%0 Journal Article
%A Kühn, Sebastian P.
%A Pfeiffer, Felix
%A Bela, Marlena
%A Rodehorst, Uta
%A Weintz, Dominik
%A Stan, Marian
%A Baghernejad, Masoud
%A Winter, Martin
%A Cekic-Laskovic, Isidora
%T Back to the basics: Advanced understanding of the as-defined solid electrolyte interphase on lithium metal electrodes
%J Journal of power sources
%V 549
%@ 0378-7753
%C New York, NY [u.a.]
%I Elsevier
%M FZJ-2023-05467
%P 232118 -
%D 2022
%X The design and control of the solid electrolyte interphase (SEI) is essential for the implementation ofrechargeable lithium metal based batteries and has been a major research theme of lithium metal electrodes forover 50 years. However, research on an as-defined SEI is challenging due to the inevitable presence of a nativepassivation layer (NPL), commonly contaminating an in situ formed SEI and its characteristics. Herein we presentan original study on an uncontaminated SEI being an exclusive reaction product of lithium and a liquid aproticelectrolyte, highlighting the largely negative influence of the NPL on different SEI characteristics and functionaladditive evaluation. A preformed as-defined SEI (pSEI) was generated by an in-house designed advanced pretreatmentmethod, ensuring high reproducibility and exclusion of the NPL by cutting and pressing lithiummetal in solution/electrolyte. The implementation of a pSEI allows for a systematic study and an uncloudedcomparison of the two common functional additives vinylene carbonate (VC) and fluoroethylene carbonate (FEC)in an equal molar setting. The introduction of an as-defined SEI allowed to clearly distinguish between enhancinginfluence on the SEI characteristics and full cell performance by FEC and the largely negative effect of VC ondifferent SEI characteristics.
%F PUB:(DE-HGF)16
%9 Journal Article
%U <Go to ISI:>//WOS:000863131200004
%R 10.1016/j.jpowsour.2022.232118
%U https://juser.fz-juelich.de/record/1019520