Surface film formation on TiSnSb electrodes: Impact of electrolyte additives

被引:15
作者
Zhang, W. [1 ,2 ]
Ghamouss, F. [2 ]
Darwiche, A. [3 ]
Monconduit, L. [3 ]
Lemordant, D. [2 ]
Dedryvere, R. [1 ]
Martinez, H. [1 ]
机构
[1] Univ Pau, UMR 5254, CNRS, IPREM ECP, F-64053 Pau 9, France
[2] Univ Tours, PCM2E, F-37200 Tours, France
[3] Univ Montpellier 2, ICG AIME, F-34095 Montpellier, France
关键词
Li-ion batteries; TiSnSb; Solid electrolyte interphase; XPS; EIS; SEM; LITHIUM-ION BATTERIES; TIN-BASED INTERMETALLICS; ELECTROCHEMICAL PERFORMANCE; IMPEDANCE SPECTROSCOPY; 3-ELECTRODE IMPEDANCE; ANODE MATERIAL; CELLS; CARBONATE; SKUTTERUDITE; INTERPHASE;
D O I
10.1016/j.jpowsour.2014.06.041
中图分类号
O64 [物理化学(理论化学)、化学物理学];
学科分类号
070304 ; 081704 ;
摘要
X-ray photoelectron spectroscopy (XPS), scanning electron microscopy (SEM), and electrochemical impedance spectroscopy (EIS) have been performed to study the formation of surface film on TiSnSb, a promising conversion anode material for lithium ion battery. TiSnSb electrodes were cycled using a standard EC/PC/3DMC (1 M LiPF6) electrolyte containing vinylene carbonate (VC) as a primary filming agent. Fluoroethylene carbonate (FEC) was added as an additional additive intended to improve the stability of the surface film and, hence, the cyclability of the electrode. Surface analysis was performed by a combined XPS core peaks and quantification data analysis to establish the main components of the solid electrolyte interphase film (SEI) were identified. The key observation is that the thickness and the chemical nature of the SEI layer is strongly related to the nature of the electrolyte additives. From XPS and EIS results, the role of FEC as an effective SEI improver in alkylcarbonate based electrolyte has been enlighten. (C) 2014 Elsevier B.V. All rights reserved.
引用
收藏
页码:645 / 657
页数:13
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