@article{Yamada2023, 
author = {Mitsuru Yamada and Naohiko Soma and Masaya Tsuta and Susumu Nakamura and Nobuo Ando and Futoshi Matsumoto},
title = {Development of a roll-to-roll high-speed laser micro processing machine for preparing through-holed anodes and cathodes of lithium-ion batteries},
year = {2023},
journal = {International Journal of Extreme Manufacturing},
volume = {5},
number = {3},
pages = {035004},
keywords = {lithium-ion batteries, laser processing system, roll-to-roll system, through-holing structure, high-rate performance},
url = {https://www.sciopen.com/article/10.1088/2631-7990/acd917},
doi = {10.1088/2631-7990/acd917},
abstract = {Aiming to improve the battery performance of lithium-ion batteries (LIBs), modification of the cathodes and anodes of LIBs using laser beams to prepare through-holes, non-through-holes or ditches arranged in grid and line patterns has been proposed by many researchers and engineers. In this study, a laser processing system attached to rollers, which realizes this modification without large changes in the present mass-production system, was developed. The laser system apparatus comprises roll-to-roll equipment and laser equipment. The roll-to-roll equipment mainly consists of a hollow cylinder with openings on its circumferential surface. Cathode and anode electrodes for LIBs are wound around the cylinder in the longitudinal direction of the electrodes. A pulsed beam reflected from the central axis of the cylinder can continuously open a large number of through-holes in the thin electrodes. Through-holes were formed at a rate of 100 000 holes per second on lithium iron phosphate cathodes and graphite anodes with this system. The through-holed cathodes and anodes prepared with this system exhibited higher C-rate performance than nontreated cathodes and anodes.}
}