Revealing the aging process of solid electrolyte interphase on SiO_x anode.

ABSTRACT: As one of the most promising alternatives to graphite negative electrodes, silicon oxide (SiO_x) has been hindered by its fast capacity fading. Solid electrolyte interphase (SEI) aging on silicon SiO_x has been recognized as the most critical yet least understood facet. Herein, leveraging 3D focused ion beam-scanning electron microscopy (FIB-SEM) tomographic imaging, we reveal an exceptionally characteristic SEI microstructure with an incompact inner region and a dense outer region, which overturns the prevailing belief that SEIs are homogeneous structure and reveals the SEI evolution process. Through combining nanoprobe and electron energy loss spectroscopy (EELS), it is also discovered that the electronic conductivity of thick SEI relies on the percolation network wit

SUBMITTER: Qian G 

PROVIDER: S-EPMC10539371 | biostudies-literature | 2023 Sep

REPOSITORIES: biostudies-literature