TY  - JOUR
AU  - Kühn, Sebastian P.
AU  - Pfeiffer, Felix
AU  - Bela, Marlena
AU  - Rodehorst, Uta
AU  - Weintz, Dominik
AU  - Stan, Marian
AU  - Baghernejad, Masoud
AU  - Winter, Martin
AU  - Cekic-Laskovic, Isidora
TI  - Back to the basics: Advanced understanding of the as-defined solid electrolyte interphase on lithium metal electrodes
JO  - Journal of power sources
VL  - 549
SN  - 0378-7753
CY  - New York, NY [u.a.]
PB  - Elsevier
M1  - FZJ-2023-05467
SP  - 232118 -
PY  - 2022
AB  - 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.
LB  - PUB:(DE-HGF)16
UR  - <Go to ISI:>//WOS:000863131200004
DO  - DOI:10.1016/j.jpowsour.2022.232118
UR  - https://juser.fz-juelich.de/record/1019520
ER  -