09-25-2017, HOUSTON, TX

Finally!

An interesting study on two-dimensional Li diffusion behaviors and hybrid phase transformation kinetics in olivine lithium iron phosphate (LFP) electrode is accepted by Nature Communications. Here we combine operando hard X-ray spectroscopic imaging and phase-field modeling to elucidate the delithiation dynamics of single-crystal LFP microrods with long-axis along the [010] direction. This study not only presents the first direct proof of the previously predicted Surface-Reaction-Limited transformation behavior by Singh, Ceder and Bazant, but reveals a more subtle and complete picture of phase transformations in LFP and intercalation compounds in general. This is also my first paper on tuning interrelation between surface reaction kinetics and bulk diffusion behaviors by engineering defects and dislocations in phase-changing electrodes.