Advanced architectures for 3D-structured lithium-ion battery electrodes via precession module

With a novel precession module and five-axis stage, this research investigates the effect of varying taper angle on the performance of 3D lithium-ion batteries. Diverging, parallel and converging side walls are manufactured via femtosecond laser ablation, using a precession module, allowing the variation of incident angle of the laser beam onto the sample. This is characterized and verified by laser scanning microscopy, providing three-dimensional images of the ablated features. The highly promising lithium manganese iron phosphate (LMFP) is used as cathode material. The performance of different structures is tested electrochemically in 2032 half-cell configuration. The accessible capacity at different charging speeds (up to charging rates of 5C), as well as the long-term stability are tested and the different structures are compared.