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Recent progress in laser texturing of battery materials: a review of tuning electrochemical performances, related material development, and prospects for large-scale manufacturing

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International Journal of Extreme Manufacturing 2021年第1期3卷 25-44页

作者： wilhelm pfleging Institute for Applied Materials-Applied Materials Physics Karlsruhe Institute of TechnologyP.O.Box 3640Karlsruhe 76021Germany

Traditional electrode manufacturing for lithium-ion batteries is well established,reliable,and has already reached high processing speeds and improvements in production *** modern electric vehicles,however,the need for batteries with high gravimetric and volumetric energy densities at cell level is increasing;and new production concepts are required for this *** the last decade,laser processing of battery materials emerged as a promising processing tool for either improving manufacturing flexibility and product reliability or enhancing battery *** cutting and welding already reached a high level of maturity and it is obvious that in the near future they will become frequently implemented in battery production *** review focuses on laser texturing of electrode materials due to its high potential for significantly enhancing battery performances beyond *** approaches and processing strategies for new electrode architectures and concepts will be presented and discussed with regard to energy and power density *** boost of electrochemical performances due to laser texturing of energy storage materials is currently proven at the laboratory ***,promising developments in high-power,ultrafast laser technology may push laser structuring of batteries to the next technical readiness level *** demonstration in pilot lines adapted to future cell production,process upscaling regarding footprint area and processing speed are the main issues as well as the economic aspects with regards to CapEx amortization and the benefits resulting from the next generation *** review begins with an introduction of the three-dimensional battery and thick film concept,made possible by laser *** processing of electrode components,namely current collectors,anodes,and cathodes will be *** types of electrode architectures,such as holes,grids,and lines,were generated;their impact

关键词： laser structuring lithium-ion battery electrode architecture 3D battery cell performance upscaling

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Effects of self-healing biomimetic subsoiler on tillage resistance, wearcorrosion performance and soil disturbance morphology under different soil types

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International Journal of Agricultural and Biological Engineering 2023年第3期16卷 7-14页

作者： Yueming Wang Chenjie Lu Jing Chen Chenhuan Cui Yijie Pan wilhelm pfleging Jiyu Sun School of Engineering Huzhou UniversityHuzhou 313000ZhejiangChina Liaoning Provincial Institute of Agricultural Mechanization Shenyang 110161China School of Information and Electrical Engineering Hangzhou City University51 Huzhou StreetHangzhou 310015China FUSTEEL Co. LtdHuzhou 313000ZhejiangChina Institute for Applied Materials-Applied Materials Physics Karlsruhe Institute of TechnologyKarlsruhe 76344Germany Key Laboratory of Bionic Engineering(Ministry of Education China)Jilin UniversityChangchun 130022China

Subsoiling has been widely used all over the world as an important operation method of no-tillage *** energy-saving and life-extension,the tillage resistance and wear-corrosion of subsoilers have attracted wide *** this study,the tillage resistance,soil disturbance,wear and corrosion of subsoiler with S-T-SK-2#biomimetic structures(S means subsoiler;T means tine;SK means shank;2#,h/s=0.57,h=5 mm andα=45°.)and self-healing coating under two seasons,two locations with different soil properties(black loam and clay soil)and subsoiling speeds(2 km/h and 3.6 km/h)were *** soil moisture content and compactness affected the tillage resistance and *** tillage resistance and degree of corrosion on all subsoilers were much larger in clay soil than that in black loam *** with S-T-SK-2#,the tillage reduction rate of C-S-T-SK-2#(S-T-SK-2#with self-healing coating)was up to 14.32%in clay soil under the speed of 2 km/*** significance tests of regression equation results showed that subsoiler type and soil properties had a significant impact on soil disturbance coefficient,swelling of total soil layer,bulkiness of the plough *** is of a guiding significance for the analysis of soil *** mechanism of subsoiler coupling with biomimetic structures and self-healing coating was analyzed in *** depicted the guiding effect of biomimetic structure and the shield function of self-healing coating,resulting in anticorrosion and wear resistance of subsoiler.

关键词： soil types tillage resistance wear-corrosion soil disturbance self-healing

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

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International Journal of Extreme Manufacturing 2023年第3期5卷 569-583页

作者： Christoph Zwahr Nicolas Serey Lukas Nitschke Christian Bischoff Ulrich Radel Alexandra Meyer Penghui Zhu wilhelm pfleging Laser Precision Manufacturing Fraunhofer Institute for Material and Beam Technology(IWS)DresdenGermany Topag Lasertechnik GmbH DarmstadtGermany Institute of Manufacturing Science and Engineering Technical University DresdenDresdenGermany Institute for Applied Materials—Applied Materials Physics(IAM-AWP) Karlsruhe Institute of Technology(KIT)Eggenstein-LeopoldshafenGermany

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.

关键词： DLIP lithium-ion battery surface texturing copper aluminum

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Laser-Treated Surfaces for VADs:From Inert Titanium to Potential Biofunctional Materials

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Biomedical Engineering Frontiers 2022年第1期3卷 399-406页

作者： Eduardo Bock wilhelm pfleging Dayane Tada Erenilda Macedo Nathalia Premazzi Rosa Sá Juliana Solheid Heino Besser Aron Andrade Laboratory of Bioengineering and Biomaterials Federal Institute of Technology in Sao Paulo(IFSP)Sao PauloBrazil Center of Engineering in Circulatory Assistance Institute Dante Pazzanese of Cardiology(IDPC)Sao PauloBrazil Institute for Applied Materials-Applied Materials Physics Karlsruhe Institute of Technology(KIT)KarlsruheGermany Federal University of Sao Paulo(UNIFESP) Sao Jose dos CamposBrazil National Institute for Space Research(INPE) Sao Jose dos CamposBrazil

***-treated surfaces for ventricular assist *** *** work has scientific impact since it proposes a biofunctional surface created with laser processing in bioinert *** diseases are the world’s leading cause of *** especially debilitating heart disease is congestive heart *** the possible therapies,heart transplantation and mechanical circulatory assistance are the main treatments for its severe form at a more advanced *** development of biomaterials for ventricular assist devices is still being carried *** polished titanium is currently employed in several devices,its performance could be improved by enhancing the bioactivity of its *** to improve the titanium without using coatings that can be detached,this work presents the formation of laser-induced periodic surface structures with a topology suitable for cell adhesion and neointimal tissue *** surface was modified by femtosecond laser ablation and cell adhesion was evaluated in vitro by using fibroblast *** results indicate the formation of the desired topology,since the cells showed the appropriate adhesion compared to the control *** electron microscopy showed several positive characteristics in the cells shape and their surface *** in vitro results obtained with different topologies point that the proposed LIPSS would provide enhanced cell adhesion and *** laser processes studied can create new interactions in biomaterials already known and improve the performance of biomaterials for use in ventricular assist devices.

关键词： titanium biomaterials Titanium

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