Cathode Kinetics Evaluation in Lean-Electrolyte Lithium–Sulfur Batteries

Lithium–sulfur (Li–S) batteries afford great promise on achieving practical high energy density beyond lithium-ion batteries. Lean-electrolyte conditions constitute the prerequisite for achieving high-energy-density Li–S batteries but inevitably deteriorates battery performances, especially the sulfur cathode kinetics. Herein, the polarizations of the sulfur cathode are systematically decoupled to identify the key kinetic limiting factor in lean-electrolyte Li–S batteries. Concretely, an electrochemical impedance spectroscopy combined galvanostatic intermittent titration technique method is developed to decouple the cathodic polarizations into activation, concentration, and ohmic parts. Therein, activation…

• NN
  National Natural Science Foundation of China

  Awards: 22209010, 22109007
• TU
  Tsinghua University
• NS
  Natural Science Foundation of Beijing Municipality

  Award: JQ20004
• BI
  Beijing Institute of Technology Research Fund Program for Young Scholars
• NK
  National Key Research and Development Program of China

  Award: 2021YFB2400300