Lithium-Ion Desolvation Induced by Nitrate Additives Reveals New Insights into High Performance Lithium Batteries
Emwas, Abdul-Hamid M.
Hedhili, Mohamed N.
Anthopoulos, Thomas D.
KAUST DepartmentChemical Science Program
KAUST Catalysis Center (KCC)
KAUST Solar Center (KSC)
Material Science and Engineering
Material Science and Engineering Program
Physical Science and Engineering (PSE) Division
Polymer Synthesis Laboratory
Embargo End Date2022-04-02
Permanent link to this recordhttp://hdl.handle.net/10754/668497
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AbstractElectrolyte additives have been widely used to address critical issues in current metal (ion) battery technologies. While their functions as solid electrolyte interface forming agents are reasonably well-understood, their interactions in the liquid electrolyte environment remain rather elusive. This lack of knowledge represents a significant bottleneck that hinders the development of improved electrolyte systems. Here, the key role of additives in promoting cation (e.g., Li+) desolvation is unraveled. In particular, nitrate anions (NO3−) are found to incorporate into the solvation shells, change the local environment of cations (e.g., Li+) as well as their coordination in the electrolytes. The combination of these effects leads to effective Li+ desolvation and enhanced battery performance. Remarkably, the inexpensive NaNO3 can successfully substitute the widely used LiNO3 offering superior long-term stability of Li+ (de-)intercalation at the graphite anode and suppressed polysulfide shuttle effect at the sulfur cathode, while enhancing the performance of lithium–sulfur full batteries (initial capacity of 1153 mAh g−1 at 0.25C) with Coulombic efficiency of ≈100% over 300 cycles. This work provides important new insights into the unexplored effects of additives and paves the way to developing improved electrolytes for electrochemical energy storage applications.
CitationWahyudi, W., Ladelta, V., Tsetseris, L., Alsabban, M. M., Guo, X., Yengel, E., … Ming, J. (2021). Lithium-Ion Desolvation Induced by Nitrate Additives Reveals New Insights into High Performance Lithium Batteries. Advanced Functional Materials, 2101593. doi:10.1002/adfm.202101593
SponsorsW.W. and V.L. contributed equally to this work. This work was supported by the King Abdullah University of Science and Technology (KAUST)and KAUST Solar Centre. L.T. acknowledges computational time at the GRNET HPC facility ARIS through project pr007037-STEM-2. J.M. also thanks the great support from the National Natural Science Foundation of China (21978281).
JournalAdvanced Functional Materials