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@ARTICLE{Yan:1025063,
      author       = {Yan, Peng and Shevchuk, Mykhailo and Woelke, Christian and
                      Pfeiffer, Felix and Berghus, Debbie and Baghernejad, Masoud
                      and Röschenthaler, Gerd-Volker and Winter, Martin and
                      Cekic-Laskovic, Isidora},
      title        = {{S}ynergistic {E}ffect of {L}ithium
                      (difluoromethanesulfonyl)(trifluoromethanesulfonyl){I}mide
                      ({L}i{DFTFSI}) and {V}inylene {C}arbonate ({VC}) on {H}igh
                      {P}erformance of {NMC}811║{G}raphite {C}ells},
      journal      = {Meeting abstracts},
      volume       = {MA2023-02},
      number       = {8},
      issn         = {1091-8213},
      address      = {Pennington, NJ},
      publisher    = {Soc.},
      reportid     = {FZJ-2024-02651},
      pages        = {3225 - 3225},
      year         = {2023},
      abstract     = {Lithium-ion batteries (LIBs) have gained increasing
                      importance in energy storage systems, driven by the growing
                      demands of grid storage, automotive, and portable consumer
                      applications. To meet the need for high energy density
                      batteries, one promising approach involves the utilization
                      of high capacity layered transition metal oxide cathodes,
                      such as nickel-rich LiNi0.8Mn0.1Co0.1O2 (NMC811), which can
                      deliver a high reversible specific capacity of over 180
                      mAh·g-1[1,2]. However, due to the structural and
                      interfacial instability[3], nickel-rich NMC cathode still
                      faces challenges in long-term galvanostatic cycling. For
                      these reasons, design of novel electrolyte formulations,
                      which enable formation of an effective cathode electrolyte
                      interphase (CEI), is highly desirable. Recent studies have
                      highlighted the cross-talk between the cathode and anode,
                      indicating that the evolution of the solid electrolyte
                      interphase (SEI) can impact the formation of the CEI[4].
                      Thus, establishing an effective SEI/CEI pair is essential
                      for achieving long-term cycling of nickel-rich NMC
                      cathode-based cells. Electrolyte optimization plays a
                      crucial role in facilitating the formation of a desirable
                      SEI/CEI pair, leading to an improved cell performance and
                      longevity. Lithium
                      (difluoromethanesulfonyl)(trifluoro-methanesulfonyl)imide
                      (LiDFTFSI) has proven to be promising in
                      solid-polymer-electrolyte batteries due to the good SEI/CEI
                      formation ability and suppressed Al-dissolution[5].
                      Additionally, LiDFTFSI exhibits also good compatibility with
                      Li-metal batteries[6], heralding promising applications in
                      Li-ion batteries. However, there is lack of systematic
                      research investigating the potential impact of LiDFTFSI on
                      the cathode as well as on resulting CEI formation and
                      dynamics.In this work, we demonstrated enhanced
                      galvanostatic cycling performance of NMC811||graphite cells
                      achieved by utilizing LiDFTFSI and lithium
                      hexafluorophosphate (LiPF6) in a blended salt organic
                      carbonate-based electrolyte formulation. Comprehensive
                      electrochemical and post mortem analysis revealed that the
                      LiDFTFSI alone can effectively mitigate the structural
                      changes in the NMC811 electrode by facilitating the
                      formation of modified CEI. However, the continued growth of
                      an inhomogeneous CEI, caused by the cross-talk effect
                      between electrodes, adversely affected long-term cycling
                      stability. To address this, vinylene carbonate (VC) was
                      introduced to the electrolyte. Synergistic effect with
                      LiDFTFSI leads to the formation of effective and uniform SEI
                      and CEI. As a result, 720 charge/discharge cycles were
                      achieved in NMC811||graphite cells with LiDFTFSI and VC
                      containing electrolytes at 1C while maintaining $80\%$
                      state-of-health $(SOH80\%).References[1]$ R. Schmuch, R.
                      Wagner, G. Hörpel, T. Placke, M. Winter, Nature Energy2018,
                      3, 267–278.[2] W. Xue, M. Huang, Y. Li, Y. G. Zhu, R. Gao,
                      X. Xiao, W. Zhang, S. Li, G. Xu, Y. Yu, P. Li, J. Lopez, D.
                      Yu, Y. Dong, W. Fan, Z. Shi, R. Xiong, C.-J. Sun, I. Hwang,
                      W.-K. Lee, Y. Shao-Horn, J. A. Johnson, J. Li, Nature
                      Energy2021, 6, 495–505.[3] K. Guo, S. Qi, H. Wang, J.
                      Huang, M. Wu, Y. Yang, X. Li, Y. Ren, J. Ma, Small
                      Science2022, 2, 2100107.[4] S. Fang, D. Jackson, M. L.
                      Dreibelbis, T. F. Kuech, R. J. Hamers, Journal of Power
                      Sources2018, 373, 184–192.[5] H. Zhang, U. Oteo, X. Judez,
                      G. G. Eshetu, M. Martinez-Ibañez, J. Carrasco, C. Li, M.
                      Armand, Joule2019, 3, 1689–1702.[6] L. Qiao, U. Oteo, M.
                      Martinez-Ibañez, A. Santiago, R. Cid, E. Sanchez-Diez, E.
                      Lobato, L. Meabe, M. Armand, H. Zhang, Nat. Mater.2022, 21,
                      455–462.},
      cin          = {IEK-12},
      ddc          = {540},
      cid          = {I:(DE-Juel1)IEK-12-20141217},
      pnm          = {1221 - Fundamentals and Materials (POF4-122)},
      pid          = {G:(DE-HGF)POF4-1221},
      typ          = {PUB:(DE-HGF)16},
      doi          = {10.1149/MA2023-0283225mtgabs},
      url          = {https://juser.fz-juelich.de/record/1025063},
}