Advances in in situ powder diffraction of battery materials: a case study of the new beamline P02.1 at DESY, Hamburg

It is shown that a combination of the new beamline P02.1 at PETRA III (DESY, Hamburg) with a new cell design exhibits outstanding conditions for in situ battery characterization, even for low-symmetry complex crystal structures. Crucial points like instrumental resolution, available q range and measurement time per pattern for excellent counting statistics are investigated. It is demonstrated that the latter can be reduced to the region of milliseconds.