Modeling of the Lithium Calendering Process for Direct Contact Prelithiation of Lithium-Ion Batteries

Stumper, Benedikt; Dhom, Jonas; Schlosser, Lukas; Schreiner, David; Mayr, Andreas; Daub, Rüdiger

doi:10.1016/j.procir.2022.05.096

Cited by 9 publications

(20 citation statements)

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“…In the context of the publication, the validation was successfully carried out for the initial foil thickness h 0 ¼ 50 μm, similar to Stumper et al, [24] which leads to the confirmation that the modified model is also valid.…”

Section: Modeling Of the Lithium Calendering Processmentioning

confidence: 56%

“…Schematic structure of the process model for the calendering of lithium foil with the considered process parameters and geometric variables of the lithium foil. [24] thickness of the lithium foil after calendering ĥ1 . The prediction is only valid in the factor space considered, which is outlined in green in Figure 2a.…”

Section: Modeling Of the Lithium Calendering Processmentioning

confidence: 99%

“…The increase in voltage indicates a progressive prelithiation of the anode due to the continuous deposition of lithium in the anode active material. [30] A detailed explanation and discussion of the OCV measurements for the same anode material have already been performed in a previous publication. [30] The green curve of the pouch cells prelithiated by calendering achieves a flatter course and a lower maximum voltage.…”

Section: Application Of Lithium Foil Via Calendering For Direct Conta...mentioning

confidence: 99%

“…For its realization and later utilization for direct contact prelithiation of LIB electrodes, a profound process comprehension and understanding of the deformation behavior of lithium during calendering is necessary. [24] For this reason, the present work deals with the experimental investigation of the deformation of lithium foils by calendering and the model-based description of the deformation behavior. For this purpose, experimental data are generated using a systematic design of experiments.…”

Section: Introductionmentioning

confidence: 99%

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Experimental Investigation of the Lithium Calendering Process for Direct Contact Prelithiation of Lithium‐Ion Batteries

Stumper,

Dhom,

Schlosser

et al. 2023

Energy Tech

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Lithium‐ion batteries suffer from high initial capacity losses during formation. One possible approach to compensate for these initial capacity losses is prelithiation, which is the addition of lithium into the battery cell before formation. A promising method is direct contact prelithiation using lithium foil, which requires lithium foil thicknesses below 10 μm to ensure the safe and accurate performance of the prelithiation process. However, free‐standing lithium foils are only commercially available down to a thickness of 20 μm; hence, in this present work, the calendering process of lithium is investigated in detail. An already developed process model will be adapted to provide detailed information on the deformation properties and thickness reduction of different lithium foil thicknesses. A design of experiments is used to investigate the influences of lithium foil geometry, line load, web speed, and roller temperature on the deformation behavior of lithium during calendering. Lithium foil is applied onto anodes by calendering, which are electrochemically investigated using pouch cells. The cells prelithiated by calendering show improved electrochemical performance compared to the manually prelithiated cells, increasing cycle life by 19%.

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Section: Modeling Of the Lithium Calendering Processmentioning

confidence: 56%

Section: Modeling Of the Lithium Calendering Processmentioning

confidence: 99%

Section: Application Of Lithium Foil Via Calendering For Direct Conta...mentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Experimental Investigation of the Lithium Calendering Process for Direct Contact Prelithiation of Lithium‐Ion Batteries

Stumper,

Dhom,

Schlosser

et al. 2023

Energy Tech

Self Cite

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show abstract

“…[86] Compared to the extrusion process, the rolling process is more costly, and the number of rolling steps increases the cost of the process. [87] To minimize this, Stumper et al [88] studied the effect of the lithium foil geometries, line load, and roller temperature on the deformation behavior of the lithium foil to stablish a semiempirical model to predict the lithium processing and validity ranges. Unfortunately, the densification toward 0% has still not been solved by the industry.…”

Section: Rollingmentioning

confidence: 99%

Current Status and Future Perspective on Lithium Metal Anode Production Methods

Acebedo

Morant‐Miñana

Gonzalo

et al. 2023

Advanced Energy Materials

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Lithium metal batteries (LMBs) are one of the most promising energy storage technologies that would overcome the limitations of current Li‐ion batteries, based on their low density (0.534 g cm−3), low reduction potential (−3.04 V vs Standard Hydrogen Electrode) as well as their high theoretical capacities (3860 mAh g−1 and 2061 mAh cm−3). The overall cell mass and volume would be reduced while both gravimetric and volumetric energy densities would be greatly improved. Their electrochemical performance, however, is hampered by the low efficiency at high current densities and continuous degradation, which are related, among other factors, to the properties of the lithium metal anode (LMA). Hence, the production and processing of LMAs is crucial to obtain the desired properties that would enable LMBs. Here, the conventional method used for the production of LMAs, which is the combination of extraction, electrowinning, extrusion, and rolling processes, is reviewed. Then, the advances in the different alternative methods that can be used to produce and improve the properties of LMAs are described, which are divided into vapor phase, liquid phase, and electrodeposition. Within this last method, the anode‐less concept, for which different approaches to the development of advanced current collectors are illustrated, is included.

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Surface Reconditioning of Lithium Metal Electrodes by Laser Treatment for the Industrial Production of Enhanced Lithium Metal Batteries

Kriegler,

Ballmes,

Dib

et al. 2024

Adv Funct Materials

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Incorporating lithium metal anodes in next‐generation batteries promises enhanced energy densities. However, lithium's reactivity results in the formation of a native surface film, affecting battery performance. Therefore, precisely controlling the chemical and morphological surface condition of lithium metal anodes is imperative for producing high‐performance lithium metal batteries. This study demonstrates the efficacy of laser treatment for removing superficial contaminants from lithium metal substrates. To this end, picosecond‐pulsed laser radiation is proposed for modifying the surface of lithium metal substrates. Scanning electron microscopy (SEM) revealed that different laser process regimes can be exploited to achieve a wide spectrum of surface morphologies. Energy‐dispersive X‐ray spectroscopy (EDX) confirmed substantial reductions of ≈80% in oxidic and carbonaceous surface species. The contamination layer removal translated into interfacial resistance reductions of 35% and 44% when testing laser‐cleaned lithium metal anodes in symmetric all‐solid‐state batteries (ASSBs) with lithium phosphorus sulfur chloride (LPSCl) and lithium lanthanum zirconium oxide (LLZO) solid electrolytes, respectively. Finally, a framework for integrating laser cleaning into industrial battery production is suggested, evidencing the industrial feasibility of the approach. In summary, this work advances the understanding of lithium metal surface treatments and serves as proof of principle for its industrial applicability.

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Modeling of the Lithium Calendering Process for Direct Contact Prelithiation of Lithium-Ion Batteries

Cited by 9 publications

References 1 publication

Experimental Investigation of the Lithium Calendering Process for Direct Contact Prelithiation of Lithium‐Ion Batteries

Experimental Investigation of the Lithium Calendering Process for Direct Contact Prelithiation of Lithium‐Ion Batteries

Current Status and Future Perspective on Lithium Metal Anode Production Methods

Surface Reconditioning of Lithium Metal Electrodes by Laser Treatment for the Industrial Production of Enhanced Lithium Metal Batteries

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