New Flexible Slot Die Process Increases Manufacturing Speed of Battery Electrodes

Researchers at the Karlsruhe Institute of Technology have developed a new method for the fast manufacturing of electrode foils which enables the production of lithium-ion batteries at lower costs. The new technology increases the production speed of electrode foils by a factor of three.

Image Credit: M. Schmitt/KIT

The transformation of the energy system, or ‘Energiewende’, is very important and lithium-ion batteries are considered to play a significant role in this system.

An energy storage system is required for electric vehicles and fluctuating renewable energy sources but the current solutions are very expensive.

Manufacturers have been able to achieve speeds ranging from 25 to 35 metres per minute for the production of electrode foils.

The researchers at the Institute of Thermal Process Engineering at Karlsruhe Institute of Technology have developed a flexible slot die process which can increase this speed to 100 metres per minute.

This ground-breaking new coating technology was developed as part of the ‘Competence E’ project and also enables the manufacture of highly accurate patterns with high precision.

The researchers at the Karlsruhe Institute of Technology used a slurry comprised of the active material, binder, additives, solvent and carbon black and applied to this to a copper substrate foil for the anode and an aluminium substrate foil for the cathode.

To produce the electrode foil, the research team applied this slurry onto the substrate foils. Though this method enables continuous production, superior processability is achieved using intermittent coatings.

In order to achieve intermittent coatings, start and stop edges must be specifically defined and for this the researchers used a movable membrane in the coating head of the slot die. They controlled the rapid to and fro movement of this membrane to achieve highly precise intermittent patterns. Frequencies as high as 1000 electrode patterns per minute were achieved.

With this development, Karlsruhe Institute of Technology scientists have achieved the German Engineering Association’s goal of achieving 100 metres per minute coating speed by 2030.

The combination of KIT’s helix technology for manufacturing spirally wound lithium-ion batteries and the new coating technology will provide advantages in terms of cost for production of lithium-ion batteries in the future.

Alexander Chilton

Written by

Alexander Chilton

Alexander has a BSc in Physics from the University of Sheffield. After graduating, he spent two years working in Sheffield for a large UK-based law firm, before relocating back to the North West and joining the editorial team at AZoNetwork. Alexander is particularly interested in the history and philosophy of science, as well as science communication. Outside of work, Alexander can often be found at gigs, record shopping or watching Crewe Alexandra trying to avoid relegation to League Two.

Citations

Please use one of the following formats to cite this article in your essay, paper or report:

  • APA

    Chilton, Alexander. (2019, March 18). New Flexible Slot Die Process Increases Manufacturing Speed of Battery Electrodes. AZoM. Retrieved on April 16, 2024 from https://www.azom.com/news.aspx?newsID=42723.

  • MLA

    Chilton, Alexander. "New Flexible Slot Die Process Increases Manufacturing Speed of Battery Electrodes". AZoM. 16 April 2024. <https://www.azom.com/news.aspx?newsID=42723>.

  • Chicago

    Chilton, Alexander. "New Flexible Slot Die Process Increases Manufacturing Speed of Battery Electrodes". AZoM. https://www.azom.com/news.aspx?newsID=42723. (accessed April 16, 2024).

  • Harvard

    Chilton, Alexander. 2019. New Flexible Slot Die Process Increases Manufacturing Speed of Battery Electrodes. AZoM, viewed 16 April 2024, https://www.azom.com/news.aspx?newsID=42723.

Tell Us What You Think

Do you have a review, update or anything you would like to add to this news story?

Leave your feedback
Your comment type
Submit

While we only use edited and approved content for Azthena answers, it may on occasions provide incorrect responses. Please confirm any data provided with the related suppliers or authors. We do not provide medical advice, if you search for medical information you must always consult a medical professional before acting on any information provided.

Your questions, but not your email details will be shared with OpenAI and retained for 30 days in accordance with their privacy principles.

Please do not ask questions that use sensitive or confidential information.

Read the full Terms & Conditions.