Phys.org  June 8, 2024 Understanding how particle features influence Li and sodium (Na) co-intercalation is crucial for system design and enhancing Li selectivity. A team of researchers in the US (University of Chicago, Illinois Institute of Technology, Argonne National Laboratory, University of New York at Buffalo) investigated a series of FePO4 particles with various features and revealed the importance of harnessing kinetic and chemo-mechanical barrier difference between lithiation and sodiation to promote selectivity. The thermodynamic preference of FePO4 provided baseline of selectivity while the particle features were critical to induce different kinetic pathways and barriers, resulting in different Li to […]