Unended Quest: A collaboration between BeDimensional and a few research and academic institutions to push forward graphene in the Li-ion battery market.

Synthesis of Layered Silicon-Graphene Hetero-structures by Wet Jet Milling for High Capacity Anodes in Li-ion Batteries.

The team: Romeo Malik,1 Qianye Huang,1 Laura Silvestri,2,3 Danqing Liu,1 Vittorio Pellegrini,3,4 Luigi

18 Marasco,3 Eleonora Venezia,3 Sara Abouali,3 Francesco Bonaccorso,3,4 Michael J. Lain,1 David1

Greenwood,1 Geoff West,1 Paul R. Shearing,5 and Melanie J. Loveridge*

1 WMG, University of Warwick, Coventry, UK.

2 Dipartimento di Tecnologie Energetiche, ENEA C.R Casaccia, Roma, Italy

3 Graphene Labs Istituto Italiano di Tecnologia, Genova, Italy

4 Bedimensional Spa, Genova, Italy

5 Department of Chemical Engineering, The Electrochemical Innovation Lab, University College London, London, UK

Abstract. While silicon-based negative electrode materials for high capacity lithium-ion batteries have been extensively studied, the implementation of a large-scale material production method that can be easily transferred to industry, remains a crucial challenge. Here, a scalable wet-jet milling method was developed to prepare a silicon-graphene hybrid material to be used as negative electrode in lithium-ion batteries. The excellent performance of the hybrid material along with the scalability of the synthesizing process is a step forward to realize high capacity/energy density lithium-ion batteries for multiple device applications.

Acknowledgements

This project has received funding from the European Union’s Horizon 2020 research and innovation program under the grant agreement No. 696656 – GrapheneCore2. The authors also acknowledge the ISCF Faraday Challenge project “Towards a Comprehensive Understanding of Degradation Processes in EV Batteries” for funding under EP/S003053/1

Keywords: Lithium-ion batteries, Silicon, graphene, wet-jet milling, FIB-SEM tomography, high-energy-density electrodes.