Ebrahim Ali's Webpage

Photo of Ebrahim Ali Postgraduate Researcher

Phone: +44 (0)20 7679 2643
Email: e.ali@ucl.ac.uk
Department of Chemical Engineering
University College London
Torrington Place
London WC1E 7JE
United Kingdom

Ebrahim graduated with honours in Chemical Engineering from University College London in 2008 and began his Ph.D. in the same Department in 2008.

Research project

Title: Investigating corrosion and ion leaching from metallic bipolar plates used in Polymer Electrolyte Fuel Cells

Supervisor: Dr Dan Brett

The project aims to deliver a unique insight into the corrosion and ion leaching mechanisms exhibited by bipolar plates used in polymer electrolyte based fuel cells and define methodologies and investigate materials that avoid corrosion.

In-situ electrochemical techniques allied with ex-situ surface analysis will be used to study bipolar plate behaviour in the operational environment of conventional polymer electrolyte fuel cells (PEFCs), direct methanol fuel cells (DMFCs), high temperature PEFCs and alkaline membrane PEFCs.

Polymer electrolyte fuel cells performance is usually considered to have reached the targets required for most applications. The R&D is now shifting to maintaining this performance throughout the operational lifetime of the fuel cell or restricting its degradation to an acceptable level. The source of fuel cell performance degradation originates from various mechanisms and different components of the fuel cell. One of the most important yet understudied, areas is that of the bipolar plate. Due to the need to maximise the power density of PEFCs and lower the cost of construction, metallic bipolar plates are a popular choice for this component, albeit with the disadvantage of metal corrosion. Degradation / corrosion of the bipolar plate have the effect of increasing the contact resistance between it and the electrode, compromising the mechanical integrity of the fuel cell and leaching ion that catalyse the degradation of the electrolyte membrane. This is collectively a major route of fuel cell degradation and failure. Understanding the mechanism of degradation under different operating conditions for various polymer electrolyte fuel cells is essential to the improvement of the PEFCs durability. The project aims to apply advanced diagnostic techniques in order to recognise and understand the various mechanisms of bipolar plate degradation, operating under a broad range of operating conditions

Page last modified on 15 sep 11 09:41