XPS study of lithium surface after contact with lithium-salt doped polymer electrolytes
XPS study of lithium surface after contact with lithium-salt doped polymer electrolytes
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DOI：
10.1016/s0013-4686(00)00758-1
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发表时间：
2001-03-15
影响因子：
6.6
通讯作者：
Watanabe, M
中科院分区：
文献类型：
--
作者：
Ismail, I;Noda, A;Watanabe, M
用X射线光电子能谱(XPS)研究了锂金属电极与含LiN(SO，Cf)、(LiTFSi)或LiBF4的聚合物电解液接触前后的表面层和元素组成。金属锂表面的自然膜由外层的Li2CO3/LiOH和内层的Li2O组成。LiF是在锂与电解液接触的过程中，由于自然膜与电解液中的杂质发生反应而形成的。含有LiTFSI的聚合物电解质在内层形成了孔隙率有限的超薄薄膜，这反映在复阻抗谱的有限幅度依赖性上。LIBF4与聚合物的混合导致了较厚的薄膜，具有较高的孔隙率，这是由振荡能级的幅度的较大影响所推测的。(C)2001爱思唯尔科学有限公司。保留所有权利。
X-ray photoelectron spectroscopy (XPS) is used to probe the surface layer and element composition of Li-metal electrodes before and after contact with polymer Electrolytes containing LIN(SO,CF,), (LiTFSI) or LiBF4. Native film on as-received metallic lithium was composed of Li2CO3/LiOH in the outer layer and Li2O in the inner layer. LiF was formed during lithium contact with electrolyte due to reaction between the native film and impurities in the electrolyte. The polymer electrolyte containing LiTFSI yielded a very thin film with limited porosity in the inner layers, which was reflected in the limited amplitude dependence of complex impedance spectra. LIBF4 mixed with polymer resulted in a thicker film with high porosity, as was postulated from the greater influence of the amplitude of the oscillation level. (C) 2001 Elsevier Science Ltd. All rights reserved.