Microwave ovens could soon be cooking the next generation of electric vehicle batteries, cutting production time from days to minutes. Researchers are building a microwave flow reactor that churns out kilogrammes per day of nanostructured cathode materials for lithium-ion batteries—particles with precise shapes and crystal structures that conventional heating methods cannot produce. Current manufacturing of these high-performance materials requires multiple energy-intensive steps and often creates defects that ruin battery performance. Microwave processing avoids those side-reactions, improves crystallinity, and uses only the energy and resources actually needed, following circular economy principles. If the reactor works at scale, it could unlock a UK chemical industry opportunity worth £2.7 billion per year by supplying tailored cathodes for next-generation electric vehicles. The project also establishes a general manufacturing platform: the same microwave approach could be adapted to produce other functional inorganic materials—such as textured electrodes for long-life batteries or nanostructured components for high-power applications—that are currently impossible to make affordably at industrial scale.
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Delivery of bespoke, tailored functional materials for specific applications often requires multistep and/or custom manufacturing processes which may not always be transferable. This programme of research brings together experts from across the UK with the goal of designing, developing and deploying sustainable microwave manufacturing processes that deliver bespoke inorganic functional materials not accessible at scale by current manufacturing methods. Microwave processing affords unique control and heating characteristics which, when coupled with judicious reactant choice, can shorten reaction times (from days to minutes), avoid unwanted side-reactions which can lead to unwanted additional products and improve short-range crystallinity by alleviating defect formation. These benefits represent considerable advantanges over traditional methods, where processing can lead to defects which plague performance. Synthesis of state-of-the-art, tailored functional materials currently requires additional resource demands, be they multistep processes or more energy-intensive treatments. Solving the production of such materials represents a key challenge in delivering materials with demanding performance criteria, e.g. nanostructured cathodes for high power density applications or textured electrodes for long cycle life. The unique properties of microwaves offer a greener, faster, and more targeted manufacturing route to achieving high value functional materials. Here, we target the scaled-up (kg/day) synthesis of nanostructured and faceted cathode particles, with the key delivery of (i) a microwave flow reactor producing high quality Li-ion battery cathode materials with primary particle morphologies and performances not accessible by traditional synthetic routes and (ii) a sustainable route to the reduction of manufacturing resource use, to just the amount required, through delivery of resource efficiency, multi-level optimization and circular economy principles. Realising this sustainable microwave manufacturing route to high value energy storage cathodes of immediate interest for next-generation electric vehicle applications has the opportunity to contribute in a significant way to a UK economic chemical industry opportunity worth a potential £2.7B per year.
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