The Impact of Li Grain Size on Coulombic Efficiency in Li Batteries.

ABSTRACT: One of the most promising means to increase the energy density of state-of-the-art lithium Li-ion batteries is to replace the graphite anode with a Li metal anode. While the direct use of Li metal may be highly advantageous, at present its practical application is limited by issues related to dendrite growth and low Coulombic efficiency, CE. Here operando electrochemical scanning transmission electron microscopy (STEM) is used to directly image the deposition/stripping of Li at the anode-electrolyte interface in a Li-based battery. A non-aqueous electrolyte containing small amounts of H₂O as an additive results in remarkably different deposition/stripping properties as compared to the "dry" electrolyte when operated under identical electrochemical conditions. The electrolyte wit

SUBMITTER: Mehdi BL 

PROVIDER: S-EPMC5050435 | biostudies-literature | 2016 Oct

REPOSITORIES: biostudies-literature