ãSweeping potential regulated structural and chemical evolution of solid-electrolyte interphase on Cu and Li as revealed by cryo-TEMã?was published in Nano Energy in 2020. These research results belong to Xu, Yaobin; Wu, Haiping; Jia, Hao; Engelhard, Mark H.; Zhang, Ji-Guang; Xu, Wu; Wang, Chongmin. Product Details of 872-36-6 The article mentions the following:
A fundamental understanding of solid-electrolyte interphase (SEI) is paramount importance for controlling the cycling performance of rechargeable lithium metal batteries. The structural and chem. evolution of SEI with respect to electrochem. operating condition remains barely established. Here we develop a unique method for imaging the evolution of SEI formed on the Cu foil under sweeping electrochem. potential. By using cryogenic TEM imaging combined with energy dispersive X-ray spectroscopy and XPS electronic structure analyses, we reveal that, for the vinylene carbonate (VC)-free electrolyte, the SEI formed at 1.0 V is a monolithic amorphous structure, which evolves to amorphous matrix embedded with Li2O particles as the voltage decreases to 0 V. In the case of VC-containing electrolyte, the SEI is featured by an amorphous matrix with Li2O particles from 1.0 V to 0 V. The thickness of SEI formed on Cu foil increases with decreasing voltage. Associated with the localized charge modulation by the surface topog. feature and defects in the Cu foil, the SEI layer shows direct spatial correlation with these structural defects in the Cu. In addition, upon Li deposition, the SEI formed on the Li metal has similar thickness with, but different composition from the SEI formed on the Cu foil at 0 V. Those results provide insight toward SEI engineering for enhanced cycling stability of Li metal. The experimental part of the paper was very detailed, including the reaction process of Vinylene carbonate(cas: 872-36-6Product Details of 872-36-6)
Vinylene carbonate(cas: 872-36-6) belongs to esters. Alkyl carbonates find applications as solvents for lithium ion battery electrolytes and the use of high quality battery grade electrolytes having extremely low water (<10 ppm) and acid (<10 ppm) contents are critical for achieving high electrochemical performance.Product Details of 872-36-6
Referemce:
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics