Delaying the onset of coulombic efficiency loss by adjusting the composite cathode processing parameters

Morant‐Miñana, Maria C.; Fernandez-Diaz, L.; Liendo, Guillermo; Blanco, J.; Martín-Fuentes, Silvia; Armand, Michel; Otaegui, Laida; Villaverde, Aitor

doi:10.1016/j.jpowsour.2022.232372

Cited by 5 publications

(3 citation statements)

References 19 publications

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“…Mechanical roll‐knife slitting, which is the established process for LIBs, is not suitable, due to the adhesive properties of Li. Lithium metal foils are finally stacked together with polymer, [ 96,97 ] gels, [ 98 ] and polymer composite [ 99 ] electrolytes at lab and industrial level. [ 100 ]…”

Section: Production Of Lithium Metal Anodesmentioning

confidence: 99%

“…Mechanical roll-knife slitting, which is the established process for LIBs, is not suitable, due to the adhesive properties of Li. Lithium metal foils are finally stacked together with polymer, [96,97] gels, [98] and polymer composite [99] electrolytes at lab and industrial level. [100] Despite being a well stablished industrial process developed for long time, lithium films commercially available do not meet the requirements of quality, length, width, and thicknesses required for the assembly of LMBs at competitive costs.…”

Section: Rollingmentioning

confidence: 99%

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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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Section: Production Of Lithium Metal Anodesmentioning

confidence: 99%

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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“…However, it is of high importance to control and analyse the velocity-time parameters. Conductive carbons are normally on the size of nanometres and agglomerates of the same size could be generated [30]. However, if high-speed and during more than the necessary time is applied to that dispersion, these small agglomerates can be disintegrated into small aggregates or primary particles, and later, owing to their cohesive forces, re-agglomerate in even higher clusters [31].…”

Section: Slurry Processing: Hc and Ac-li 2 C 4 Omentioning

confidence: 99%

Roll-to-roll double side electrode processing for the development of pre-lithiated 80 F lithium-ion capacitor prototypes

Arnaiz,

Canal-Rodríguez,

Martin-Fuentes

et al. 2023

J. Phys. Energy

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Lithium-ion capacitors (LICs) show promise to help lithium-ion batteries (LIBs) and electrical double layer capacitors (EDLCs) in giving response to those applications that require an energy storage solution. However, pre-lithiation is a major challenge that needs to be tackled in order to develop efficient and long-lasting LIBs and LICs. In this work, we report for the first time the scale-up and utilization of sacrificial salts (dilithium squarate, Li2C4O4) as a pre-lithiation strategy in a LIC prototype fabricated in a pilot line. The synthesis of the sacrificial salt is scaled-up to produce 1 kg and is later incorporated in the positive electrode during the slurry formulation. After in-depth process optimization, 12 meter of a double side electrode are fabricated, achieving a high mass loading of 5.5 mg cm−2 for the HC negative electrode, and 14 mg cm−2 for the positive electrode accounting both the activated carbon and the dilithium squarate. On account of the satisfactory mechanical and electrochemical behaviour of the electrodes, multilayer pouch cell LIC prototypes are fabricated reaching 80 F each. Pre-lithiation is completed during the first ten cycles and after the required gas exhaustion, electrochemical performance of prototypes is also satisfactory. Moreover, fabricated pouch cells overcome a float test of 1600 h at 50 °C showing a capacitance retention of 84.3%. These results give clear evidence for the potential use of this strategy in real products and can foster research in the field to promote pre-lithiation by means of sacrificial salts as the final solution to the pre-lithiation step, both for LIBs and LICs.

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