Tuning the Solid Electrolyte Interphase for Selective Li- and Na-Ion Storage in Hard Carbon. Academic Article uri icon

abstract

  • Solid-electrolyte interphase (SEI) films with controllable properties are highly desirable for improving battery performance. In this paper, a combined experimental and theoretical approach is used to study SEI films formed on hard carbon in Li- and Na-ion batteries. It is shown that a stable SEI layer can be designed by precycling an electrode in a desired Li- or Na-based electrolyte, and that ionic transport can be kinetically controlled. Selective Li- and Na-based SEI membranes are produced using Li- or Na-based electrolytes, respectively. The Na-based SEI allows easy transport of Li ions, while the Li-based SEI shuts off Na-ion transport. Na-ion storage can be manipulated by tuning the SEI layer with film-forming electrolyte additives, or by preforming an SEI layer on the electrode surface. The Na specific capacity can be controlled to <25 mAh g-1 ; 1/10 of the normal capacity (250 mAh g-1 ). Unusual selective/preferential transport of Li ions is demonstrated by preforming an SEI layer on the electrode surface and corroborated with a mixed electrolyte. This work may provide new guidance for preparing good ion-selective conductors using electrochemical approaches.

published proceedings

  • Adv Mater

author list (cited authors)

  • Soto, F. A., Yan, P., Engelhard, M. H., Marzouk, A., Wang, C., Xu, G., ... Li, X.

citation count

  • 120

complete list of authors

  • Soto, Fernando A||Yan, Pengfei||Engelhard, Mark H||Marzouk, Asma||Wang, Chongmin||Xu, Guiliang||Chen, Zonghai||Amine, Khalil||Liu, Jun||Sprenkle, Vincent L||El-Mellouhi, Fedwa||Balbuena, Perla B||Li, Xiaolin

publication date

  • May 2017

publisher