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Author: Karina Asheim Abstract<\/strong><\/p>\n\n\n\n Silicon is a promising high capacity anode material for\nLi-ion batteries. The challenge is electrode degradation and continuous\nsolid-electrolyte interphase (SEI) growth due to volume expansion during\nlithiation. A stable and strong SEI is then crucial for the performance. The\ncommercially used LiPF6 salt is susceptible to hydrolysis, forming HF which\netches the SiO2 layer. An alternative salt, lithium bis(fluorosulfonyl)imide\n(LiFSI), has been found to improve performance of Si electrodes compared to\nwhen using LiPF6. In this work, LiFSI is evaluated as electrolyte salt for Si\nanode and NMC cathode in half-cell configuration. Through post mortem\ncharacterization, involving cross sectional analysis, using FIB in combination\nwith SEM, TEM to evaluate crystallinity of particles and acquire element maps\nof the SEI, and XPS of the electrode surface to determine which oxidation state\nof elements are present, the improved performance of Si when using LiFSI is\nattempted explained.<\/p>\n\n\n\n Full list of posters<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"
Title: LiFSI as electrolyte salt for silicon anodes and NMC cathodes
Affiliation: Norwegian University of Science and Technology<\/em><\/p>\n\n\n\n