XPS Analysis of K-based Reference Compounds to Allow Reliable Studies of Solid Electrolyte Interphase in K-ion Batteries

被引：62

作者：

Caracciolo, Laure ^{[1
]}

Madec, Lenaic ^{[1
,2
]}

Martinez, Herve ^{[1
,2
]}

机构：

[1] Univ Pau & Pays Adour, E2S UPPA, Inst Sci Analyt & Physicochim Environm & Mat, CNRS,UMRS254, F-64000 Pau, France

[2] CNRS, Reseau Sur Stockage Electrochim Energie RS2E, FR3459, F-80039 Amiens, France

来源：

ACS APPLIED ENERGY MATERIALS | 2021年 / 4卷 / 10期

关键词：

K-ion batteries; solid electrolyte interphase; XPS; K-based reference compounds; binding energy values; RAY PHOTOELECTRON-SPECTROSCOPY; ELECTRODE/ELECTROLYTE INTERFACES; CARBONATE; OXIDE; SEI;

D O I：

10.1021/acsaem.1c02400

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：

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.

引用

页码：11693 / 11699

页数：7

共 28 条

[1] Electrochemical Redox Processes Involved in Carbon-Coated KVPO4F for High Voltage K-Ion Batteries Revealed by XPS Analysis [J].