Edge Formation in High‐Speed Intermittent Slot‐Die Coating of Disruptively Stacked Thick Battery Electrodes

Diehm, Ralf; Weinmann, Hannes W.; Kumberg, Jana; Schmitt, Markus; Fleischer, Jürgen; Scharfer, Philip; Schabel, Wilhelm

doi:10.1002/ente.201900137

Cited by 22 publications

(33 citation statements)

References 7 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…20,44 Experts that expressed knowledge about this process anticipated either an industrialization of highspeed single sheet stacking, where advanced pick-and-place systems are used to increase productivity, 45 or the implementation of roll-to-roll technology such as coil-to-stack, which is characterized by a device that produces the cell stack from three continuously unwinding coils for cathodes, separators, and anodes. 46 All experts expect reductions in the time required to produce the cell stack, and the average value is decreasing from 0.8 s sheet À1 in 2020 to 0.4 s sheet À1 in 2030. In cell conditioning, the consulted experts anticipate productivity in the cost-intensive formation and aging procedures.…”

Section: Process Technology Roadmapmentioning

confidence: 99%

Technological innovation vs. tightening raw material markets: falling battery costs put at risk

et al. 2022

View full text Add to dashboard Cite

show abstract

Section: Process Technology Roadmapmentioning

confidence: 99%

Technological innovation vs. tightening raw material markets: falling battery costs put at risk

et al. 2022

View full text Add to dashboard Cite

show abstract

“…This implicates that the electrodes, in particularly the primary layer, have to be manufactured with preferably high production throughput. [15,16] Another cost-benefit arises from the application of aqueous slurry formulations due to lower material and postprocessing expenditures.…”

Section: Introductionmentioning

confidence: 99%

High‐Speed Coating of Primer Layer for Li‐Ion Battery Electrodes by Using Slot‐Die Coating

et al. 2020

Self Cite

View full text Add to dashboard Cite

A reduction of the inactive components can increase the energy density and reduce production cost of Li‐ion batteries. But an effective reduction of the binder amount also negatively affects the adhesion of the electrode. Herein, slot‐die coating of a primer layer for Li‐ion anodes is investigated. It is shown that the use of a primer layer with only 0.3 g m−2 can increase the adhesive force by the factor of 5 as well as the cell performance for anodes with low binder content. The process limits for a stable, defect‐free primer coating are investigated at coating speeds of up to 550 m min−1. The limits coincide both for a setup without vacuum box and with vacuum box with theory‐based equations. By using a vacuum box, the minimum wet film thickness can be reduced by half.

show abstract

“…Rheological investigations allow an insight into the flowability of the slurry, which is crucial for the coating process and the process stability. [36,[38][39][40] To investigate the influence of particle morphology on the electrode production process, slurries were prepared using the same composition and procedure, and the flow behavior was characterized. An overview of the composition of the slurries used for these studies is shown in Table 2.…”

Section: Slurry Composition and Flow Behaviormentioning

confidence: 99%

Drying of NCM Cathode Electrodes with Porous, Nanostructured Particles Versus Compact Solid Particles: Comparative Study of Binder Migration as a Function of Drying Conditions

et al. 2022

Self Cite

View full text Add to dashboard Cite

1/3 Mn 1/3 )O 2 (NCM111), morphologies such as preferentially oriented crystals in the particles, [2] nanobrick morphology, [3] one-dimensional hierarchical microrods, [4] and hierarchically structured particles [5][6][7][8][9] were investigated. The latter is achieved by forming secondary particles with open intraparticle pore structure from assembled primary particles. The advantages of such structures are higher rate capability and improved cycling stability, due to a larger interface between active material and electrolyte, smaller diffusion paths and lower mechanical stress during cycling. By modifying the particle morphology of commercial compact materials in a few additional process steps, a comparison can be made between the commercial starting material and the produced structured material. This approach was applied in the work of Wagner et al. [9] by grinding, spray drying and calcination commercial NCM111. The influences of the process parameters in the production of such structures on the electrochemical properties as a function of the particle morphology were investigated. The optimum sintering temperature was found to be between 850 and 900 C, resulting in primary particle diameters of 350 and 550 nm. It is the optimum between the demands of the ionic conductivity of the primary particles and the electrical conductivity of the secondary particles. During the sintering process, the primary particles grow, which aggravates ion diffusion but increases the electrical conductivity due to sinter necks. The specific capacity was improved from 20 to 100 mAh g À1 at 10C for the original and the structured particles, respectively. [9]

show abstract

Edge Formation in High‐Speed Intermittent Slot‐Die Coating of Disruptively Stacked Thick Battery Electrodes

Cited by 22 publications

References 7 publications

Technological innovation vs. tightening raw material markets: falling battery costs put at risk

Technological innovation vs. tightening raw material markets: falling battery costs put at risk

High‐Speed Coating of Primer Layer for Li‐Ion Battery Electrodes by Using Slot‐Die Coating

Drying of NCM Cathode Electrodes with Porous, Nanostructured Particles Versus Compact Solid Particles: Comparative Study of Binder Migration as a Function of Drying Conditions

Contact Info

Product

Resources

About