Wiki article for the KPI: Layer thickness of the calendered electrode
Measuring the layer thickness of the calendered electrode film is essential to ensure uniformity and consistency in battery production. Here are some of the most important measuring techniques for determining the layer thickness of the calendered electrode film, along with relevant standards and references for each technique:
Measuring technique 1: Optical Profilometry:
Description: Optical profilometry is a non-contact surface metrology technique that measures surface height variations. It can be used to scan the calendered electrode film's surface and generate a three-dimensional map, allowing for the determination of the layer thickness.
Relevant Standard: There is no specific standard solely dedicated to optical profilometry for measuring the layer thickness of calendered electrode films in battery production. However, guidelines for optical surface metrology can be considered, such as ISO 25178-2:2021 - Geometrical product specifications (GPS) -- Surface texture: Areal -- Part 2: Terms, definitions, and surface texture parameters (https://www.iso.org/standard/74591.html).
Reference: "Handbook of Optical Metrology: Principles and Applications" Second ddition, edited by Toru Yoshizawa, published 2017 (ISBN: 9781138893634). https://books.google.de/books/about/Handbook_of_Optical_Metrology.html?id=QpkuDwAAQBAJ&redir_esc=y
Measuring technique 2: Scanning Electron Microscopy (SEM):
Description: Scanning Electron Microscopy (SEM) is a powerful imaging technique that provides high-resolution images of the calendered electrode film's surface. It can be used to measure the layer thickness at various locations on the film.
Relevant Standard: There is no specific standard solely dedicated to SEM for measuring the layer thickness of calendered electrode films in battery production. However, guidelines for SEM imaging and analysis can be considered, such as ASTM E1508-12(2019) - Standard Guide for Quantitative Analysis by Energy-Dispersive Spectroscopy (https://www.astm.org/e1508-12ar19.html).
Reference: "Scanning Electron Microscopy and X-Ray Microanalysis" by Joseph Goldstein, et al. (ISBN: 978-1-4939-6676-9). https://link.springer.com/book/10.1007/978-1-4939-6676-9
Measuring technique 3: Cross-Sectional Analysis:
Description: Cross-sectional analysis involves cutting a sample of the calendered electrode film and then using microscopy or imaging techniques to measure the thickness of the layers.
Relevant Standard: There is no specific standard solely dedicated to cross-sectional analysis for measuring the layer thickness of calendered electrode films in battery production. However, guidelines for sample preparation and microscopy analysis can be considered, such as ISO 25178-70:2014 - Geometrical product specifications (GPS) -- Surface texture: Areal -- Part 70: Calibration and measurement of areal surface texture parameters (https://www.iso.org/standard/57688.html).
Reference: "Handbook of Microscopy: Applications in Materials Science, Solid-State Physics, and Chemistry, Applications" S. Amelinckx and et. al. (ISBN: 978-3-527-62075-3).
Unit for Layer Thickness: The layer thickness of the calendered electrode film is typically expressed in units of micrometres (μm) or nanometres (nm), depending on the resolution of the measuring technique.
It's important to note that the choice of measuring technique for layer thickness may depend on factors such as the required resolution, the specific characteristics of the calendered electrode film, and the specific requirements of the battery production process. Manufacturers may adopt in-house methods or follow industry-specific guidelines to ensure accurate measurement of the layer thickness in the calendered electrode film during battery production. For specific applications and guidelines related to layer thickness measurement in battery production, you may refer to research papers and guidelines published by battery manufacturers and research institutions in the field of battery technology.
This content was generated with the assistant of GhatGPT and was reviewed by battery scientists. If you have suggestions for further improvements, or you use other measuring techniques, standards and protocols in your lab, please reach out to us and send a mail to info@celest.com. Together we can improve this knowledge base even more.