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

Stumper, Benedikt; Mayr, Andreas; Reinhart, Gunther

doi:10.1016/j.procir.2020.05.159

Cited by 11 publications

(12 citation statements)

References 6 publications

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“…Prior to fabricating the AC–CNTs and LIG–CNTs, freestanding CNT sheets of 5 μm thickness are synthesized by using FC–CVD in a vertical tube-type furnace (the thickness of CNT sheets was confirmed through cross-sectional images, as shown in Figure S2); then, AC or graphite-based slurries are coated on CNT sheets. For applying the G–CNTs as anodes of LIHCs, prelithiation proceeds to increase the cell voltage, reduce the potential drop at the onset of polarity switching, and improve the Coulombic efficiency (CE). , Among the prelithiation methods, direct contact with Li metals in the presence of electrolytes is the simplest and most efficient method because Li ions diffuse fast through the interface between the anode and lithium . After lithiation, the color of the G–CNTs changes from gray to gold, corresponding to that of the Li-graphite alloy (Li x C 6 , 0 ≤ x ≤ 1) .…”

Section: Resultsmentioning

confidence: 99%

“…For applying the G− CNTs as anodes of LIHCs, prelithiation proceeds to increase the cell voltage, reduce the potential drop at the onset of polarity switching, and improve the Coulombic efficiency (CE). 27,28 Among the prelithiation methods, direct contact with Li metals in the presence of electrolytes is the simplest and most efficient method because Li ions diffuse fast through the interface between the anode and lithium. 29 After lithiation, the color of the G−CNTs changes from gray to gold, corresponding to that of the Li-graphite alloy (Li x C 6 , 0 ≤ x ≤ 1).…”

Section: ■ Introductionmentioning

confidence: 99%

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Intertwined CNT Assemblies as an All-Around Current Collector for Volume-Efficient Lithium-Ion Hybrid Capacitors

Jun

Paeng

Kim

et al. 2023

ACS Appl. Mater. Interfaces

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The increasing demands for conversion systems for clean energy, wearable devices powered by energy storage systems, and electric vehicles have greatly promoted the development of innovative current collectors to replace conventional metal-based foils, including those in multidimensional forms. In this study, carbon nanotubes (CNTs) with desirable features and ease of processing are used in the preparation of floating catalyst–chemical vapor deposition-derived CNT sheets for potential use as all-around current collectors in two representative energy storage devices: batteries and electrochemical capacitors. Due to their short and multidirectional electron pathways and multimodal porous structures, CNT-based current collectors enhance ion transport kinetics and provide many ion adsorption and desorption sites, which are crucial for improving the performance of batteries and electrochemical capacitors, respectively. By assembling activated carbon–CNT cathodes and prelithiated graphite–CNT anodes, high-performance lithium-ion hybrid capacitors (LIHCs) are successfully demonstrated. Briefly, CNT-based LIHCs exhibit 170% larger volumetric capacities, 24% faster rate capabilities, and 21% enhanced cycling stabilities relative to LIHCs based on conventional metallic current collectors. Therefore, CNT-based current collectors are the most promising candidates for replacing currently used metallic materials and provide a valuable opportunity to possibly redefine the roles of current collectors.

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Section: Resultsmentioning

confidence: 99%

Section: ■ Introductionmentioning

confidence: 99%

Intertwined CNT Assemblies as an All-Around Current Collector for Volume-Efficient Lithium-Ion Hybrid Capacitors

Jun

Paeng

Kim

et al. 2023

ACS Appl. Mater. Interfaces

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“…[ 15 ] Prelithiation can be performed using different approaches, including chemical, electrochemical, and additive‐based prelithiation, as well as direct contact prelithiation. [ 18 ]…”

Section: Introductionmentioning

confidence: 99%

“…Direct contact prelithiation using lithium foil is considered a promising method due to its flexible application, compatibility with common electrode materials, scalability, and cost efficiency. [ 18,19 ]…”

Section: Introductionmentioning

confidence: 99%

“…To ensure uniform coverage of the anode surface with lithium foil without applying too much lithium, it is required to use a very thin lithium foil, typically less than 20 μm in thickness. [ 18 ] The specific thickness required varies depending on the type of anode material used. Additionally, achieving accurate prelithiation depends not only on using the thinnest possible lithium foil but also on selecting the appropriate foil thickness tailored to the specific anode material.…”

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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Lithium Batteries – Lithium Secondary Batteries – Li-ion Battery | Negative Electrode: Pre-Lithination

Profanter,

Stolz,

Winter

et al. 2025

Encyclopedia of Electrochemical Power Sources

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

Cited by 11 publications

References 6 publications

Intertwined CNT Assemblies as an All-Around Current Collector for Volume-Efficient Lithium-Ion Hybrid Capacitors

Intertwined CNT Assemblies as an All-Around Current Collector for Volume-Efficient Lithium-Ion Hybrid Capacitors

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

Lithium Batteries – Lithium Secondary Batteries – Li-ion Battery | Negative Electrode: Pre-Lithination

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