Rapid acquisition of operando X-ray point diffraction on LMFP Li-ion coin and pouch cells in through plane geometry

The development of novel cathodes is vital to the design of batteries. LiMnxFe1-xPO4, (LMFP) cathodes are a particularly promising candidate for boosting the energy density and safety towards next generation Li-ion batteries. Preliminary operando lab XRD study on LMFP pouch cells shows that the LMFP electrode undergoes complex solid solution and phase transition mechanisms during the delithiation process. Utilizing the ID15A beamline, we expect to be able to thoroughly study the energy storage mechanisms of LMFP cathode material at different C-rates (C/3 to 3C) with different thickness (40 and 80 μm) of electrodes. Moreover, we expect to map the SoC through the thickness of the electrode by performing rapid acquisition X-ray point diffraction that performs a vertical raster through the electrode collecting operando 2D diffraction patterns, detailing how the lattice response changes during the cycling of cells with different thickness electrodes and different ageing stages.