Process and Material Analysis of Laser- and Convection-Dried Silicon–Graphite Anodes for Lithium-Ion Batteries

Drying electrodes is very cost-intensive as it is characterized by high energy and space consumption. Laser drying is considered a promising alternative process due to direct energy input and lower operating costs. However, it is unclear whether the same product and process quality can be achieved w...

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Published inWorld electric vehicle journal Vol. 14; no. 4; p. 87
Main Authors Wolf, Sebastian, Garbade, Laura, Göken, Vinzenz, Tien, Rebekka, Börner, Markus, Neb, Daniel, Heimes, Heiner Hans
Format Journal Article
LanguageEnglish
Published Basel MDPI AG 01.03.2023
Subjects
Anodes
Carbon black
Convection
Drying
Drying ovens
Electrical resistivity
electrode manufacturing
Electrodes
Energy consumption
Graphite
laser drying
Lasers
Lithium
Lithium-ion batteries
lithium-ion battery production
Moisture effects
Operating costs
Ovens & stoves
Protective coatings
Rechargeable batteries
Semiconductor lasers
Silicon
silicon–graphite anodes
Solvents
Thermography
Thermogravimetric analysis
Berlin Germany
Germany
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Summary:Drying electrodes is very cost-intensive as it is characterized by high energy and space consumption. Laser drying is considered a promising alternative process due to direct energy input and lower operating costs. However, it is unclear whether the same product and process quality can be achieved with laser drying. Silicon–graphite anodes with different silicon contents were processed using either a high-power diode laser or a convection oven. The laser-drying process was investigated using thermography, and the effect of laser drying on the electrode quality was examined using adhesion and residual moisture measurements. Furthermore, thermogravimetric analysis, SEM images and electrical conductivity were used to analyse the laser- and convection-dried anodes. It was shown that silicon–graphite anodes can also be manufactured using laser drying, with a significant reduction in drying time of over 80%.
ISSN:2032-6653
2032-6653
DOI:10.3390/wevj14040087