Publications by Kathryn Ellen Toghill

All-Vanadium Dual Circuit Redox Flow Battery for Renewable Hydrogen Generation and Desulfurisation

Hubert Girault, Frédéric Gumy, Véronique Amstutz, Heron Vrubel, Joana Morgado, Pekka Eero Peljo, Kathryn Ellen Toghill, Christopher Raymond Dennison, Justine Nadine Liliane Pandard

An all-vanadium dual circuit redox flow battery is an electrochemical energy storage system capable to function as a conventional battery, but also to produce hydrogen and perform desulfurization when surplus of electricity is available by chemical dischar ...

Royal Society of Chemistry2016

Macroscopic indicators of fault diagnosis and ageing in electrochemical double layer capacitors

Hubert Girault, Mario Paolone, Véronique Amstutz, Kathryn Ellen Toghill, Dimitri Torregrossa

The ageing behaviour of electric double layer (EDLC) supercapacitors during over-temperature and over-voltage stresses is described. Specific experimental tests were carried out in order to reproduce, under laboratory controlled conditions, the above-menti ...

2015

Role of electrolytes in vanadium-cerium flow batteries

Hubert Girault, Véronique Amstutz, Pekka Eero Peljo, Kathryn Ellen Toghill

Amer Chemical Soc2014

Electrochemistry in Supercritical Fluids: A Mini Review

Patrick Voyame, Manuel Alejandro Méndez Agudelo, Kathryn Ellen Toghill

A brief overview of the literature relating to electrochemical studies and processes undertaken in supercritical fluids is presented. This review mostly concerns carbon dioxide and hydrofluorocarbons, given the accessibility of their supercritical states, ...

Elsevier2014

Renewable hydrogen generation from a dual-circuit redox flow battery

Christos Comninellis, Hubert Girault, Xile Hu, Véronique Amstutz, Heron Vrubel, Kathryn Ellen Toghill, Francis Powlesland

Redox flow batteries (RFBs) are particularly well suited for storing the intermittent excess supply of renewable electricity; so-called “junk” electricity. Conventional RFBs are charged and discharged electrochemically, with electricity stored as chemical ...

Royal Soc Chemistry2014

Understanding the Ageing Process, Recovering Phase and Fault Diagnosis of Electrochemical Double Layer Capacitors

Hubert Girault, Mario Paolone, Kathryn Ellen Toghill, Dimitri Torregrossa

This paper focuses on the description of the behavior of supercapacitors during over-temperature and over-voltage stresses and the consequent ageing processes. Specific physical evidences supporting the explanation of the experimental findings are provided ...

IEEE2014

Photoreduction of CO2 Using [Ru(bpy)2(CO)L]n+ Catalysts in Biphasic Solution/Supercritical CO2 Systems

Hubert Girault, Patrick Voyame, Manuel Alejandro Méndez Agudelo, Kathryn Ellen Toghill

The photosensitized reduction of carbon dioxide by the molecular catalyst [Ru(bpy)2(CO)L] is studied in a biphasic liquid-condensed gas system. Increasing pressure is shown to enhance the initial production rate and turnover number of the catalyst before d ...

Amer Chemical Soc2013

REDOX FLOW BATTERY FOR HYDROGEN GENERATION

Christos Comninellis, Hubert Girault, Véronique Amstutz, Kathryn Ellen Toghill

The present invention combines the storage capacity of redox flow batteries and the production of hydrogen and other products of chemical redox reactions. The redox couple of each electrolyte is chemically regenerated on a specific catalyst bed 11, replaci ...

2013

Steady-state macroscale voltammetry in a supercritical carbon dioxide medium

Hubert Girault, Patrick Voyame, Astrid Johana Olaya Avendano, Dmitry Momotenko, Kathryn Ellen Toghill

The electrochemical oxidation and reduction of decamethylferrocene is demonstrated in supercritical carbon dioxide at a macro gold disc electrode at 100 bar and 313 K. Fast mass transport effects were exhibited and the corresponding steady-state voltammetr ...

Royal Soc Chemistry2013