An experimental and analytical study on intermittent slot die coating of viscoelastic battery slurries

Schmitt, Marcel; Diehm, Ralf; Scharfer, Philip; Schabel, Wilhelm
September 2015
Journal of Coatings Technology & Research;Sep2015, Vol. 12 Issue 5, p927
Academic Journal
Large-scale secondary lithium-ion batteries could be a key technology to compensate for the inconsistent energy supply of renewable sources. However, their manufacture is still very costly. In particular, the intermittent slot die coating of the battery electrodes is the speed-limiting and thus cost-driving process. In this field, various patents have been granted, and most in-house coating equipment was developed in industry. These technologies are often optimized empirically, since intermittent slot die coating is not mentioned in the scientific literature. In this work, we investigate the dominating and limiting mechanisms for intermittent slot die coating of non-Newtonian battery slurries. To characterize the process, we measured the system and die pressure and the associated wet film thickness. To build a common basis for all established technologies, we reduced the coating system to a syringe pump, a bypass valve, and a slot die. Our results show the direct link between casted film and pressure distribution within the coating. To reduce leveling times between the coating and interruption phases of an intermittent coating, a model was developed to predict the optimum pressure levels. It was found that different pressure levels during the coating and interruption phases lead to film break-ups or downstream die swelling, and thus limit the whole process.


Related Articles

  • Synthesis and Characterization of 0.5Li2MnO3-0.5LiNi1/4Mn1/4Co1/2O2/C Composite with Improved Performance for Lithium Ion Battery. Deng, C.; Sun, Y. H.; Zhang, S.; Shang, Y.; Dong, Z.; Wu, Y. X. // International Journal of Electrochemical Science;Oct2012, Vol. 7 Issue 10, p10047 

    0.5Li2MnO3-0.5LiNi1/4Mn1/4Co1/2O2/C composite is prepared by coprecipitation method followed by sintering with sucrose in the air. The 0.5Li2MnO3-0.5LiNi1/4Mn1/4Co1/2O2/C composite is characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electroscopy (TEM)...

  • OT/HPR eyechart.  // Ophthalmology Times;9/11/95, Vol. 20 Issue 35, p1 

    Presents a graph showing the median price paid to viscoelastic manufacturers.

  • Growth of adhesive contacts for Maxwell viscoelastic spheres. Jagota, A.; Mazur, S. // Journal of Applied Physics;1/1/1998, Vol. 83 Issue 1, p250 

    Analyzes coalescence of a Maxwell viscoelastic sphere in the study of the transition from initial elastic adhesion to viscous sintering. Information on the formulation for surface forces; Other information on the initial elastic contact.

  • Synthesis and characterization of functional six-membered ring carbonates for the preparation of orthogonal couplers. Anders, Thorsten; Keul, Helmut; Möller, Martin // e-Polymers;Aug2011, p1 

    On the basis of commercially available trimethylolpropane (TMP) three six-membered ring carbonates were prepared, substituted with reactive side groups: a chloroformate (2a), an imidazolyl carbamate (2b) and a phenyl carbonate (2c). Their synthesis and characterizations are described and...

  • Batteries get a boost.  // Engineer (00137758);10/31/2011, Vol. 296 Issue 7827, p12 

    The article reports on the fluoride shuttle-based concept for rechargeable batteries that was developed by the researchers from Karlsruhe Institute of Technology in Germany wherein it enhances the storage capacity and improved the safety properties of lithium-ion batteries.

  • What Does Healon5 Have to Offer? McDermott, Gillian K. // Review of Ophthalmology;Apr2001, Vol. 8 Issue 4, p62 

    Discusses the benefits of using Healon5, a viscoelastic and its difference from the other products already existing in the market. Effect of phacoemulsification techniques; Testimonies of those who have used it; Other applications of the viscoelastic and the importance of learning its...

  • Influence of viscosity relaxation on the growth rate of the Tonks�Frenkel instability. Shiryaeva, S. O.; Grigor�ev, O. A. // Technical Physics Letters;Jan99, Vol. 25 Issue 1, p41 

    A numerical analysis of the dispersion equation for the capillary motion of a viscoelastic liquid is used to show that the growth rate of the instability of a charged free liquid surface increases substantially as the characteristic time for the relaxation of viscous stresses and the...

  • New treatment for osteoarthritis.  // Drug Topics;9/15/97, Vol. 141 Issue 18, p7 

    Reports that a viscoelastic modifying agent has been approved for the treatment of pain in osteoarthritis of the knee. Who is marketing the product; How the drug is administered.

  • OT/HTR eyechart.  // Ophthalmology Times;7/24/95, Vol. 20 Issue 28, p1 

    Presents a graph of viscoelastic material utilization by ophthalmologists in the United States as of the first quarter of fiscal year 1995.


Read the Article


Sorry, but this item is not currently available from your library.

Try another library?
Sign out of this library

Other Topics