Effects of SO2 on Cathode Performance of Proton Exchange Membrane Fuel Cell

Chem. J. Chinese Universities

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Effects of SO₂ on Cathode Performance of Proton Exchange Membrane Fuel Cell

YANG Dai-Jun^1,2, MA Jian-Xin^1,3*, MA Xiao-Wei³, ZHOU Wei^1,3, XU Lin⁴, WU Min-Zhong⁴, WAN Gang¹

1. Clean Energy Automotive Engineering Center, Tongji University, Shanghai 201804, China;
2. School of Resource & Environmental Engineering, East China University of Science & Technology, Shanghai 200237, China;
3. Institute for Hydrogen Technologies, School for Automotive Studies, Tongji University,
4. Shanghai Fuel Cell Powertrain System Co. Ltd., Shanghai 201804, China

Received:2006-06-09 Revised:1900-01-01 Online:2007-04-10 Published:2007-04-10
Contact: MA Jian-Xin

Abstract

Abstract: SO₂ with volume fractions from 5×10^-8 to 3.2×10^-6 was introduced into the cathode of a single Proton Exchange Membrane Fuel Cell(PEMFC) to investigate the effect of SO₂ on the performance of the PEMFC. Voltage-time(V-t) curve and polarization(V-I) curves show that 5×10^-7 SO₂ can cause significant and irreversible effect on the cell performance, and the performance decay increases with SO₂ volume fraction increasing. Using electrochemical impedance spectroscopy(EIS), it was found that after being poisoned by 5×10^-7 SO₂ for 130 h, the charge transfer resistance(R_ct) was reversible after cathode purging for 20 h and cyclic voltammetry(CV) test, however the surface state of the cathode was permanently changed. A reduction of the electrochemical active surface(EAS) of the cathode, which contributed to the irreversible cell performance decay, was confirmed by cyclic voltammograms.

Key words: Proton exchange membrane fuel cell(PEMFC), Cathode, Sulfur dioxide

CLC Number:

O646
TM911.4

TrendMD:

YANG Dai-Jun^1,2, MA Jian-Xin^1,3*, MA Xiao-Wei³, ZHOU Wei^1,3, XU Lin⁴, WU Min-Zhong⁴, WAN Gang¹. Effects of SO₂ on Cathode Performance of Proton Exchange Membrane Fuel Cell[J]. Chem. J. Chinese Universities, doi: .

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Effects of SO₂ on Cathode Performance of Proton Exchange Membrane Fuel Cell

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