Development of Roll-to-Roll High Speed Laser Micro Processing Machine for Preparing Through-holed Anodes and Cathodes of Lithium-ion Batteries
| Autor: | Mitsuru Yamada, Naohiko Soma, Masaya Tsuta, Susumu Nakamura, Nobuo Ando, Futoshi Matsumoto |
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| Rok vydání: | 2023 |
| Předmět: | |
| Zdroj: | International Journal of Extreme Manufacturing. |
| ISSN: | 2631-7990 2631-8644 |
| Popis: | To improve the battery performance of lithium-ion batteries (LIBs), modifying the anodes and cathodes of LIBs using laser beams to prepare through-holes, nonthrough-holes or ditches in the arrangements of grid and line patterns has been proposed by many researchers and engineers. In this study, a laser system with a roll-to-roll machine, which realizes this modification without large changes in the present mass-production system, was developed. The laser system apparatus comprises a roll-to-roll system in which a hollow cylindrical body with openings on a circumferential surface is the main part and laser equipment is attached. A foil of thin electrode for LIBs is wound around the cylindrical body in the longitudinal direction of the thin electrode. The pulsed beam reflected from a central axis of the cylindrical body can continuously open a large number of through-holes in the thin electrode. The through-holes were formed at a rate of 100000 holes per second on the lithium iron phosphate (LiFePO4, LFP) cathodes and graphite anodes used in this study. The through-holed cathode and anode prepared with this system exhibited higher C-rate performance than nonholed (nontreated) anodes and cathodes. |
| Databáze: | OpenAIRE |
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