Degradation and Speciation of Li Salts during XPS Analysis for …
2022年9月6日 · Herein, we present a systematic XPS study of three different Li salts, namely lithium bis(fluorosulfonyl)imide (LiFSI), lithium bis(trifluoromethanesulfonyl)imide (LiTFSI), and lithium hexafluorophosphate (LiPF 6). A side-by-side comparison reveals that the binding energies of constituent elements sensitively shift in response to their distinct ...
斯坦福大学鲍哲南：电池研究中锂盐在XPS分析中的降解和形态分 …
2024年1月25日 · 斯坦福大学鲍哲南教授团队对三种不同的锂盐，即双(氟磺酰基)酰亚胺锂(lifsi)、双(三氟甲磺酰基)酰亚胺锂(litfsi)和六氟磷酸锂(lipf6)进行了系统的xps研究。并排比较表明，组成元素的结合能敏感地随其不同的化学环境而变化。
Exploring the chemistry of “Organic/water-in-salt” electrolyte in ...
2022年7月20日 · The resulting LIG-PPy hybrid material exhibits a wide potential window of 2.4 V in LiTFSI-based acetonitrile-water in salt (AWIS) electrolyte. The specific capacitance of the active electrode is achieved as 168 mF cm −2 under optimized electrolytic conditions in …
Ionic liquid electrolyte with highly concentrated LiTFSI for lithium ...
2018年9月20日 · X-ray photoelectron spectroscopy (XPS) was employed to investigate the distribution of chemical elements on the surface of the cycled lithium metal electrodes at room temperature using an electron spectroscopy for chemical analysis spectrometer (PHI-1600, USA) with a monochromatic Al-Kα (1486.6 eV) source. All procedures before testing were ...
Heterogeneity and Nanostructure of Superconcentrated LiTFSI…
2022年7月12日 · In the present work, we elucidate the microscopic structures of LiTFSI–EmimTFSI-based hybrid aqueous electrolytes and compare them with the structure of LiTFSI-based WiSE using molecular dynamics simulations. Our analysis reveals the presence of alternating water-rich clusters and TFSI-rich extended domains in the WiSE.
Stable non-corrosive sulfonimide salt for 4-V-class lithium metal ...
2022年2月14日 · Herein, we report on a non-corrosive sulfonimide salt, lithium (difluoromethanesulfonyl) (trifluoromethanesulfonyl)imide (LiDFTFSI), that remarkably suppresses the anodic dissolution of the Al 0...
XPS study of lithium surface after contact with lithium-salt doped ...
2001年3月15日 · 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 2 CF 3) 2 (LiTFSI) or LiBF 4. Native film on as-received metallic lithium was composed of Li 2 CO 3 /LiOH in the outer layer and Li 2 O in the inner layer.
Uncovering the critical impact of the solid electrolyte interphase ...
2021年9月22日 · To identify the reason for enhanced stability of SEI in concentrated electrolyte, x-ray photoelectron spectroscopy (XPS) spectra with etching technology was employed to characterize the SEI layer of lithium anodes in different electrolytes.
Challenges in XPS Analysis of PEO‐LiTFSI‐Based Solid Electrolytes: …
2024年6月20日 · Our research presents a critical examination of X-ray induced photodecomposition, commonly misinterpreted as (electro)chemical electrolyte decomposition, in PEO-LiTFSI systems and those with NCM cathodes.
A comparative XPS surface study of Li 2 FeSiO 4 / C cycled with LiTFSI …
X-Ray photoelectron spectroscopy (XPS) has been used to characterise the surfaces of carbon-coated Li 2 FeSiO 4 cathodes extracted from Li-ion batteries in both a charged and discharged state. 1 M lithium bis (trifluoromethylsulfonyl)imide (LiTFSI) and lithium hexafluorophosphate (LiPF 6) based electrolytes were used with ethylene carbonate (EC)...