Understanding the SEI of Na-ion batteries
Maria Crespo a
a Queen Mary University of London,School of Engineering and Material Sciences
Materials for Sustainable Development Conference (MATSUS)
Proceedings of MATSUS Fall 2023 Conference (MATSUSFall23)
#EMERBAT - Emerging battery technologies
Torremolinos, Spain, 2023 October 16th - 20th
Organizers: Philipp Adelhelm, Maria Crespo and Guiomar Hernández
Oral, Maria Crespo, presentation 373
DOI: https://doi.org/10.29363/nanoge.matsus.2023.373
Publication date: 18th July 2023

Sodium ion batteries (SIBs) are a potential alternative to diversify the energy landscape, beyond Lithium-ion batteries (LIBs), due to their similar storage mechanism and easy technology transfer. Currently, the benchmark anodes for SIBs are hard carbons (HCs), since sodium ions do not intercalate into graphite. HCs can be produced from a variety of waste precursors and therefore are more sustainable and less geopolitically compromised than natural graphite, mainly concentrated in China. 

The electrochemical degradation of SIBs occurs at a higher rate than in LIBs. This can be attributed to the larger electrochemical reactivity of the HC anodes. A deeper operando understanding of the degradation mechanisms in SIBs, coupled with engineering of the materials and electrolyte to ensure that a better and more protective solid electrolyte interface (SEI) is formed, is needed for an accelerated scale up of this technology. In this talk I will show you some of the strategies we have developed for these aims.

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