Temperature-dependent interphase formation and Li+ transport in lithium metal batteries

Abstract High-performance Li-ion/metal batteries working at a low temperature (i.e., <−20 °C) are desired but hindered by the sluggish kinetics associated with Li + transport and charge transfer. Herein, the temperature-dependent Li + behavior during Li plating is profiled by various characterization techniques, suggesting that Li + diffusion through the solid electrolyte interface (SEI) layer is the key rate-determining step. Lowering the temperature not only slows down Li + transport, but also alters the thermodynamic reaction of electrolyte decomposition, resulting in different reaction pathways and forming an SEI layer consisting of intermediate products rich in organic species. Such an SEI layer is…

• NN
  National Natural Science Foundation of China

  Awards: 52172257, 22005334
• CA
  Chinese Academy of Sciences
• NK
  National Key Research and Development Program of China

  Award: 2022YFB2502200