Targeting new ways for large-scale,high-speed surface functionalization using direct laser interference patterning in a roll-to-roll process

作     者：Christoph Zwahr Nicolas Serey Lukas Nitschke Christian Bischoff Ulrich Radel Alexandra Meyer Penghui Zhu Wilhelm Pfleging Christoph Zwahr;Nicolas Serey;Lukas Nitschke;Christian Bischoff;Ulrich Rädel;Alexandra Meyer;Penghui Zhu;Wilhelm Pfleging

作者机构：Laser Precision ManufacturingFraunhofer Institute for Material and Beam Technology(IWS)DresdenGermany Topag Lasertechnik GmbHDarmstadtGermany Institute of Manufacturing Science and EngineeringTechnical University DresdenDresdenGermany Institute for Applied Materials—Applied Materials Physics(IAM-AWP)Karlsruhe Institute of Technology(KIT)Eggenstein-LeopoldshafenGermany 

出 版 物：《International Journal of Extreme Manufacturing》 (极端制造(英文))

年 卷 期：2023年第5卷第3期

页      面：569-583页

核心收录：

学科分类：0808[工学-电气工程] 08[工学] 0807[工学-动力工程及工程热物理] 

基　　金：funded by the German Federal Ministry of Education and Research(BMBF),project NextGen-3DBat,Grant Number 03XP0198F by the Fraunhofer Cluster of Excellence Advanced Photon Sources(CAPS) 

主　　题：DLIP lithium-ion battery surface texturing copper aluminum 

摘      要：Direct Laser Interference Patterning(DLIP)is used to texture current collector foils in a roll-to-roll process using a high-power picosecond pulsed laser system operating at either fundamental wavelength of 1064 nm or 2nd harmonic of 532 *** raw beam having a diameter of 3 mm@1/e^(2) is shaped into an elongated top-hat intensity profile using a diffractive so-called FBS■-L element and cylindrical *** shaped beam is split into its diffraction orders,where the two first orders are parallelized and guided into a galvanometer *** deflected beams inside the scan head are recombined with an F-theta objective on the working position generating the interference *** DLIP spot has a line-like interference pattern with about 15μm spatial *** fluences of up to 8 J cm^(-2) were achieved using a maximum pulse energy of 0.6 ***,an in-house built roll-to-roll machine was *** this setup,aluminum and copper foil of 20μm and 9μm thickness,respectively,could be *** to current collector structuring coating of composite electrode material took *** case of lithium nickel manganese cobalt oxide(NMC 622)cathode deposited onto textured aluminum current collector,an increased specific discharge capacity could be achieved at a C-rate of 1℃.For the silicon/graphite anode material deposited onto textured copper current collector,an improved rate capability at all C-rates between C/10 and 5℃ was *** rate capability was increased up to 100%compared to reference *** C-rates between C/2 and 2℃,the specific discharge capacity was increased to 200 mAh g^(-1),while the reference electrodes with untextured current collector foils provided a specific discharge capacity of 100 m Ah g^(-1),showing the potential of the DLIP technology for cost-effective production of battery cells with increased cycle lifetime.