%0 Journal Article
%A Yan, Peng
%A Shevchuk, Mykhailo
%A Wölke, Christian
%A Pfeiffer, Felix
%A Berghus, Debbie
%A Baghernejad, Masoud
%A Röschenthaler, Gerd-Volker
%A Winter, Martin
%A Cekic-Laskovic, Isidora
%T Blended Salt Electrolyte Design for Enhanced NMC811||Graphite Cell Performance
%J Small structures
%V 5
%N 4
%@ 2688-4062
%C Weinheim
%I Wiley-VCH
%M FZJ-2024-00433
%P 2300425
%D 2024
%X The high energy density, nickel-rich layered cathode material LiNi0.8Mn0.1Co0.1O2(NMC811) is recognized as a promising candidate for next-generation batterychemistries. However, due to their structural and interfacial instability, nickel-richNMC cathodes still face a number of challenges in practical application. For thisreason, the design and development of novel electrolyte formulations, able tostabilize the nickel-rich cathode|electrolyte interface, are highly demanded. In thiswork, a novel electrolyte is developed using lithium (difluoromethanesulfonyl)(trifluoromethanesulfonyl)imide (LiDFTFSI) and lithium hexafluorophosphate(LiPF6) as salt blend in an organic carbonate-solvent based solvent mixture. Thepresence of LiDFTFSI notably enhances the electrochemical performance of theresulting NMC811||graphite cells. Further advancement of the considered cellchemistry is achieved by introducing the well-known functional electrolyteadditive vinylene carbonate (VC), which was found to feature a synergistic effectwith LiDFTFSI. The formation of a homogenous, effective, and robust solidelectrolyte interphase (SEI) as well as cathode electrolyte interphase (CEI) on thecorresponding electrodes resulted in superior electrochemical performance.
%F PUB:(DE-HGF)16
%9 Journal Article
%U <Go to ISI:>//WOS:001130274600001
%R 10.1002/sstr.202300425
%U https://juser.fz-juelich.de/record/1020973