University of Münster
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Aging Stability of Li2FeSiO4 Polymorphs in LiPF6 Containing Organic Electrolyte for Lithium-Ion Batteries

Dippel C, Krüger S, Kraft V, Nowak S, Winter M, Li J

Research article (journal) | Peer reviewed

Abstract

The aging stability of several Li2FeSiO4 (LFS) polymorphs in LiPF6-based organic carbonate solvent electrolyte at elevated temperature was investigated. The different LFS polymorphs were obtained by hydrothermal reaction and subsequent annealing at different temperatures. In addition, a carbon-coated sample was prepared. The samples were aged separately from each other at 60°C in LiPF6-based organic electrolyte for 10 days and analyzed afterwards. The characterization of the residual powder by X-ray diffraction (XRD) and energy-dispersive X-ray spectroscopy (EDX) reveals a different aging behavior depending on the structure of the LFS polymorph. This influence of the polymorph on the stability of LFS powder against HF was confirmed by investigations of the aged electrolyte by nuclear magnetic resonance (NMR) spectroscopy and ion chromatography (IC).

Details about the publication

Volume: 105
Page range: 542-546
Status: Published
Release year: 2013
Language in which the publication is written: English
DOI: 10.1016/j.electacta.2013.05.013
Link to the full text: http://www.sciencedirect.com/science/article/pii/S0013468613009171

Authors from the University of Münster

Dippel, Christian
Münster Electrochemical Energy Technology Battery Research Center (MEET)
Kraft, Vadim
Münster Electrochemical Energy Technology Battery Research Center (MEET)
Krüger, Steffen
Münster Electrochemical Energy Technology Battery Research Center (MEET)
Li, Jie
Münster Electrochemical Energy Technology Battery Research Center (MEET)
Nowak, Sascha
Münster Electrochemical Energy Technology Battery Research Center (MEET)
Winter, Martin
Münster Electrochemical Energy Technology Battery Research Center (MEET)