Localized concentration reversal of lithium during intercalation into nanoparticles.

ABSTRACT: Nanoparticulate electrodes, such as Li _x FePO₄, have unique advantages over their microparticulate counterparts for the applications in Li-ion batteries because of the shortened diffusion path and access to nonequilibrium routes for fast Li incorporation, thus radically boosting power density of the electrodes. However, how Li intercalation occurs locally in a single nanoparticle of such materials remains unresolved because real-time observation at such a fine scale is still lacking. We report visualization of local Li intercalation via solid-solution transformation in individual Li _x FePO₄ nanoparticles, enabled by probing sub-angstrom changes in the lattice spacing in situ. The real-time observation reveals inhomogeneous intercala

SUBMITTER: Zhang W 

PROVIDER: S-EPMC5766330 | biostudies-literature | 2018 Jan

REPOSITORIES: biostudies-literature