TY  - JOUR
AU  - Ghaur, Adjmal
AU  - Pfeiffer, Felix
AU  - Diddens, Diddo
AU  - Peschel, Christoph
AU  - Dienwiebel, Iris
AU  - Du, Leilei
AU  - Profanter, Laurin
AU  - Weiling, Matthias
AU  - Winter, Martin
AU  - Placke, Tobias
AU  - Nowak, Sascha
AU  - Baghernejad, Masoud
TI  - Molecular‐Cling‐Effect of Fluoroethylene Carbonate Characterized via Ethoxy(pentafluoro)cyclotriphosphazene on SiOx/C Anode Materials – A New Perspective for Formerly Sub‐Sufficient SEI Forming Additive Compounds
JO  - Small
VL  - 19
IS  - 44
SN  - 1613-6810
CY  - Weinheim
PB  - Wiley-VCH
M1  - FZJ-2023-02628
SP  - 2302486
PY  - 2023
AB  - Effective electrolyte compositions are of primary importance in raising the performance of lithium-ion batteries (LIBs). Recently, fluorinated cyclic phosphazenes in combination with fluoroethylene carbonate (FEC) have been introduced as promising electrolyte additives, which can decompose to form an effective dense, uniform, and thin protective layer on the surface of electrodes. Although the basic electrochemical aspects of cyclic fluorinated phosphazenes combined with FEC were introduced, it is still unclear how these two compounds interact constructively during operation. This study investigates the complementary effect of FEC and ethoxy(pentafluoro)cyclotriphosphazene (EtPFPN) in aprotic organic electrolyte in LiNi0.5Co0.2Mn0.3O ∥ SiOx/C full cells. The formation mechanism of lithium ethyl methyl carbonate (LEMC)-EtPFPN interphasial intermediate products and the reaction mechanism of lithium alkoxide with EtPFPN are proposed and supported by Density Functional Theory calculations. A novel property of FEC is also discussed here, called molecular-cling-effect (MCE). To the best knowledge, the MCE has not been reported in the literature, although FEC belongs to one of the most investigated electrolyte additives. The beneficial MCE of FEC toward the sub-sufficient solid-electrolyte interphase forming additive compound EtPFPN is investigated via gas chromatography-mass spectrometry, gas chromatography high resolution-accurate mass spectrometry, in situ shell-isolated nanoparticle-enhanced Raman spectroscopy, and scanning electron microscopy.
LB  - PUB:(DE-HGF)16
C6  - 37403278
UR  - <Go to ISI:>//WOS:001022760900001
DO  - DOI:10.1002/smll.202302486
UR  - https://juser.fz-juelich.de/record/1009089
ER  -