environment
- Energy Engineering and Power Technology
- Physical and Theoretical Chemistry
- Electrical and Electronic Engineering
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Proton-conducting composite membranes derived from sulfonated hydrocarbon and inorganic materials. / Chang, Jae Hyuk; Park, Jong Hyeok; Park, Gu Gon; Kim, Chang Soo; Park, O. Ok.
In: Journal of Power Sources, Vol. 124, No. 1, 01.10.2003, p. 18-25.Research output: Contribution to journal › Article
TY - JOUR
T1 - Proton-conducting composite membranes derived from sulfonated hydrocarbon and inorganic materials
AU - Chang, Jae Hyuk
AU - Park, Jong Hyeok
AU - Park, Gu Gon
AU - Kim, Chang Soo
AU - Park, O. Ok
PY - 2003/10/1
Y1 - 2003/10/1
N2 - Composite polymer membranes are prepared by embedding layered silicates such as Laponite and Montmorillonite (MMT) into sulfonated poly(ether ehter ketone) (sPEEK) membranes for fuel-cell applications. Sulfonation of the polymer increased membrane hydrophilicity to give good proton conductivity. Layered silicates incorporated into polymer membranes help to reduce swelling significantly in hot water; they also help to decrease methanol permeability. These polymer/clay composite membranes show thermal stability to 240°C and (3-3.5) × 10-3 Scm-1 proton conductivity at room temperature. In addition, methanol cross-over is reduced without a serious reduction in the proton conductivity. In a single-cell test using hydrogen and oxygen, the prepared membranes give current densities that are between 70 and 80% of those with Nafion 115 membranes. As a result, for polymer electrolytes, sPEEK/clay composite membranes offer a low-cost alternative to perfluorinated membranes.
AB - Composite polymer membranes are prepared by embedding layered silicates such as Laponite and Montmorillonite (MMT) into sulfonated poly(ether ehter ketone) (sPEEK) membranes for fuel-cell applications. Sulfonation of the polymer increased membrane hydrophilicity to give good proton conductivity. Layered silicates incorporated into polymer membranes help to reduce swelling significantly in hot water; they also help to decrease methanol permeability. These polymer/clay composite membranes show thermal stability to 240°C and (3-3.5) × 10-3 Scm-1 proton conductivity at room temperature. In addition, methanol cross-over is reduced without a serious reduction in the proton conductivity. In a single-cell test using hydrogen and oxygen, the prepared membranes give current densities that are between 70 and 80% of those with Nafion 115 membranes. As a result, for polymer electrolytes, sPEEK/clay composite membranes offer a low-cost alternative to perfluorinated membranes.
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U2 - 10.1016/S0378-7753(03)00605-0
DO - 10.1016/S0378-7753(03)00605-0
M3 - Article
AN - SCOPUS:0042330050
VL - 124
SP - 18
EP - 25
JO - Journal of Power Sources
JF - Journal of Power Sources
SN - 0378-7753
IS - 1
ER -