Delivering Enhanced Electrode Performance through Processing and Design

Jaguar Land Rover EPSRC ICASE 2022

4 year PhD with enhanced stipend

Whilst there has been much innovation in terms of materials development for novel battery chemistries and great advances in terms of understanding of degradation in the University sector, there has been limited activity in optimising the electrode microstructure. Li-ion battery cells are generally manufactured via roll to roll technology including methods such as calendaring, doctor blading, screen printing etc.  Electrodes are coated onto a metal current collector foil in a composite structure comprised of active material, binders, and conductive additives which requires careful control of colloid chemistry, adhesion, and solidification. The electrochemically inactive additive materials reduce energy density but are needed to allow mechanical integrity and current distribution. The degree of porosity and compaction in the electrode can impede or enhance battery performance.

Here we propose a radical new approach, redesigning and rebuilding the electrode structure from carefully chosen components to form new highly functional nanocomposite structures. This will afford many advantages, but is best done in a manner that can readily be translated to existing low cost production lines.  The advantages include: (i) higher energy density per unit area of cell through enabling thicker electrodes which still deliver the required power and charging characteristics, (ii) enhanced power capability from better connectivity within the electrode, (iii) enhanced durability.

Further information and informal enquiries may be directed to Professor John Irvine, email: [email protected]