A Comparative Study on Cutting Electrodes for Batteries with Lasers

Luetke, Matthias; Franke, Volker; Techel, Anja; Himmer, Thomas; Klotzbach, Udo; Wetzig, Andreas; Beyer, Eckhard

doi:10.1016/j.phpro.2011.03.135

Cited by 47 publications

(18 citation statements)

References 1 publication

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“…The trend of these dependencies was also found in investigations with pulsed laser beam sources. In addition to this, the investigations showed that with pulsed beam sources in the nanosecond range, higher pulse repetition frequencies enabled higher cutting speeds and led to a smaller chamfer width [19]. By using an ns pulsed fiber laser (1070 nm, 100 W, 50 µm spot size, 500 kHz, and 30 ns), it was possible for Kronthaler et al [23] to cut an anode (114 µm) with a collector thickness of 10 µm at a speed of 1200 mms −1 .…”

Section: State Of the Art Laser Cutting Of Electrodesmentioning

confidence: 88%

“…The results showed that the use of single-mode cw fiber lasers made it possible to achieve very high, industry-relevant cutting speeds due to the high average power and the achievable low spot sizes. Studies showed that it was possible to cut an anode (120 µm) with 11,666 mms −1 and a cathode (130 µm) with 10,000 mms −1 with a single-mode cw fiber laser at a wavelength in the infrared range (1070 nm), an average power of 5000 W, and a spot size of 25 µm [19]. This resulted in an energy density of 2000 jcm −2 for the cut-through limit of the cathode and an energy density of 1714 jcm −2 for the anode.…”

Section: State Of the Art Laser Cutting Of Electrodesmentioning

confidence: 99%

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Influence of Laser-Generated Cutting Edges on the Electrical Performance of Large Lithium-Ion Pouch Cells

et al. 2019

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Laser cutting is a promising technology for the singulation of conventional and advanced electrodes for lithium-ion batteries. Even though the continuous development of laser sources, beam guiding, and handling systems enable industrial relevant high cycle times, there are still uncertainties regarding the influence of, for this process, typical cutting edge characteristics on the electrochemical performance. To investigate this issue, conventional anodes and cathodes were cut by a pulsed fiber laser with a central emission wavelength of 1059–1065 nm and a pulse duration of 240 ns. Based on investigations considering the pulse repetition frequency, cutting speed, and line energy, a cell setup of anodes and cathodes with different cutting edge characteristics were selected. The experiments on 9 Ah pouch cells demonstrated that the cutting edge of the cathode had a greater impact on the electrochemical performance than the cutting edge of the anode. Furthermore, the results pointed out that on the cathode side, the contamination through metal spatters, generated by the laser current collector interaction, had the largest impact on the electrochemical performance.

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Section: State Of the Art Laser Cutting Of Electrodesmentioning

confidence: 88%

Section: State Of the Art Laser Cutting Of Electrodesmentioning

confidence: 99%

Influence of Laser-Generated Cutting Edges on the Electrical Performance of Large Lithium-Ion Pouch Cells

et al. 2019

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“…Due to their mass inertia, mechanically-guided welding optics do not deliver the accuracy and speed of the favored remote optics. In the scientific landscape, the method of remote laser cutting conventional endless Electrode foils (NMC, NCA, LFP cathodes or graphite anodes) is widely discussed [7][8][9][10].…”

Section: State Of the Art Cutting Of Electrodesmentioning

confidence: 99%

Processing of Advanced Battery Materials—Laser Cutting of Pure Lithium Metal Foils

et al. 2018

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Due to the increasing demand for high-performance cells for mobile applications, the standards of the performance of active materials and the efficiency of cell production strategies are rising. One promising cell technology to fulfill the increasing requirements for actual and future applications are all solid-state batteries with pure lithium metal on the anode side. The outstanding electrochemical material advantages of lithium, with its high theoretical capacity of 3860 mAh/g and low density of 0.534 g/cm3, can only be taken advantage of in all solid-state batteries, since, in conventional liquid electrochemical systems, the lithium dissolves with each discharging cycle. Apart from the current low stability of all solid-state separators, challenges lie in the general processing, as well as the handling and separation, of lithium metal foils. Unfortunately, lithium metal anodes cannot be separated by conventional die cutting processes in large quantities. Due to its adhesive properties and toughness, mechanical cutting tools require intensive cleaning after each cut. The presented experiments show that remote laser cutting, as a contactless and wear-free method, has the potential to separate anodes in large numbers with high-quality cutting edges.

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“…Beyond these electro-analytical applications, pulsed laser sources have been to elucidate the structure of the electrode/solution interface, e.g., to study the electrical double layer on mercury and platinum and gold singlecrystal electrodes, and to probe the electrode kinetics of fast reactions. Luetke et al (2011) used lasers to cut electrodes for lithium-ion cells. The electrodes were cathode material coated with aluminum foils and anode coated with copper foils.…”

Section: Introductionmentioning

confidence: 99%

Remanufacturing cathode from end-of-life of lithium-ion secondary batteries by Nd:YAG laser radiation

Liu

Zhang

Qing

et al. 2015

Clean Techn Environ Policy

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The electric vehicle industry has been rapidly developing internationally. Electric vehicle batteries (EVBs) are perceived as a low environmental impact energy storage technology. While the service life of an EVB is relatively long, a significant number of battery packs will reach the end of their service lives eventually. The end-of-life (EOL) EVBs may still have appreciable residual value for remanufacturing and secondary use. Some solid-electrolyte interface (SEI) layers will persist on the surface of electrodes deposit after a period of continuous cycling, causing the battery degradation and failure. An approach to battery end-of-life management was introduced involving remanufacturing of the cathode from EOL lithium-ion battery electrodes, and a recent study on remanufacturing process of the degraded EVBs using pulse laser to radiate SEI on the electrode surface was presented in this paper, here on a laboratory scale. Based on experimental data, the SEI film removal was carried out with laser energy intensity ranging from 0.035 to 0.169 J/mm 2 . The remanufactured cathodes were characterized through a combination of scanning electron microscopy, Fourier transform infrared spectroscopy, and wavelength dispersive spectrometer, respectively. The experimental results indicated that the remanufacturing treatments were successful in removing the EOL by-products (e.g., SEI films) and upgrading the cathode to its pre-cycling functionality. It is suggested that the fade capacity of a lithium-ion battery can be recovered by using laser radiation method.

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A Comparative Study on Cutting Electrodes for Batteries with Lasers

Cited by 47 publications

References 1 publication

Influence of Laser-Generated Cutting Edges on the Electrical Performance of Large Lithium-Ion Pouch Cells

Influence of Laser-Generated Cutting Edges on the Electrical Performance of Large Lithium-Ion Pouch Cells

Processing of Advanced Battery Materials—Laser Cutting of Pure Lithium Metal Foils

Remanufacturing cathode from end-of-life of lithium-ion secondary batteries by Nd:YAG laser radiation

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