Laser cutting of lithium iron phosphate battery electrodes: Characterization of process efficiency and quality

Lutey, Adrian H. A.; Fortunato, Alessandro; Ascari, Alessandro; Carmignato, Simone; Leone, Claudio

doi:10.1016/j.optlastec.2014.07.023

Cited by 43 publications

(24 citation statements)

References 34 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Table 2 shows the detailed characteristics of the laser system. Although this laser source was specifically developed for marking [12,33,34], trimming [35,36], and milling [16][17][18][35][36][37][38][39] different materials, nevertheless, here it was adopted because of the good absorption of carbon fiber at the fundamental wavelength of k 5 1,064 nm, the higher pulse power (up to 20 kW), the possibility to have the maximum power (30 W) at all the frequencies and for the lower power consumption compared to the traditional Nd:YAG laser source (120 W considering only the laser source and the cooling system). The latter characteristic is very important when environment as well as process sustainability are considered [16,40].…”

Section: Equipmentmentioning

confidence: 99%

Increasing adhesive bonding of carbon fiber reinforced thermoplastic matrix by laser surface treatment

Genna

Leone

Ucciardello

et al. 2017

Polymer Engineering & Sci

Self Cite

View full text Add to dashboard Cite

In this study, laser surface treatment of CFRP made of PPS thermoplastic matrix by means of Q-switched Yb:YAG fiber laser is investigated with the aim to improve CFRP adhesive bonding. Two set of experimental tests were developed. In the first, laser treatments were executed fixing the average power (Pa) and changing: the pulse power, the scanning speed, the hatch distance, and the scanning strategy. These tests were performed to individuate the laser-material interaction mechanisms and the process window. The treated surfaces were investigated using optical microscopy. It was found that the treatment is able to remove the outer layer of the matrix up to the exposure of underlying reinforcement. However, depending to the released energy, incomplete cleaning or excessive damage may occur. Then, the operating window was experimentally determined. In the second experimental tests, single lap shear tests were performed on samples treated under the most promising process conditions, to verify the laser treatment effectiveness. It was found that the laser treatment, compared to the untreated samples, is able to increase the apparent shear strength up to three times

show abstract

Section: Equipmentmentioning

confidence: 99%

Increasing adhesive bonding of carbon fiber reinforced thermoplastic matrix by laser surface treatment

Genna

Leone

Ucciardello

et al. 2017

Polymer Engineering & Sci

Self Cite

View full text Add to dashboard Cite

show abstract

“…As control factor the pulse power and the grid dimension were adopted. This because in pulsed laser, pulse energy and power play a central role since they determine the laser beam-material interaction mode, amount of worked material, and thermal effect [29][30][31][32]. On the other hand, in order to fill the sample area, a square grid of dimples (where each dimple was created by a single laser shot, Fig.…”

Section: Methodsmentioning

confidence: 99%

Effect of Laser and Plasma Surface Cleaning on Mechanical Properties of Adhesive Bonded Joints

et al. 2015

View full text Add to dashboard Cite

The use of adhesives in place of traditional joining techniques as welding and riveting is becoming increasingly common in structural design. Compared to other conventional joining processes, adhesive bonding offers several advantages: including acoustic insulation, vibration attenuation, structure lightening, corrosion reduction and uniform stress distribution. These benefits can be offset if the surfaces to be bonded are not carefully cleaned, degreased and prepared. Many approaches to surface treatments based on physical or chemical modifications have been developed in the years in order to improve the surface activity. Although widely used and very efficient, these techniques present several disadvantages. Physical methods based on mechanical abrasion are supposed to extend bonding area as they increase the roughness, but cause an extensive degradation to the specimens and they are often not easy to reproduce. On the other hand, chemical treatments are typically used with the aim of modifying both morphology and chemical structure of the substrates layers, but they present serious environmental problems of waste disposal, which has moved investigations to an industrial alternative to these processes. According, the use of energetic methods of surface cleaning, such as laser and plasma cleaning processes have been recently consolidated since they are useful to modify the topmost layers of the substrates, increasing their reactivity, without affecting the bulk material properties. These treatments offer an effective and environment-friendly processing of different materials, providing strong and durable bonds with adhesives through modification of the surface morphology and functionalities. In this study, the effects of laser and low pressure plasma treatments on mechanical properties of adhesive bonded joints has been investigated and compared performing lap-shear tests

show abstract

“…Furthermore, experimental studies were conducted to investigate the physical phenomena and interaction characteristics during laser cutting of electrode for lithium-ion batteries [11,[13][14][15]18]. Lutey et al [30,39] used both a continuous (CW) and pulsed laser to cut electrodes for lithium iron phosphate battery electrodes. The process efficiency and quality were characterized and found that the cutting efficiency increases with shorter pulses, higher velocity, and shorter wavelength [30,39].…”

Section: Introductionmentioning

confidence: 99%

“…Lutey et al [30,39] used both a continuous (CW) and pulsed laser to cut electrodes for lithium iron phosphate battery electrodes. The process efficiency and quality were characterized and found that the cutting efficiency increases with shorter pulses, higher velocity, and shorter wavelength [30,39]. Luetke et al [40] compared a CW and pulsed laser to evaluate the cut quality by defining frazzling and clearance widths.…”

Section: Introductionmentioning

confidence: 99%

The Effect of Compactness on Laser Cutting of Cathode for Lithium-Ion Batteries Using Continuous Fiber Laser

Lee

Suk

2019

Applied Sciences

View full text Add to dashboard Cite

Lithium-Ion Batteries (LIB) are growing in popularity for many applications. Much research has been focusing on battery performance improvement. However, few studies have overcome the disadvantages of the conventional LIB manufacturing processes. Laser cutting of electrodes has been applied. However, the effect of electrodes’ chemical, physical, and geometrical characteristics on the laser cutting has not been considered. This study proposes the effect of compression of cathode on laser cutting for lithium-ion batteries. The kerf width and top width of the specimens with laser irradiation are measured and the material removal energy is obtained. Observations of SEM photographs and absorptivity measurements are conducted. Increasing volume energies causes logarithmic increases in the kerf and top width. It is observed that the compressed cathode forms a wider kerf width than the uncompressed cathode under the same laser parameters. The top width of the uncompressed cathode is wider than the uncompressed cathode. The compression has a favorable effect on uniform cutting and selective removal of an active electrode.

show abstract

Laser cutting of lithium iron phosphate battery electrodes: Characterization of process efficiency and quality

Cited by 43 publications

References 34 publications

Increasing adhesive bonding of carbon fiber reinforced thermoplastic matrix by laser surface treatment

Increasing adhesive bonding of carbon fiber reinforced thermoplastic matrix by laser surface treatment

Effect of Laser and Plasma Surface Cleaning on Mechanical Properties of Adhesive Bonded Joints

The Effect of Compactness on Laser Cutting of Cathode for Lithium-Ion Batteries Using Continuous Fiber Laser

Contact Info

Product

Resources

About