Competitive Coordination of Ternary Anions Enabling Fast Li‐Ion Desolvation for Low‐Temperature Lithium Metal Batteries

Abstract Lithium metal batteries (LMBs) working at subzero temperatures are plagued by severe restrictions from the increased energy barrier of Li‐ion migration and desolvation. Herein, a competitive coordination strategy based on the ternary‐anion (TA) coupling of PF 6 − , TFSI − , and NO 3 − toward Li + to achieve an anti‐freezing electrolyte with rapid kinetics is proposed. Computational and spectroscopic analyses reveal that the repulsive interaction among three anions and the preponderant coordination of the Li + ‐NO 3 − further weaken the involvement degree of other anions in the Li + solvation structure. As a result, the formulated TA electrolyte exhibits low binding energy of Li + ‐anions (−4.62 eV),…

• CN
  China National Funds for Distinguished Young Scientists

  Award: 21925503
• FR
  Fundamental Research Funds for the Central Universities