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In Situ Engineering of the Electrode–Electrolyte Interface for Stabilized Overlithiated Cathodes

  • Author(s): Evans, T
  • Piper, DM
  • Sun, H
  • Porcelli, T
  • Kim, SC
  • Han, SS
  • Choi, YS
  • Tian, C
  • Nordlund, D
  • Doeff, MM
  • Ban, C
  • Cho, SJ
  • Oh, KH
  • Lee, SH
  • et al.
Abstract

Researchers demonstrate electrode–electrolyte interactions known to accelerate phase change in the lithium–manganese-rich (LMR) system. Leveraging the understandings of LMR interfacial Behavior, the researchers employ a unique electrolyte composition to form a cathode–electrolyte interface (CEI) that allows for the improved long-term capacity and energy retention of the LMR cathode. Our novel CEI is formed in situ through the oxidative decomposition of a room temperature ionic liquid (RTIL) electrolyte doped with a sacrificial fluorinated salt additive.

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