Electrolyte Reactions with the Surface of High Voltage LiNi0.5Mn1.5O4 Cathodes for Lithium-Ion Batteries

By Li Yang, B. Ravdel, B. Lucht. 2010

472 citations recorded by the source corpus.

The reaction of an electrolyte (1 M LiPF 6 in ethylene carbonate/dimethyl carbonate/diethyl carbonate, 1:1:1) with the surface of LiNi 0.5 Mn 1.5 O 4 at various voltages (4.0-5.3 V vs Li) was investigated. Coin cells (Li/LiNi 0.5 Mn 1.5 O 4 ) stored at low voltage (4.0-4.5 V vs Li) show low residual current, and ex situ analysis of the LiNi 0.5 Mn 1.5 O 4 surface by X-ray photoelectron spectroscopy (XPS) and IR spectroscopy suggests low concentrations of electrolyte decomposition products. Coin cells (Li/LiNi 0.5 Mn 1.5 O 4 ) stored at high voltage (4.7-5.3 V vs Li) show increased residual current, and ex situ analysis of the cathode surface by XPS and IR supports the presence of poly(ethylenecarbonate).

Subfields: Automotive Engineering, Electrical and Electronic Engineering

View Paper: https://www.semanticscholar.org/paper/56792513756640445e5efccfec5be198b72e99b9