Stabilizing the cathode interphase of LNMO using an ionic‐liquid based electrolyte
نویسندگان
چکیده
The ionic liquid (IL)-based electrolyte comprising 1.2 M lithium bis(fluorosulfonyl)imide (LiFSI) in N-Propyl-N-methylpyrrolidinium (PYR13FSI) (ILE) has been evaluated as a suitable system for the high-voltage cathode material LiNi0.5-xMn1.5+xO4 (LNMO) when cycled vs. graphite anodes. oxidative stability of ILE was by linear sweep voltammetry (LSV) and synthetic charge-discharge profile (SCPV) found to exceed that state-of-the-art 1 LiPF6 1:1 ethylene carbonate (EC):diethylcarbonate (DEC) (LP40). Improved cycling performance both at 20 °C 45 LNMO||graphite full cells with IL electrolyte. X-ray photoelectron spectroscopy (XPS) analysis showed robust predominantly inorganic surface layers were formed on LNMO using ILE, which stabilized electrode. Although high viscosity limits rate 20°C, this is promising alternative use lithium-ion batteries (LiBs) cathodes such LNMO, especially elevated temperatures.
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ژورنال
عنوان ژورنال: Batteries & supercaps
سال: 2023
ISSN: ['2566-6223']
DOI: https://doi.org/10.1002/batt.202300085