Study of temperature, air dew point temperature and reactant flow effects on proton exchange membrane fuel cell performances using electrochemical spectroscopy and voltammetry techniques

JOURNAL OF POWER SOURCES

卷:195

Article

Wasterlain, S.^1,2  Candusso, D.^1,3  Hissel, D.^1,2  Harel, F.^1,3  Bergman, P.⁴  Menard, P.⁴  Anwar, M.⁴ 

[1] FC LAB, F-90010 Belfort, France

[2] Univ Franche Comte, ENISYS Dept, CNRS, FEMTO ST,UMR 6174, F-90010 Belfort, France

[3] French Natl Inst Transport & Safety Res, INRETS, F-90010 Belfort, France

[4] Univ Connecticut, Connecticut Global Fuel Cell Ctr, Dept Elect & Comp Engn, Storrs, CT 06269 USA

关键词: PEMFC;    Characterization;    Electrochemical impedance spectroscopy;    Cyclic voltammetry;    Linear sweep voltammetry;   

DOI  :  10.1016/j.jpowsour.2009.08.084

来源: Elsevier

【 摘 要 】

A single PEMFC has been operated by varying the assembly temperature, the air dew point temperature and the anode/cathode stoichiometry rates with the aim to identify the parameters and combinations of factors affecting the cell performance. Some of the experiments were conducted with low humidified reactants (relative humidity of 12%). The FC characterizations tests have been conducted using in situ electrochemical methods based on load current and cell voltage signal analysis, namely: polarization curves, EIS measurements, cyclic and linear sweep voltammetries (CV and LSV). The impacts of the parameters on the global FC performances were observed using the polarization curves whereas EIS, CV and LSV test results were used to discriminate the different voltage loss sources. The test results suggest that some parameter sets allow maximal output voltages but can also induce material degradation. For instance, higher FC temperature and air flow values can induce significant electrical efficiency benefits, notably by increasing the reversible potential and the reaction kinetics. However, raising the cell temperature can also gradually dry the FC and increase the risk of membrane failure. LSV has also shown that elevated FC temperature and relative humidity can also accelerate the electrolyte degradation (i.e. slightly higher fuel crossover rate) and reduce the lifetime consequently. (C) 2009 Elsevier B.V. All rights reserved.

【 授权许可】

Free