Monochromatic X-ray Photoelectron Spectroscopy Study of Three Different Ionic Liquids in Interaction with Lithium-Decorated Copper Surfaces
Monochromatic X-ray Photoelectron Spectroscopy Study of Three Different Ionic Liquids in Interaction with Lithium-Decorated Copper Surfaces
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三种不同离子液体与锂修饰铜表面相互作用的单色X射线光电子能谱研究
DOI：
10.1021/acs.jpcc.6b10139
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发表时间：
2017
影响因子：
3.7
通讯作者：
Frank Endres
中科院分区：
文献类型：
--
作者：
Mark Olschewski;René Gustus;Oliver Höfft;Abhishek Lahiri;Frank Endres
比较研究了三种不同的离子液体在Li/Cu表面上的化学反应。在这项研究中，离子液体1-丁基-1-甲基吡咯烷双[氟磺酰基]酰亚胺（[Py 1，4]FSI），1-丁基-1-甲基吡咯烷双[三氟甲基磺酰基]酰亚胺（[Py 1，4]TFSI），和1-辛基-3-甲基咪唑双（三氟甲基磺酰基）酰亚胺（[OMIm]TFSI）进行了表征后，吸附在Li/Cu的单色X射线光电子能谱。所有光谱都证明了LiF和Li 2 O的形成，这证实了阴离子的部分分解。发现[Py 1，4]TFSI比[Py 1，4]FSI的强度低得多，表明在锂的存在下FSI阴离子的分解更快。此外，在光谱中还观察到阳离子结构的变化以及阴离子/阳离子比的变化。总之，由于与锂的相互作用，阳离子最有可能从Li/Cu表面置换并部分分解，特别是在[OMIm]TFSI的情况下。研究结果对离子液体作为锂电池电解质或添加剂时在锂表面可能的反应产物进行了概述。此外，它还深入了解了阳离子和阴离子在电池系统中形成固体电解质界面层的具体作用。
A comparative study of the chemical reactions of three different ionic liquids prepared by physical vapor deposition on a Li/Cu surface was performed. In this investigation, the ionic liquids 1-butyl-1-methylpyrrolidinium bis[fluorosulfonyl]imide ([Py1,4]FSI), 1-butyl-1-methylpyrrolidinium bis[trifluoromethylsulfonyl]imide ([Py1,4]TFSI), and 1-octyl-3-methylimidazolium bis(trifluoromethylsulfonyl)imide ([OMIm]TFSI) were characterized by monochromatic X-ray photoelectron spectroscopy after adsorption on Li/Cu. All spectra prove the formation of LiF and Li2O, which verifies the partial decomposition of the anions. This is found to be much less intense for [Py1,4]TFSI than for [Py1,4]FSI, indicating a more rapid decomposition of the FSI anion in the presence of lithium. In addition, changes of the cation structure, as well as changes of the anion/cation ratio, were observed in the spectra. In summary, cations were most likely displaced from the Li/Cu surface and were partially decomposed, especially in case of [OMIm]TFSI, due to the interaction with lithium. The results give an overview on the possible reaction products at the Li surface when using ionic liquids as electrolytes or additives for lithium batteries. Additionally, it gives an insight into the specific role of the cations and anions for the formation of the solid electrolyte interphase layer in battery systems.
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离子液体[BMP][TFSA]与金红石TiO2(110)和共吸附锂的相互作用。
DOI：
--
发表时间：
2016
期刊：
Physical Chemistry, Chemical Physics - PCCP
影响因子：
--
作者：
B. Uhl;M. Hekmatfar;F. Buchner;R. Behm
通讯作者：
R. Behm
影响因子：
3.7
作者：
A. Lahiri;T. Carstens;R. Atkin;N. Borisenko;F. Endres
通讯作者：
A. Lahiri;T. Carstens;R. Atkin;N. Borisenko;F. Endres
DOI：
10.1063/1.3273087
发表时间：
2009-12
期刊：
The Journal of chemical physics
影响因子：
--
作者：
H. Valencia;M. Kohyama;Shingo Tanaka;H. Matsumoto
通讯作者：
H. Valencia;M. Kohyama;Shingo Tanaka;H. Matsumoto
影响因子：
3.3
作者：
Olschewski, Mark;Gustus, Rene;Endres, Frank
通讯作者：
Endres, Frank
影响因子：
6.6
作者：
Ismail, I;Noda, A;Watanabe, M
通讯作者：
Watanabe, M