LiF‐Rich Cathode Electrolyte Interphases Homogenizing Li + Fluxes toward Stable Interface in Li‐Rich Mn‐Based Cathodes

Abstract Constructing a stable cathode‐electrolyte interphase (CEI) is crucial to enhance the battery performance of Li‐rich Mn‐based oxide (LMO) cathodes. To achieve an ideal CEI, a gas‐phase fluorination technique is proposed to pre‐structure a robust LiF layer (≈1 nm) on the LMO surface. The designed LiF layer effectively modulates the electric field distribution on the electrode surface and mitigates undesirable side reactions between the electrode and electrolyte, thereby promoting the formation of a uniform LiF‐rich CEI layer on the LMO‐F‐1. The optimized CEI facilitates homogeneous Li + fluxes across the electrode surface and enhances Li + diffusion in the electrode during (de)intercalation,…

• NN
  National Natural Science Foundation of China

  Awards: 22279101, 52272237, 52072298