The successful implementation of an alkali metal negative electrode and the replacement of the flammable organic liquid electrolytes, currently used in Li-ion batteries, with a solid would increase the range of batteries, making them lighter and addressing safety concerns. Current efforts to commercialise such batteries worldwide are failing and will continue to fail until we understand the fundamental processes taking place in these devices. The ambition of the SOLBAT project is to understand the key chemical and fabrication challenges that would be inherent in the integration of batteries with a chemistry beyond Li-ion. We have identified the four major barriers facing all-solid-state batteries where a lack of fundamental understanding is blocking progress.
They are reflected in the four work packages (WP) of our programme:
• WP1: Plating and stripping Li or Na at the alkali metal anode||solid electrolyte interface.
• WP2: Ceramic-ceramic contact at the solid electrolyte||cathode interface.
• WP3: Discovery of new solid electrolytes.
• WP4: Integration of solid state electrolytes in full cell architectures.
Through fundamental knowledge being developed project partners will have a competitive edge in making informed decisions and providing a new generation of top notch battery scientists. Along the way, new intellectual property will be developed and ideally converted into viable businesses by industrial partners and/or newly created start-ups. Ultimately, a serious, long-term effort in developing a strong and substantial core knowledge will result in either the development of the battery chemistry of the future or will inform the viability of a solid-state battery on a commercial, scalable level.
The University of Oxford leads this effort with five other university partners (University of Liverpool, University of Cambridge, University College London, University of Sheffield and the University of St. Andrews) and six industrial partners. Professor Peter Bruce is the Principal Investigator for SOLBAT.
2020 Roadmap on Solid-state Batteries, Mauro Pasta et al., J Phys Energy, August 2020, DOI:10.1088/2515-7655/ab95f4