Ultrafast laser ablation of high-voltage cathodes using GHz burst mode operation

A key for developing high-energy and high-power lithium-ion batteries is the implementation of optimized material configurations and electrode architectures. A promising approach is the use of cathodes containing the high-voltage spinel LiNi_0.5Mn_1.5O₄ (LNMO) as active material and enhance their electrochemical performance by implementing a three-dimensional (3D) electrode architecture created through laser ablation. A high throughput of precisely fabricated 3D electrode geometries can be realized by using Ultrashort Pulsed (USP) laser radiation in combination with burst mode operation. In this work, the ablation characteristics of a line structuring of high-voltage LNMO cathodes in single pulse mode and GHz burst mode are analyzed and compared to identify optimized laser structuring parameters.