Abstract
The comparative study of lithium bis(oxalato)borate (LiBOB) and lithium bis(fluorosulfonyl)imide (LiFSI) used as an additive in the performance of lithium manganese oxide spinel (LiMn2O4) cathode was systematically investigated at elevated temperature. The results indicated that a solid-electrolyte interphase (SEI) film on cathode produced by the oxidation of the LiFSI additive is more robust and stable against Mn dissolution problem during cycling at 55°C compared with the SEI formed by the oxidation of the Blank and the LiBOB-added electrolyte. LiFSI aids in stabilizing the electrolyte by trapping the PF5, i.e., sequestering the radical which tends to oxidize EC and DEC electrolyte solvents. Thus, oxidation is suppressed on the cathode, as evidenced by scanning electron microscopy (SEM), inductively coupled plasma-atomic emission spectrometry (ICP-AES) and X-ray photoelectron spectroscopy (XPS). As a result, HF generation is suppressed, which results in less Mn dissolution from the spinel cathode.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
