Process and Product Development of Electrodes for Lithium‐Ion Cells

Kaiser, Jörg; Wenzel, Valentin; Nirschl, Hermann; Bitsch, Boris; Willenbacher, Norbert; Baunach, Michael; Schmitt, Markus; Jaiser, S.; Scharfer, Philip; Schabel, Wilhelm

doi:10.1002/cite.201300085

Cited by 59 publications

(43 citation statements)

References 25 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The investigation of the surface tension on both components of the electrode leads to the conclusion that this factor only has a small impact on the adhesion strength of the coated anode. The two other parameters varied in this study, the binder amount and the coating thickness, have a more significant impact on the adhesion strength and confirm the results issued from the literature …”

Section: Resultssupporting

confidence: 89%

“…In this context, the lithium‐ion technology, issued from the 3C application (cell phones, portable computers, and camcorders), has been widely implemented . Intensive research has been carried out during the last decades, especially regarding the improvement of this technology in terms of safety, performance, and production costs . One of the main levers to reduce the production cost of the lithium‐ion battery (LIB) is the increase in the thickness of electrode coating to reduce the amount of inactive material (current collectors and separators) in the cell .…”

Section: Introductionmentioning

confidence: 99%

“…That is why intensive research in the context of LIB is carried out to increase the understanding of this physical mechanism. Several factors strongly influencing the adhesion strength were identified, such as the binder amount or the coating thickness . Two main investigation strategies have been followed until now in the literature: 1) a parameter‐oriented way and 2) a process‐oriented way.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Investigation of the Adhesion Strength along the Electrode Manufacturing Process for Improved Lithium‐Ion Anodes

et al. 2019

View full text Add to dashboard Cite

Nowadays, lithium‐ion batteries (LIBs) represent a key technology for energy storage in electromobility or stationary applications. Lithium‐ion electrodes, more specifically their mechanical properties, such as the adhesion strength, play an active role for the life span of LIBd. Herein, parameter‐ and process‐oriented investigations are conducted within electrode manufacturing to identify the main levers to improve the mechanical characteristics of electrodes. Among the investigated factors and processes, the binder amount, the coating thickness, and the calendaring represent the main influencing factors of the adhesion strength. A transfer of these findings can play an important role for the implementation of new anode materials, such as silicon, enabling high‐energy batteries with increased lifetime.

show abstract

Section: Resultssupporting

confidence: 89%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Investigation of the Adhesion Strength along the Electrode Manufacturing Process for Improved Lithium‐Ion Anodes

et al. 2019

View full text Add to dashboard Cite

show abstract

“…Electrode properties may be influenced by every single step of the entire electrode production process [7]. The first step is mixing and dispersing.…”

Section: Introductionmentioning

confidence: 99%

Delamination behavior of lithium-ion battery anodes: Influence of drying temperature during electrode processing

et al. 2015

View full text Add to dashboard Cite

One essential process step during electrode processing for Li-ion batteries is the drying of the wet particulate electrode coating. The electrode film solidifies during evaporation of the solvent and a porous film is formed. In this study we focus on the influence of drying temperature on the internal electrode structure of the dry film. Anode slurries that consist of graphite and an aqueous binder system were coated and subsequently dried. To assure defined and controllable drying conditions, a laboratory set-up with a temperaturecontrolled substrate carrier and an impingement dryer was used. To facilitate a scale-up to continuously passed dryers the choice of experimental temperatures was based on a calculation of steady-state temperatures that result from gas temperatures that are commonly applied in industrial drying processes. The delamination behavior of the differently dried electrodes was investigated by means of a 90° peel test. The results show a strong dependency of electrode adhesion on drying temperature. A lower adhesion force at higher temperatures hints to a variation in binder content at the interface between the copper substrate and the coating layer. The formation of a consolidation Downloaded by [University of Manitoba Libraries] at 22:53 26 August 20152 layer at the air-film interface during drying is identified as a possible explanation and a criterion for consolidation layer formation is suggested.

show abstract

“…But a decreasing amount of solvent also affects the electrode structure. In fact, high filled suspensions present high viscosity values due to the reduced mobility of particles, which is beneficial to guarantee stability against sedimentation of large active material particles, agglomeration of small CB aggregates, and binder demixing during the drying process . Ligneel et al calculated the rates of film shrinking and particle settling during electrode drying.…”

Section: Introductionmentioning

confidence: 99%

Extrusion‐Based Processing of Cathodes: Influence of Solid Content on Suspension and Electrode Properties

2019

View full text Add to dashboard Cite

The influence of the solid content is investigated for cathodes with nickel cobalt manganese oxide (NCM) as an active material during the continuous dispersion in a twin‐screw extruder as well as during the coating and drying processes. Rheological and particle size distribution analyses are carried out to characterize the suspensions. Specifically, mechanical, structural, and electrochemical properties of the manufactured electrodes are determined. The presented results show that an increase in the solid content of the electrode suspension during the extrusion process results in a higher carbon black (CB) dispersion degree due to a higher energy input. At solid content above 80 wt%, delamination of conductive graphite and deposition of CB onto the active material occur. Furthermore, it is proved that within a range of 70–75 wt% solid content, the mechanical, conductive, and electrochemical performances can be enhanced.

show abstract

Process and Product Development of Electrodes for Lithium‐Ion Cells

Cited by 59 publications

References 25 publications

Investigation of the Adhesion Strength along the Electrode Manufacturing Process for Improved Lithium‐Ion Anodes

Investigation of the Adhesion Strength along the Electrode Manufacturing Process for Improved Lithium‐Ion Anodes

Delamination behavior of lithium-ion battery anodes: Influence of drying temperature during electrode processing

Extrusion‐Based Processing of Cathodes: Influence of Solid Content on Suspension and Electrode Properties

Contact Info

Product

Resources

About