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<p>Laser notching is emerging as a promising technology for cutting lithium-ion battery electrodes due to its high precision and fast processing speed. However, laser cutting of the cathode components such as LiNi<sub>0.6</sub>Mn<sub>0.2</sub>Co<sub>0.2</sub>O<sub>2</sub> (NCM622) is challenging due to the complex characteristics of the active material. In this study, we evaluated the nanosecond pulsed laser cutting process for the NCM622 electrode. The cutting qualities including heat-affected zone (HAZ), top width, kerf width, burr size, and dross size were qualitatively and quantitatively analyzed with variations in process parameters. The size of the HAZ exhibited the largest variation with changes in laser power, and the spatter generated during processing induced the formation of a linear HAZ around the reaction zone. Quantitative analysis indicated that laser power had the greatest influence on cutting quality among the process parameters, whereas the effect of pulse duration was generally minimal. Scan speed and pulse repetition rate considerably affected the top width and kerf width, respectively, while their influence on other characteristics was negligible. Based on extensive evaluations and analyses, this study provides key insights into factors considered for the industrial application of laser cutting for NCM electrodes.</p>

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An Investigation of Nanosecond Laser Cutting Characteristics of a Lithium-Ion Battery Cathode Composed of LiNi0.6Co0.2Mn0.2O2 (NCM622)

  • 期刊论文

  • 发表日期：

    2026年3月17日

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  • Gihwan Ryu,
  • Joonghan Shin

摘要

Laser notching is emerging as a promising technology for cutting lithium-ion battery electrodes due to its high precision and fast processing speed. However, laser cutting of the cathode components such as LiNi0.6Mn0.2Co0.2O2 (NCM622) is challenging due to the complex characteristics of the active material. In this study, we evaluated the nanosecond pulsed laser cutting process for the NCM622 electrode. The cutting qualities including heat-affected zone (HAZ), top width, kerf width, burr size, and dross size were qualitatively and quantitatively analyzed with variations in process parameters. The size of the HAZ exhibited the largest variation with changes in laser power, and the spatter generated during processing induced the formation of a linear HAZ around the reaction zone. Quantitative analysis indicated that laser power had the greatest influence on cutting quality among the process parameters, whereas the effect of pulse duration was generally minimal. Scan speed and pulse repetition rate considerably affected the top width and kerf width, respectively, while their influence on other characteristics was negligible. Based on extensive evaluations and analyses, this study provides key insights into factors considered for the industrial application of laser cutting for NCM electrodes.