A new article published in Nano Letters by our group shows the direct visualization by x-ray ptychography of correlations between chemical phase and mechanical changes in LiFePO4 plates of  a range of particle sizes, upon partial delithiation. It establishes mechanics as a primary driver in the superior performance of nanoscale cathode particles, which did not fracture as a result of the reaction. Young-Sang worked his X-ray imaging magic once again, with the help of Chunjoong, now a former member of the Cabana group, and in close partnership with researchers at the Advanced Light Source. Bravo, Young-Sang and Chunjoong!