Skip to Main content Skip to Navigation
Theses

OPTIMISATION DES PROPRIETES DE CONDUCTION ELECTRIQUE ET DE PASSIVITE D'ACIERS INOXYDABLES POUR LA REALISATION DE PLAQUES BIPOLAIRES DE PILE A COMBUSTIBLE DE TYPE PEMFC

Abstract : Among the new technologies for energy for sustainable development, PEM fuel cells offer seducing aspects. However, in order to make this technology fit large scale application requirements, it has to comply with stringent cost, performance, and durability criteria. In such a frame, the goal of this PhD was to optimize electrical conduction properties and passivity of stainless steels for the conception of PEMFC bipolar plates, used instead of graphite, the reference material.
This work presents the possible ways of performance loss when using stainless steels and some methods to solve this problem. Passive film properties were studied, as well as their modifications by low cost industrial surface treatments, without deposition.
Ex situ characterizations of corrosion resistance and electrical conduction were performed. Electrochemical impedance spectroscopy, water analysis, surface analysis by microscopy and photoelectron spectroscopy allowed to study the impact of ageing on two alloys in different states, and several conditions representative of an exposure to PEMFC media. Correlations between semiconductivity properties, composition, and structure of passive layers were considered, but not leading to clear identification of all parameters responsible for electrical conduction and passivity.
The plate industrial state is not convenient for direct use in fuel cell to comply with durability and performance requirements. A surface modification studied improves widely electrical conduction at initial state. The performance is degraded with ageing, but maintaining a level higher than the initial industrial state. This treatment increases also corrosion resistance, particularly on the anode side.
Document type :
Theses
Complete list of metadatas

https://tel.archives-ouvertes.fr/tel-00199010
Contributor : Johan Andre <>
Submitted on : Tuesday, December 18, 2007 - 11:48:57 AM
Last modification on : Friday, September 11, 2015 - 9:52:09 AM
Long-term archiving on: : Thursday, September 27, 2012 - 11:45:35 AM

Identifiers

  • HAL Id : tel-00199010, version 1

Collections

CEA

Citation

Johan Andre. OPTIMISATION DES PROPRIETES DE CONDUCTION ELECTRIQUE ET DE PASSIVITE D'ACIERS INOXYDABLES POUR LA REALISATION DE PLAQUES BIPOLAIRES DE PILE A COMBUSTIBLE DE TYPE PEMFC. Matériaux. Institut National Polytechnique de Grenoble - INPG, 2007. Français. ⟨tel-00199010⟩

Share

Metrics

Record views

1661

Files downloads

1334