XPS Analysis of K-based Reference Compounds to Allow Reliable Studies of Solid Electrolyte Interphase in K-ion Batteries,ACS Applied Energy Materials

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XPS Analysis of K-based Reference Compounds to Allow Reliable Studies of Solid Electrolyte Interphase in K-ion Batteries
ACS Applied Energy Materials ( IF 5.4 ) Pub Date : 2021-09-29 , DOI: 10.1021/acsaem.1c02400
Laure Caracciolo ₁ , Lénaïc Madec _{1,

2} , Hervé Martinez _{1,

2}

Affiliation

As for Li- and Na-ion batteries, the electrolyte reactivity (i.e., the salt and solvent decomposition) also plays a crucial role in the electrochemical performance of K-ion batteries (KIBs). However, X-ray photoelectron spectroscopy (XPS) analysis of a solid electrolyte interphase (SEI) in KIBs remains based on Li-ion and Na-ion literature so far. This may lead to incorrect interpretations of the results considering that the first ionization potential difference between the alkali metals is expected to significantly change the binding energy values observed by XPS for a given M-based (M = Li, Na, or K) compound. Therefore, this work aims at providing XPS characterization of numerous commercial K-based reference compounds, including some that were still missing in the literature. In particular, absolute and relative binding energy values are given and compared to corresponding Li and Na counterparts. This work will thus help researchers to get reliable XPS analysis of the SEI in KIBs.

中文翻译：

对 K 基参考化合物进行 XPS 分析，以便对 K 离子电池中的固体电解质中间相进行可靠研究

对于锂离子和钠离子电池，电解质反应性（即，盐和溶剂分解）在钾离子电池（KIB）的电化学性能中也起着至关重要的作用。然而，迄今为止，KIB 中固体电解质中间相 (SEI) 的 X 射线光电子能谱 (XPS) 分析仍然基于锂离子和钠离子文献。考虑到碱金属之间的第一电离电位差预计会显着改变 XPS 观察到的给定 M 基（M = Li、Na 或 K）化合物的结合能值，这可能会导致对结果的错误解释。因此，这项工作旨在提供许多基于 K 的商业参考化合物的 XPS 表征，包括一些文献中仍然缺失的化合物。特别是，给出了绝对和相对结合能值，并与相应的 Li 和 Na 对应物进行了比较。

更新日期：2021-10-25

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