Thick film electrodes in lithium-ion cells are complex multi-material systems with defined material components, grain sizes, porosities, and pore size distributions in the micrometer and sub-micrometer ranges. The development of three-dimensional (3D) cell architectures for electrodes in lithium-ion batteries is one promising approach to overcome limitations in lithium-ion diffusion kinetics, high interelectrode ohmic resistances, and mechanical stresses due to high volume changes during battery operation. 3D battery architectures can realize large areal energy capacities while maintaining high power densities at the same time.
Laser materials processing in manufacturing of Li-ion batteries is a rather new technological approach which enables rapid manufacturing, high reliability, and a reduction of production costs. Laser cutting and welding processes for batteries are already available for advanced industrial production. Laser micro-structuring of battery materials has a huge impact on battery performance and an up-scaling for industrial production is investigated. Advanced laser generated 3D surface architectures in battery materials improve Li-ion diffusion kinetics. ... mehr