Professor Fletcher has a long and distinguished track record in scientific research. He is an international expert in battery and fuel cell technology, and has worked with several multinational companies (Schlumberger, Morgan Carbon, National Power) and the US and UK military (DSTL, QinetiQ, DARPA) on the development of carbon-based batteries and supercapacitors. He is on the editorial board of Electrochemistry Communications, The Journal of Power Sources, and the Journal of Solid State Electrochemistry. He is also Chair of Physical Chemistry at Loughborough University, and a winner of the Stokes Medal of the Royal Australian Chemical Institute. He has published more than 100 papers and been awarded 3 patents.

Within the ELEVATE project, Professor Fletcher is leading the theoretical modelling and practical design of carbon-based supercapacitors. Supercapacitors are an emerging technology with numerous applications in pulse power, motive power, and energy storage. However, their carbon electrodes show a variety of non-ideal behaviours that have so far eluded explanation. These include Voltage Decay after charging and Voltage Rebound after discharging. Recent work by the Fletcher group has explained these phenomena in terms of the microstructure of the carbon. The results confirm that wide distributions of RC time constants exist inside real supercapacitors.