Publication on Prelithiation process development

Application of Thin Lithium Foil for Direct Contact Prelithiation of Anodes within Lithium-Ion Battery Production.
The publication by Stumper et al. is available in the Procedia CIRP, Volume 93.

Application of Thin Lithium Foil for Direct Contact Prelithiation of Anodes within Lithium-Ion Battery Production

The publication by Stumper et al. is available in the Procedia CIRP, Volume 93.

Abstract

The rapid advancement and complex requirements of the automotive and energy storage industries require lithium-ion batteries with improved energy density and cycle life. The addition of lithium during lithium-ion battery production, known as prelithiation, has been shown to significantly improve these two performance indicators.

This paper addresses the challenges of understanding the novel technology of prelithiation and its integration into industrial battery cell production. Different prelithiation processes are analyzed and evaluated. The requirements for a series-capable process are derived and result in a suitable process design for the prelithiation of anodes within the lithium-ion battery production.

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SPIDER at the Si-Drive workshop

The SPIDER project was presented at the Si-DRIVE workshop on June 10th, 2020 by Iratxe de Meatza (Cidetec).
The first workshop organised by the European research project Si-DRIVE was held online on June 10th, 2020. It aimed at gathering speakers from H2020 research projects around the issue of sustainability in batteries.

The SPIDER project was presented at the Si-DRIVE workshop on June 10th, 2020 by Iratxe de Meatza (Cidetec).

Figure 1: SPIDER presentation at the SI-DRIVE workshop

The first workshop organised by the European research project Si-DRIVE was held online on June 10th, 2020. It aimed at gathering speakers from H2020 research projects around the issue of sustainability in batteries. Iratxe de Meatza (Cidetec) represented the SPIDER project at the workshop. She made a presentation of the project, with highlights on the development of the separate components of the SPIDER battery (cathode, anode) as well as on second-life applications and on the recycling process.

Si-DRIVE is a H2020 project working on the development of “the next generation of Li-ion batteries”, “to tackle the major barriers to electric vehicle uptake”. Common partners between the SPIDER and the Si-DRIVE projects are Centro Ricerche Fiat and Cidetec. Learn more about the Si-Drive project at http://sidrive2020.eu/

For more information about this presentation, please contact us at contact@project-spider.eu

Figure 2: Program of the Si-DRIVE workshop on June 10th, 2020


Ethylene carbonate-free electrolytes for Li-ion battery: Study of the solid electrolyte interphases formed on graphite anodes

The publication by Ehteshami et al. is available in the Journal of Power Sources, Volume 451.

Niloofar Ehteshami, Lukas Ibing, Lukas Stolz, Martin Winter, Elie Paillard, Ethylene carbonate-free electrolytes for Li-ion battery: Study of the solid electrolyte interphases formed on graphite anodes, Journal of Power Sources, Volume 451, 2020, 227804, ISSN 0378-7753, https://doi.org/10.1016/j.jpowsour.2020.227804.

The publication by Ehteshami et al. is available in the Journal of Power Sources, Volume 451.

Abstract

We investigated the Solid Electrolyte Interphase (SEI) formed onto graphite using adiponitrile/dimethyl carbonate-based electrolytes with either lithium difluoro(oxalato)borate (LiDFOB) or lithium bis(fluorosulfonyl)imide (LiFSI), with or without fluoroethylene carbonate (FEC) as SEI-forming additive, by a combination of X-ray photoelectron spectroscopy, electrochemical impedance spectroscopy and scanning electron microscopy. Without FEC, LiDFOB leads to a more protective SEI layer than LiFSI. FEC leads to improvements in both cases and, in combination with LiDFOB, allows forming an SEI richer in LiF with an overall impedance lower than without FEC. It also prevents the dissolution of the SEI upon cycling. For the graphite electrodes cycled with the LiFSI electrolytes, the interface is greatly influenced by the presence of FEC. Nevertheless, with or without FEC, the SEI layer thicknesses decreases upon cycling. In presence of FEC though, this effect is mitigated, but localized exfoliation of graphite was observed after 50 cycles.

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