Enabling a non-flammable methyl(2,2,2-trifluoroethyl) carbonate electrolyte in NMC622-graphite Li-ion cells by electrode pre-passivation

DOI: 10.1039/D4YA00052H

Authors: Matilde Longhini (Uppsala University; University of Padova) , Florian Gebert (Uppsala University) , Fosca Conti (University of Padov) , Andrew J. Naylor (Uppsala University)
Co-authored by industrial partner: No

Type: Journal Paper
Journal: Energy Advances

State: Published (Approved)
Published: April 2024
Diamond Proposal Number(s): 30357

Abstract: Novel lithium-ion battery electrolytes often exhibit poor electrochemical stability against typical commercial layered oxide and graphite electrodes. Pre-passivating the electrodes prior to cell assembly with an electrically insulating, ionically conductive solid-electrolyte interphase (SEI) is one innovative strategy for stabilising systems with otherwise unusable electrolytes. Here, methyl(2,2,2-trifluoroethyl) carbonate (FEMC), a promising non-flammable electrolyte solvent that is generally unstable against graphite, is utilised after pre-passivation of electrodes with a state-of-the-art carbonate-based electrolyte. A significant improvement in performance is observed compared with the untreated electrodes. Hard X-ray photoelectron spectroscopy was used to probe the interphase layer composition.

Diamond Keywords: Batteries; Lithium-ion

Subject Areas: Materials, Chemistry, Energy


Instruments: I09-Surface and Interface Structural Analysis

Added On: 11/04/2024 08:54

Documents:
d4ya00052h.pdf

Discipline Tags:

Surfaces Energy Storage Energy Physics Physical Chemistry Energy Materials Chemistry Materials Science Chemical Engineering Engineering & Technology

Technical Tags:

Spectroscopy X-ray Photoelectron Spectroscopy (XPS) Hard X-ray Photoelectron Spectroscopy (HAXPES)