Role of Salt Concentration in Stabilizing Charged Ni-Rich Cathode Interfaces in Li-Ion Batteries.

ABSTRACT: The cathode-electrolyte interphase (CEI) in Li-ion batteries plays a key role in suppressing undesired side reactions while facilitating Li-ion transport. Ni-rich layered cathode materials offer improved energy densities, but their high interfacial reactivities can negatively impact the cycle life and rate performance. Here we investigate the role of electrolyte salt concentration, specifically LiPF₆ (0.5-5 m), in altering the interfacial reactivity of charged LiN_0.8Mn_0.1Co_0.1O₂ (NMC811) cathodes in standard carbonate-based electrolytes (EC/EMC vol %/vol % 3:7). Extended potential holds of NMC811/Li₄Ti₅O₁₂ (LTO) cells reveal that the parasitic electrolyte oxidation currents observed are strongly

SUBMITTER: Phelan CME 

PROVIDER: S-EPMC11008099 | biostudies-literature | 2024 Apr

REPOSITORIES: biostudies-literature