Intercalation and Deintercalation of Lithium at the Ionic Liquid–Graphite(0001) Interface,The Journal of Physical Chemistry Letters

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Intercalation and Deintercalation of Lithium at the Ionic Liquid–Graphite(0001) Interface
The Journal of Physical Chemistry Letters ( IF 4.8 ) Pub Date : 2017-11-15 00:00:00 , DOI: 10.1021/acs.jpclett.7b02530
Florian Buchner _{1,

2} , Jihyun Kim ₃ , Christiane Adler ₃ , Maral Bozorgchenani ₃ , Joachim Bansmann ₃ , R. Jürgen Behm _{1,

3}

Affiliation

The intercalation and deintercalation of lithium (Li) into / out of graphite(0001), which is a highly important process in Li-ion batteries, was investigated under ultrahigh vacuum conditions as a function of temperature, employing X-ray and ultraviolet photoelectron spectroscopy. Both the up-shifts of the core-level binding energy and the lowering of the work function ΔΦ reveal that heating of a monolayer of the battery-relevant ionic liquid (IL) 1-butyl-1-methyl-pyrrolidinium bis(trifluoromethylsulfonyl)imide ([BMP]⁺[TFSI]⁻) adsorbed on lithiated graphite at 80 K to >230 K facilitates an accumulation of partially charged Li^δ+ atoms at the IL–graphite(0001) interface. This is accompanied by a partial IL decomposition, which is associated with the initial stages of the chemical formation of the solid–electrolyte interphase.

中文翻译：

离子液体-石墨（0001）界面上锂的嵌入和脱嵌

使用X射线和紫外光电子能谱研究了在超高真空条件下随温度变化的锂（Li）嵌入和脱嵌石墨（0001）在锂离子电池中非常重要的过程，这是锂离子电池中非常重要的过程。。核心能级结合能的上移和功函数ΔΦ的降低都表明，与电池相关的离子液体（IL）1-丁基-1-甲基-吡咯烷鎓双（三氟甲基磺酰基）酰亚胺的单层加热在80 K至> 230 K的条件下吸附在锂化石墨上的（[BMP] ⁺ [TFSI] ^-）有助于部分带电的^Liδ+的积累IL–graphite（0001）界面处的原子。这伴随着部分IL分解，这与固体-电解质中间相的化学形成的初始阶段有关。

更新日期：2017-11-16

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