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project . 2017 - 2021 . Closed

ICSF Wave 1: GENESIS: Garnet Electrolytes for New Energy Storage Integrated Solutions

UK Research and Innovation
Funder: UK Research and InnovationProject code: EP/R024006/1
Funded under: EPSRC Funder Contribution: 754,394 GBP
Status: Closed
30 Sep 2017 (Started) 28 Feb 2021 (Ended)

The portable electronics boom has been driven by advances made in Li ion battery technology, following the initial work on the lithium cobalt oxide cathode material by Goodenough and co-workers. Other notable advances in terms of phosphate containing cathodes have extended the applications of lithium ion batteries to higher charge/discharge rate applications such as power tools and transport. Applications in terms of the latter have intensified the already substantial interest in lithium ion batteries, as a result of the environmental benefits of hybrid and all electric cars. Further applications as energy storage for renewable sources have also been proposed to overcome the intermittency of supply problems of renewable energy sources such as solar or wind power. While research on new lithium ion battery electrode materials has been intensive, the development of new electrolyte materials has received comparatively less attention. In a typical Li ion battery, the electrolyte is usually a Li salt in an organic solvent, as a result of the high Li ion conductivity of such systems. The flammable, toxic and volatile nature of such electrolytes, the instability in conjunction with higher voltage electrode materials, and the desire for miniaturisation are placing distinct limitations on further advances with conventional liquid electrolyte batteries. The use of a solid state electrolyte allows the potential to overcome these problems along with supplying a range of other advances including the simplified production of high voltage battery packs. A further unique advantage of solid state batteries is their low leakage currents, which delivers other potential applications in terms of use in energy harvesting devices. Furthermore the desire for shape-flexible, wearable electronic devices offers another avenue for the exploitation of all solid state battery systems. This interdisciplinary project involving researchers from chemistry, materials science, chemical engineering and industry aims therefore to develop new Solid State Li ion batteries. Such all solid state cells have been identified as one of the most important future targets in battery research, as illustrated by their inclusion as one of the fast-track projects in the Faraday challenge (industry strategy challenge objective 2). The importance of these batteries lies in their potential to deliver improved safety, reduced size, and higher capacity, as well as to open up new applications such as energy harvesting devices. In particular, the demonstration of a commercially viable scaleable ceramic-based electrolyte with higher safety will offer large benefits in terms of UK wealth generation/investment opportunities (Industry strategy challenge objective 1). In terms of potential commercialisation, the optimisation of garnet Li ion conducting electrolytes, their scale-up synthesis and demonstration in all solid state batteries offers significant potential in terms of Li ion battery technology, with applications ranging from portable consumer devices to transport. In terms of helping to ensure the delivery of impact in this area, a strong link has already been set up with industry, to provide key input into the project from an industrial viewpoint, along with industrial validation of the full cell tests on the most promising systems (industrial strategy challenge objective 3). This will allow UK industry to capitalise on the developments made during this work and offer an early route to exploitation (Industry strategy challenge objective 1).

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